Temat: insect control - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A breakthrough in the efficiency of contact DNA insecticides: rapid high mortality rates in the sap-sucking insects Dynaspidiotus britannicus Comstock and Unaspis euonymi Newstead
Autorzy:: Gal`chinsky, N.
Useinov, R.
Yatskova, E.
Laikova, K.
Novikov, I.
Gorlov, M.
Trikoz, N.
Sharmagiy, A.
Plugatar, Y.
Oberemok, V.
Powiązania:: https://bibliotekanauki.pl/articles/2082776.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: antisense oligonucleotides
DNA insecticides
insect pest control
sap-sucking
insects
28S ribosomal RNA
Opis:: In this short communication describing experiments carried out on the larvae of two insects, Unaspis euonymi Comstock (feeding on Euonymus japonicus Thunb.) and Dynaspidiotus britannicus Newstead (feeding on Laurus nobilis L.), we evaluate for the first time the efficiency of using DNA insecticides in the control of sap-sucking insects, including armored scale insects. Over a period of 10 days, high insect mortality was detected in both U. euonymi and D. britannicus, accompanied by a significant decrease in the concentration of target RNAs. At the same time, no visible changes were observed when the leaves of the host plants were subjected to treatment with DNA insecticides for one month. The results show the high efficiency of DNA insecticides used against hemipteran insect pests. It is noteworthy that the high efficiency of DNA insecticides and their low cost in comparison with RNA preparations provides a safe and extremely promising potential vehicle for the control of sap-sucking insects.
Źródło:: Journal of Plant Protection Research; 2020, 60, 2; 220-223
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Insecticidal activity of three 10–12 nucleotides long antisense sequences from 5.8S ribosomal RNA gene of gypsy moth Lymantria dispar L. against its larvae
Autorzy:: Oberemok, V.V.
Laikova, K.V.
Useinov, R.Z.
Gal`chinsky, N.V.
Novikov, I.A.
Yurchenko, K.A.
Volkov, M.E.
Gorlov, M.V.
Brailko, V.A.
Plugatar
Powiązania:: https://bibliotekanauki.pl/articles/2084849.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: antisense oligonucleotides
DNA insecticides
gypsy moth
insect pest control
Lymantria dispar
5.8S ribosomal RNA
Opis:: 5.8S ribosomal RNA plays an important role in protein synthesis and eukaryotic ribosome translocation. Contact DNA insecticides based on antisense fragments of 5.8S ribosomal RNA gene of gypsy moth Lymantria dispar L. showed prospective insecticidal activity on its larvae. The most pronounced insecticidal effect was found for antisense fragments 10 and 11 nucleotides long (oligoRIBO-10 and oligoRIBO-11), whereas 12 nucleotides long fragment (oligoRIBO-12) caused the lowest level of insect mortality. This data corresponds to results obtained earlier using rabbit reticulocyte and wheat germ extracts, where maximum inhibition of protein synthesis was observed when a relevant oligomer 10-11 nucleotides long was used, whilst longer chain lengths resulted in reduced inhibition. Using oligoRIBO-11 fragment we have shown penetration of antisense oligonucleotides to insect cells through insects’ exoskeletons. MALDI technique registered the penetration of the oligoRIBO-11 fragment into insect cells after 30 min and a significant response of insect cells to the applied oligonucleotide after 60 min, which indicates not only that the oligonucleotide enters the insect cells, but also the synthesis of new substances in response to the applied DNA fragment. Contact DNA insecticides developed from the L. dispar 5.8S ribosomal RNA gene provide a novel biotechnology for plant protection using unmodified antisense oligonucleotides.
Źródło:: Journal of Plant Protection Research; 2019, 59, 4; 561-564
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Skuteczność insektycydu Mimic 240 LV w ochronie sosny zwyczajnej Pinus sylvestris L. przed brudnicą mniszką Lymantria monacha L. i barczatką sosnówką Dendrolimus pini L.
Efficacy of Mimic 240 LV in the protection of Scots pine Pinus sylvestris L. against the nun moth Lymantria monacha L. and the pine lappet moth Dendrolimus pini L.
Autorzy:: Głowacka, B.
Bystrowski, C.
Skrzecz, I.
Powiązania:: https://bibliotekanauki.pl/articles/985922.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: barczatka sosnowka
lesnictwo
ochrona lasu
drzewa lesne
sosna zwyczajna
Pinus sylvestris
szkodniki roslin
brudnica mniszka
Lymantria monacha
Dendrolimus pini
zwalczanie szkodnikow
insektycydy
Mimic 240 LV
skutecznosc
insect control
mature stand defoliators
tebufenozide
Opis:: The nun moth Lymantria monacha L. and pine lappet moth Dendrolimus pini L belong to the insects occurring in cyclical outbreak threatening the sustainability of Scots pine Pinus sylvestris L. forests. The populations of both species are reduced in aerial treatments carried out in Poland on thousands of hectares. Therefore there still is a need to implement to the forest practice insecticides that characterize by high efficiency and meet the safety standards for the environment. The aim of the study was to evaluate the effectiveness of Mimic 240 LV (24% of tebufenozide) in the control of nun moth and pine lappet moth populations. Aerial treatments were performed in 55−80−years old Scots pine stands located in three forest districts on the area of Regional Directorate of the State Forest in Zielona Góra (western Poland). The experiment consisted of one aerial spray to limit the population of nun moth with the use of tested insecticide at a dose of 0.3 l/ha and two aerial treatments to control pine lappet moth with a doses of 0.4 and 0.5 l/ha. The treatments were conducted with the use of Dromader M−18 and AN−2R aircrafts equipped with Micronair AU 5000 atomizer. The insecticide was mixed with adjuvant Ikar 95 EC (mineral oil) and water, and applied at a dose of 3 l of spray solution/ha. In the case of L. monacha, evaluation of treatment efficacy showed insect mortality at the rate of 98.7%. The lower and higher doses of Mimic 240 LV caused the mortality of 90.4% and 97.2% of D. pini caterpillars respectively. The obtained results confirm a high efficacy of tested insecticide, which can be recommended for aerial applications in the forest practice.
Źródło:: Sylwan; 2018, 162, 05; 403-410
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Does time of protective procedure and genotype of chamomile affect yield?
Autorzy:: Kowalska, J.
Seidler-Łożykowska, K.
Jakubowska, M.
Drożdżyński, D.
Powiązania:: https://bibliotekanauki.pl/articles/2048965.pdf
Data publikacji:: 2019
Wydawca:: Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:: essential oil
chamomile
organic farming
control of insect pests
spinosad
olejek eteryczny
rumianek
rolnictwo ekologiczne
zwalczanie szkodników upraw
Opis:: Objective: Chamomile plants (Chamomilla recutita L. Rausch) are often attacked by pests, which usually cause the decrease of raw material yield and its quality. The objects of field trial were two chamomile cultivars: Złoty Łan (4n) and Promyk (2n) cultivated under organic regime. The aim of this study was to evaluate of impact of the spinosad treatment and its time of application on two chamomile cultivars: cv. Promyk – 2n and cv. Złoty Łan – 4n exposed to insect pests. Methods: The first treatment with spinosad as a preventative control (P) was performed in the early phase of plant development (seven leaves). Intervention (I) treatment was made in green bud phase. In both terms of observation insect pests were observed and collected. In each spraying application of 0.06 g of spinosad per 1 liter of water was used. Results: Spinosad was able to limit the number of pest population and finally increased yielding of the treated cultivars as compared to the untreated plants. Time of spinosad application for cv. Złoty Łan plants was not statistically siginificant, although was more effective for the preventative treatment of cv. Promyk in the increasing of the plant biomass (283.8 g · m-2) and seed (32 g · m-2) yields than intervention. Conclusion: Protection treatment with spinosad might be recommended in chamomile cultivation and it is more effective than intervention in diploid cultivar which begin blooming earlier than tetraploid. Essential oil content was not related with protection treatment for diploid cultivar, although intervention in tetraploid cultivar caused higher content of oil.
Źródło:: Herba Polonica; 2019, 65, 4; 1-6
0018-0599
Pojawia się w:: Herba Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Larvicidal activity of Bacillus thuringiensis Colombian native strains against Bemisia tabaci (Hemiptera: Aleyrodidae)
Autorzy:: Cabra, E.T.
Hernandez Fernandez, J.A.
Powiązania:: https://bibliotekanauki.pl/articles/2084862.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: biological control
genes cry
insect pest
molecular characterization
Opis:: The whitefly, Bemisia tabaci, an insect of the order Hemiptera which attacks more than 600 species of plants, is one of the most important agricultural pests around the world. The insecticidal Cry proteins from Bacillus thuringiensis (Bt) are useful biological pesticides, and some are toxic to Hemipteran insects. In this study, Colombian native isolates of Bt were functionally characterized at molecular and biological levels. The strains contained between one and five different crystal shapes: round, triangular, amorphous, bipyramidal and squared. The strains presented between three to seven bands of proteins in their electrophoretic pattern that were organized into six groups according to their possible biological activity on insect pests. Cry1Aa, cry1Ab, cry1Ac, cry1B and cry1C genes were identified for PCR in the different Bt isolates. Bioassays were performed on tomato leaves whose surface was spread with 3 µg · ml−1 crude extract of Bt toxins. Second instar larvae of whitefly, which were placed on top of leaves and exposed to the toxins for 7 days, exhibited mortalities from 18 to 69%. The lethal concentration 50 (LC50) of ZBUJTL39, Bt kurstaki HD1 and ZCUJTL9 strains were 1.83, 1.85 and 2.16 μg · ml−1, respectively (p < 0.05). These results show that the native Bt strain ZBUJTL39, which contained the genes cry1Aa, cry1Ab, cryCa and cryBa could eventually be used for the development of an integrated management program together with other tools for the control of B. tabaci.
Źródło:: Journal of Plant Protection Research; 2019, 59, 4; 503-511
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Assessment of control strategies against Cydia pomonella (L.) in Morocco
Autorzy:: Iraqui, S.
Hmimina, M.
Powiązania:: https://bibliotekanauki.pl/articles/66433.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: assessment
control strategy
Cydia pomonella
insect resistance
insecticide control
sexual trap
Morocco
Opis:: The codling moth, Cydia pomonella (L.), is the key pest of apple production worldwide. In Morocco, there is a sustainable presence of codling moth causing considerable damage in apple orchards despite frequent applications of broad spectrum insecticides. For 12 years, sexual trapping and chemical control were performed and the development of the codling moth population was analysed in an orchard which was in the region of Azrou. The efficacy of some insecticides (azinphos-methyl, chlorpyriphos-ethyl, diflubenzuron, thiacloprid, methoxyfenozide, spinosad, and deltamethrin) was also evaluated on neonate larvae and compared with a laboratory sensitive strain. This procedure was done to assess an eventual resistance in Moroccan populations. The action threshold was usually exceeded, leading to an intensive chemical control, with an average frequency of 9 to 13 days. The chemical control was done according to the action persistence time of the insecticides and the trap captures. However, those two parameters are compromised in Moroccan conditions because of the high summer temperatures which disrupt the action of insecticides and exacerbate populations. The pheromone traps may become ineffective and useless. Neonate larvae were resistant to five insecticides out of seven. Such results suggest the presence of a cross resistance in local strains. Overall, the insect resistance, the functioning of the sexual traps, and some insecticides properties (persistence action, pre-harvest interval) are the key factors that could explain the failure to control these moths under Moroccan conditions.
Źródło:: Journal of Plant Protection Research; 2016, 56, 1
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: The endocrine control of Malpighian tubule secretion: past, present and future
Autorzy:: Coast, G.M.
Powiązania:: https://bibliotekanauki.pl/articles/55107.pdf
Data publikacji:: 2008
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: diuretic hormone
ion transport
Malpighian tubule secretion
insect
biogenic amine
endocrine control
diuresis control
neuropeptide
primary urine formation
Opis:: Work by Ramsay in the 1950’s established the foundations for our current understanding of primary urine production by Malpighian tubules and we now have detailed knowledge of the epithelial transport processes underlying fluid secretion. Identified neuropeptides and biogenic amines have been shown to stimulate fluid secretion and, for some, detailed information is available on the second messenger pathways and transport processes they activate. There are significant gaps in our knowledge, however, particularly concerning the role of identified diuretics in vivo. The hormonal status of many has yet to be established and it is also unclear whether they are used to control different types of diuresis.
Źródło:: Pestycydy; 2008, 1-2; 87-94
0208-8703
Pojawia się w:: Pestycydy
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Aspects of the control of diuresis in the blood gorging insect, Rhodnius prolixus
Autorzy:: Orchard, J.
Donini, A.
Powiązania:: https://bibliotekanauki.pl/articles/54968.pdf
Data publikacji:: 2008
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: diuretic hormone
neurosecretory cell
blood
insect
Malpighian tubule
Rhodnius prolixus
gorging insect
diuresis control
neuropeptide
dorsal unpaired median cell
serotonin
Opis:: Post-feeding diuresis in Rhodnius prolixus is neurohormonally controlled by serotonin and at least one peptidergic diuretic hormone (possibly a CRF-related peptide). These appear to be released by two different neurosecretory groups – 5 dorsal unpaired median (DUM) cells and 5-6 lateral neurosecretory cells of the mesothoracic ganglionic mass. The DUM cells co-localize serotonin and the calcitonin-related peptide RhoprDH31. The lateral neurosecretory cells co-localize a CRF-related peptide and a kinin-like peptide. Serotonin and the CRF-related peptide, ZooneDH, each stimulate maximum secretion by the upper Malpighian tubules, whereas only serotonin stimulates KCl reabsorption from the lower Malpighian tubules. RhoprDH31 is only weakly diuretic and Leucokinin 1 has no diuretic activity. Neither stimulates KCl reabsorption. The possible role for multiple diuretic hormones and for co-localization of diuretic factors is discussed.
Źródło:: Pestycydy; 2008, 1-2; 61-66
0208-8703
Pojawia się w:: Pestycydy
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: The cotton mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) as a new menace to cotton in Egypt and its chemical control
Autorzy:: El-Zahi, E.-Z.S.
Aref, S.A.E.-S.
Korish, S.K.M.
Powiązania:: https://bibliotekanauki.pl/articles/65005.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: insect
cotton mealybug
mealybug
Phenacoccus solenopsis
Hemiptera
Pseudococcidae
new menace
cotton
Egypt
chemical control
Opis:: The cotton mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) is a polyphagous sap sucking insect with a wide geographical and host range causing severe losses in economically important crops. This study represents the first record of P. solenopsis as a new insect attacking cotton plants (Gossypium barbadense var. Giza 86) in Kafr El-Sheikh governorate, Egypt. The insect was noticed on cotton plants for the first time during its growing season of 2014. The mealybug specimens were collected from infested cotton plants and identified as P. solenopsis. In an attempt to control this pest, eight toxic materials viz., imidacloprid, thiamethoxam, flonicamid, emamectin-benzoate, chlorpyrifos, methomyl, deltamethrin and mineral oil (KZ-oil), belonging to different chemical groups, were tested for their influence against P. solenopsis on cotton under field conditions. Methomyl, imidacloprid, thiamethoxam and chlorpyrifos showed the highest efficacy against P. solenopsis recording 92.3 to 80.4% reduction of the insect population. Flonicamid, emamectin-benzoate and KZ-oil failed to exhibit sufficient P. solenopsis control.
Źródło:: Journal of Plant Protection Research; 2016, 56, 2
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: System for warning and control of leaf mining flies and leaf beetles on cereal crops
Autorzy:: Walczak, F
Powiązania:: https://bibliotekanauki.pl/articles/65294.pdf
Data publikacji:: 1998
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: pest
Agromyzidae
crop damage
control
warning
larva
leaf mining fly
cereal crop
trapped insect
Opis:: Many species of leaf mining flies feed on cereal crops. Cereal crop plantations with high level of the pest infestation need to be treated with insecticides. The yellow tables covered with glue were used for trapping the pests. The leaf mining flies warning system can provide the information about date of treatment based on counting the trapped imagines of the pest and observation of leaf beetle appearance and its development. The following species of leaf mining flies are the most common in Poland: Phytomyza nigra Mg., Agromyza ambigua Fll., Ceroclontha pygmaea Mg., Agromyza mobilis Mg.
Wzrost liczebności i szkodliwości miniarek w uprawach zbóż w Polsce stwierdzono na początku lat dziewięćdziesiątych. Larwy miniarek żerują w tkance miękiszowej liści, w wyniku czego powstają charakterystyczne uszkodzenia (miny). W niektórych rejonach kraju lokalnie owady te mogą występować liczniej i przyczyniać się do znacznego ograniczenia powierzchni asymilacyjnej liści (głównie flagowych i podflagowych), co w konsekwencji ma wpływ na wartość i wielkość plonu. Celem pracy było opracowanie wskazówek metodycznych przy podejmowaniu decyzji o chemicznym zwalczaniu na zbożach miniarek równocześnie ze skrzypionkami. W wyniku przeprowadzonych badań stwierdzono, że dobrą praktyczną metodą sygnalizacji chemicznego zwalczania tych szkodników jest kontrola liczebności form dorosłych miniarek, odławianych na tablicach chwytnych w kolorze żółtym, przy równoległej obserwacji pojawu i rozwoju skrzypionek.
Źródło:: Journal of Plant Protection Research; 1998, 38, 1
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Insecticidal efficacy of silica nanoparticles against Rhyzopertha dominica F. and Tribolium confusum Jacquelin du Val
Autorzy:: Ziaee, M.
Ganji, Z.
Powiązania:: https://bibliotekanauki.pl/articles/66106.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: insecticidal potential
silica
nanoparticle
Rhyzopertha dominica
Tribolium confusum
barley
pest control
plant protection
wheat
insect pest
Opis:: Bioassays were conducted to assess the effects of two silicon dioxide nanoparticles of Aerosil® and Nanosav against adults of Rhyzopertha dominica F. and Tribolium confusum Jacquelin du Val. Silica nanoparticles were applied at the rates of 50, 100, 200 and 300 mg · kg–1 on wheat and peeled barley. The mortality was counted after 1, 2, 3, and 7 days of exposure. Another experiment was carried out to evaluate the effect of food source on the survival of beetles after exposure to silica nanoparticles. Adults were exposed to silica nanoparticles at the rate of 0.2 mg · cm–2 for 1 and 2 days on filter paper inside plastic Petri dishes, respectively. After exposure, the initial mortality was counted and live individuals of both species were held for a week in empty glass vials or vials containing wheat and wheat flour, respectively. Silica nanoparticles have high toxicity on R. dominica and T. confusum adults. Rhyzopertha dominica was more susceptible than T. confusum. However, the mortality of both species increased with increasing concentrations and time exposed to each concentration. At low concentrations, Aerosil® was more effective than Nanosav. Silica nanoparticles were more effective in wheat grains than barley. Results indicated that the initial mortality was so high that the impact of food source on delay mortality was unclear in most cases. Silica nanoparticles were efficient against tested species and can be used effectively in a stored grain integrated pest management program.
Źródło:: Journal of Plant Protection Research; 2016, 56, 3
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Toxicological and environmental aspects of carrot fly [Psila rosae Fabr.] control
Autorzy:: Sadlo, S.
Filar, M.
Szpyrka, E.
Powiązania:: https://bibliotekanauki.pl/articles/55198.pdf
Data publikacji:: 2008
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: insecticide
environment
carrot fly
residue
parsley
chlorothalonil
fungicide
toxicology
plantation
pest control
insect
plant protection
Psila rosae
chlorpyrifos
carrot
Opis:: The objectives of this work were to describe the residual behaviour of chlorpyrifos (insecticide) and chlorothalonil (fungicide), applied for the protection of carrot and parsley plantations. The field tests were carried out at farms located near Rzeszów (South-Eastern Poland) on processing carrot and parsley destined for baby food production. The results obtained indicated that disappearance rate of chlorothalonil on carrot leaves was significantly faster and its half-life time was about 7 times shorter than that of chlorpyrifos. In weather conditions of 2006, chlorpyrifos residues in rape carrot and parsley roots were reduced to levels lower than MRL and even the rigorous value of 0.01 mg/kg.
Źródło:: Pestycydy; 2008, 1-2; 119-126
0208-8703
Pojawia się w:: Pestycydy
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Biogenic silver nanoparticles from Trichodesma indicum aqueous leaf extract against Mythimna separata and evaluation of its larvicidal efficacy
Autorzy:: Buhroo, A.A.
Nisa, G.
Asrafuzzaman, S.
Prasad, R.
Rasheed, R.
Bhattacharyya, A.
Powiązania:: https://bibliotekanauki.pl/articles/65016.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: insect
pest control
biogenic substance
silver nanoparticle
Trichodesma indicum
water extract
leaf extract
Mythimna separata
Oriental armyworm
pest
larvicidal activity
Opis:: Th e present exploration is focused on the bio-fabrication of silver nanoparticles (Ag NPs) using Trichodesma indicum aqueous leaf extract as a reducing agent. Th e synthesized Ag NPs were productively characterized by UV-vis spectroscopy, XRD, and TEM studies. Th e photosynthesis of Ag NPs was done at room temperature for 24 h and at 60°C. Th e green synthesis of spherical-shaped Ag NPs bio-fabricated from T. indicum with a face centred cubic structure showed average particle sizes of 20–50 nm, which is inconsistent with the particle size calculated by the XRD Scherer equation and TEM analysis. We further explored the larvicidal effi cacy of biosynthesized Ag NPs with leaf extracts of T. indicum against Mythimna separata. Th e results showed that Ag NPs (20–50 nm) of T. indicum possess good larvicidal activity against M. separata with an LC50 of 500 ppm. Th us, we can advocate that Ag NPs of 20–50 nm size extracted from T. indicum may be considered in the pest management programme of M. separata in future.
Źródło:: Journal of Plant Protection Research; 2017, 57, 2
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Biostable analogs of insect kinin and insectatachykinin neuropeptides: A review of novel classes of antifeedants and aphicides
Autorzy:: Nachman, R.J.
Smagghe, G.
Powiązania:: https://bibliotekanauki.pl/articles/55075.pdf
Data publikacji:: 2011
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: fluid secretion
peptidase resistance
biostable analog
insect
kinin
insecticide
neuropeptide
novel class
antifeedant
aphicide
pea aphid
Acyrthosiphon pisum
aphid
control agent
Opis:: Neuropeptides are regulators of critical life processes in insects, but are subject to rapid degradation by peptidases in the hemolymph (blood), tissues and gut. This limitation can be overcome via replacement of peptidase susceptible portions of the insect neuropeptides with non-natural residues or moieties to create analogs with enhanced biostability. Two neuropeptide families, the insect kinins and insectatachykinins, stimulate gut motility and Malpighian tubule fluid secretion in certain insects but unmodified members demonstrate little or no effect when fed to pea aphids (Acyrthosiphon pisum) in an artificial diet. Nonetheless, biostable analogs developed via the strategic introduction of either bulky Aib residues and/or β-amino acids demonstrate potent antifeedant and aphicidal effects when administered orally; whereas other biostable analogs are inactive. Although the precise mechanism of action has not been delineated, the activity may be associated with disruption of the physiological processes that these neuropeptides regulate in insects. The most active of the biostable insect kinin and insectatachykinin analogs show LC50 values of 0.063 nmole/μl (LT50 = 1.68 days) and 0.0085 nmole/μl (LT50 = 1.1 days), respectively; matching or exceeding the potency of some commercially available aphicides. The biostable analogs represent important leads in the development of alternative, environmentally sound aphid control agents.
Źródło:: Pestycydy; 2011, 1-4
0208-8703
Pojawia się w:: Pestycydy
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Development of thermotolerant isolates of Beauveria bassiana (Bals.-Criv.) Vuill. with ethyl methanesulfonate
Autorzy:: Wongwanich, Y.
Cobelli, P.
Boonchuay, D.
Wangsomboondee, T.
Powiązania:: https://bibliotekanauki.pl/articles/65516.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: thermotolerance
entomopathogenic fungi
Beauveria bassiana
ethyl methanesulphonate
brown planthopper
Nilaparvata lugens
pest insect
pest control
mutation
fungal isolate
molecular identification
pathogenicity test
Opis:: Beauveria bassiana is an entomopathogenic fungus that is widely used in Thailand to control pest insects. However, the increasing temperature has influenced the insect control efficiency of the fungus. Therefore, determination of thermotolerant isolates of B. bassiana that can grow and remain pathogenic at higher temperatures than its current optimum temperature may be a better way to control pest insects in a high temperature environment. Three isolates of B. bassiana obtained from the Rice Department, Thailand were selected for mutagenesis using ethyl methanesulfonate (EMS) with subsequent screening at high temperatures (33 and 35°C). In addition, the recovery of fungal growth after exposure to a high temperature for a period of time (5–15 days) and then transferring to 25°C was evaluated. No isolates were found that grew at 35°C but one mutant isolate (BCNT002MT) produced larger diameter colonies and more spores than the corresponding wild type (WT) at 33°C. Growth and spore production of the BCNT002MT isolate were greater than its WT when incubated at 25°C for 14 days following exposure to 33°C for 7 days. In addition, the spore germination level (%) of BCNT002MT was significantly higher than its WT during culture at 25°C after prior exposure to 33°C for 5, 10 and 15 days. The pathogenicity against the brown planthopper, Nilaparvata lugens (Stål), of this mutant isolate was also prominent.
Źródło:: Journal of Plant Protection Research; 2017, 57, 4
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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