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    Tytuł:
    Light-Trap Catch of Scarce Bordered Straw (Helicoverpa armigera Hübner) Depending on the Sunspot Numbers between Years 1993 and 2011
    Autorzy:
    Nowinszky, L.
    Puskás, J.
    Kiss, M.
    Keszthelyi, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1163578.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Helicoverpa armigera
    light trapping
    sunspots
    Opis:
    The study examined the light-trap catch of the Scarce Bordered Straw (Helicoverpa armigera Hübner) (Lepidoptera, Noctuidae) depending on the sunspot numbers. The catching data of examined species were taken from the light-trap registers of the Hungarian Light-trap Network. During the years between 1993 and 2011, 25,531 moths were caught by the 36 light-traps. Our results show that there is low Sun’s activity (the number of sunspots is between 0 and 30); there is no verifiable effect on the efficiency of light trapping of Scarce Bordered Straw. However, in other years, when the number of sunspots is between 30 and 100 and when it is higher than 100, high sunspot numbers cause an increase in the catch.
    Źródło:
    World Scientific News; 2018, 109; 263-266
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biological control of chickpea pod borer, Helicoverpa armigera Hubner (Lepidoptera: Noctuidae): A global concern
    Autorzy:
    Wubneh, Wasihun Yaregal
    Powiązania:
    https://bibliotekanauki.pl/articles/1192108.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    bioagents
    Cicer arietinum
    Helicoverpa armigera
    integrated pest management
    Opis:
    Chickpea (Cicer arietinum L.) is grown widely in the world because the seeds are rich source of protein for the rapidly increasing population. However, the production and productivity of chickpea have been experienced drastically because of biotic and abiotic stresses. It is vulnerable to a broad range of pathogens and the mainly severe pest being gram pod borer, Helicoverpa armigera. For the management of this serious pest, application of insecticides has several adverse effects on living organisms and the environment as a whole, the use of biological agents for chickpea improvement appears to be appropriate approach. Various studies by different scholars on the effect of different bio-agents against H. armigera have been carried out and found to confer resistance to pod borer. The use of Bacillus thuringiensis (Bt) based microbial insecticides have become an integral part of IPM approaches, particularly because these preparations provide an environmentally suitable alternative to the generally hazardeous broad-spectrum chemical insecticides. These bacterial insecticides like Nuclear Polyhedrosis Virus (NPV), which is target specific and exert no effect on beneficial organisms (e.g. parasitoids and predators). Most natural populations of H. armigera have at least some degree of infection by species-specific NPVs. When the degree of NPV infection can be enhanced, H. armigera larval population can be decimated, without deleterious effects on any other organisms. Various potentially effective parasitoids, like ichneumonid, Campoletis chloridae and Trichogramma spp., are found parasitizing eggs and larvae of H. armigera infesting chickpea. Various insectivorous birds and use of bird perches have long been observed to be effective predators of H. armigera larvae. Similarly various plant extracts have shown insecticidal properties and can be used effectively on field crops. Use of different bio-agents and botanicals having easy ways of formulation, cost effective, environmentally suitable and no or
    Źródło:
    World Scientific News; 2016, 45, 2; 92-110
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of host plant cultivar and nitrogen fertilization on life history of Helicoverpa armigera (Lepidoptera: Noctuidae)
    Autorzy:
    Salehi, F.
    Gharekhani, G.
    Shirazi, J.
    Vaez, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082784.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    age-stage two-sex life-table
    fertilization
    Helicoverpa armigera
    nitrogen
    Opis:
    The current survey was carried out to evaluate the effect of different nitrogen levels (0, 2.1, 3.0, 3.9 g ∙ pot–1 nitrogen as urea 46%) on tomato fruit worm Helicoverpa armigera on six common tomato cultivars (e.g., Kingston, Riogrand, Earlyurbana, Redston, Superstrain-B and Primoearly) under laboratory conditions [25 ± 1°C, 60 ± 5% RH, 16 : 8 (L : D) h]. The mortality, developmental period of immature stages as well as the longevity and fecundity of adult stages were recorded. Data were analyzed based on the age-stage, two-sex life- table theory. The longest (24.21 ± 0.59 days) larval developmental period was recorded in Earlyurbana variety with zero nitrogen level and the shortest (15.44 ± 0.36 days) in Superstrain-B variety with the highest nitrogen level. Consequently, the net reproductive rate (R0 ) ranged from 35.7 ± 7.06 to 62.16 ± 18.9 offspring/female/individual in Redston variety with zero nitrogen level and in Superstrain-B variety with the highest nitrogen level, respectively. The lowest and highest values of the intrinsic rate (r) and finite rate of increase (l) were estimated for Redston variety with zero level of nitrogen (0.0712 ± 0.0065 and 1.0732 ± 0.0069 day –1 ) and Superstrain-B variety with the highest nitrogen fertilizer (0.1507 ± 0.0057 and 1.1629 ± 0.0066 day –1 ), respectively. The results demonstrated that nitrogen fertilizer influenced nearly all the life parameters of the pest which depended on the cultivars. Finally, it could be concluded that Kingston and Superstrain-B were suitable and Earlyurbana and Redston were unsuitable host plant cultivars for H. armigera.
    Źródło:
    Journal of Plant Protection Research; 2020, 60, 2; 161-175
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preliminary studies on insect pest incidence on tomato in Bama, Borno State, Nigeria
    Autorzy:
    Mailafiya, D.M.
    Degri, M.M.
    Maina, Y.T.
    Gadzama, U.N.
    Galadima, I.B.
    Powiązania:
    https://bibliotekanauki.pl/articles/11694.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    insect pest
    Helicoverpa armigera
    Lepidoptera
    Noctuidae
    Bemisia tabaci
    Hemiptera
    Aleyrodidae
    Tetranychus
    Acari
    Tetranychidae
    Spodoptera littoralis
    infestation
    abundance
    tomato
    Bama Local Government Area
    Borno State
    Nigeria
    Opis:
    This study assessed the insect pest infestation of tomato during 2011 and 2012 in three localities namely Bula Kuliye, Kajeri and Soye of Bama Local Government Area, Borno State, Nigeria. Fifty plants were randomly checked per farmers’ field for insect pest recovery and count. Sampling was carried out in five to nine farmers’ fields per locality. With 38-52 %, 9-62 %, 13-39 % and 5-9 % species composition respectively across localities, Helicoverpa armigera Hubner (Lepidoptera: Noctuidae) followed by Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) were more predominant insect pests of tomato in these localities over Tetranychus sp. (Acari: Tetranichidae) and Spodoptera litoralis (Boisd.) (Lepidoptera: Noctuidae). Total proportion of infested tomato plants per farmers’ field ranged from 19-36 %, and was significantly higher in Bula Kuliye and Kajeri than in Soye. Total number of insect pests per plant/leave and bored fruits per farmers’ field fell between 2-5 and 21-35, and likewise, was higher in Bula Kuliye and Kajeri than in Soye. Although tomato plant infestation and fruit damage were found to be moderate or high in these localities, future studies on the bionomics or population dynamics of these insects remain essential for establishing their economic status.
    Źródło:
    International Letters of Natural Sciences; 2014, 05
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Artemisia annua L. essential oil on toxicity, enzyme activities, and energy reserves of cotton bollworm Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae)
    Autorzy:
    Mojarab-Mahboubkar, M.
    Sendi, J.J.
    Aliakbar, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/66788.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Artemisia annua
    essential oil
    toxicity
    enzyme activity
    energy reserve
    cotton bollworm
    corn earworm zob.cotton bollworm
    Old World bollworm zob.cotton bollworm
    Helicoverpa armigera
    Lepidoptera
    Noctuidae
    Opis:
    The essential oil of Artemisia annua L., a weed collected from northern Iran, was studied for its toxicity and physiological aspects on 4th instar larva of the cotton bollworm Helicoverpa armigera Hübner in controlled conditions (26±1°C, 65±10% RH and 16 L : : 8 D h). The artificial diet was used as a medium for investigating the toxicity and the effect of LC10, LC30, LC50, and LC90 on the feeding efficiency of 4th instar larva. The essential oil in doses of LC10, LC30, LC50, and LC90 were estimated to be 2.01%, 3.86%, 6.07%, and 18.34%, respectively. The activity of α-amylase, protease, lipase, general esterases, and glutathione S-transferase and protein, triglyceride, glucose for treated larva were measured. The results showed that all of these parameters were decreased compared with the control. Hence, A. annua essential oil is suggested as a botanical for controlling this important pest of field crops.
    Źródło:
    Journal of Plant Protection Research; 2015, 55, 4
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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