Wszystkie pola: functional response - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effects of azadirachtin, cypermethrin, methoxyfenozide and pyridalil on functional response of Habrobracon hebetor say (HYM.: braconidae)
Autorzy:: Abedi, Z.
Gharekhani, G.
Mehrvar, A.
Mahdavi, V.
Powiązania:: https://bibliotekanauki.pl/articles/66786.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:: Habrobracon hebetor Say is one of the most important natural enemies of the Helicoverpa armigera Hübner (Lep.: Noctuidae). In this study, the sublethal effects of LC30 concentration of azadirachtin, cypermethrin, methoxyfenozide and pyridalil on the functional response of H. hebetor to different densities of 5th instars larvae of Ephestia kuehniella Zeller were evaluated. Young females were exposed to LC30 of the insecticides for an appropriate time of exposure. Then, six randomly selected alive females were transferred individually to plastic Petri dishes (10 cm in diameter) and supplied with the following densities: 2, 4, 8, 16, 32 and 64 of 5th instars of E. kuehniella for 24 h. Eight replicates were considered for each insecticide treatment and the control. The results revealed a type II functional response in the control, and all of the insecticide treatments. This study showed that the control and the cypermethrin treatment had the shortest (0.4143 h) and longest (0.624 h) handling time, respectively. The highest (0.0035 per hour) and lowest (0.0029 per hour) attack rate was observed in pyridalil and cypermethrin treatments, respectively. Based on values of handling time, cypermethrin had the highest adverse effect on host-finding in H. hebetor.
Źródło:: Journal of Plant Protection Research; 2012, 52, 3
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Functional response of habrobracon Hebetor Say (Hym.: Braconidae) to mediterranean flour moth (Anagasta Kuehniella Zeller), in response to pesticides
Autorzy:: Mahdavi, V.
Saber, M.
Powiązania:: https://bibliotekanauki.pl/articles/66233.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:: The functional response is a behavioral phenomena defined as the relation between the parasitized host per each parasitoid and host density. This phenomenon can be useful in assessing parasitoid efficiency for the biological control of the host. Parasitoid wasps are most important insects and they play a significant role in the natural control of pests via their parasitism activities. In this study, the effects of diazinon and malathion were evaluated on the functional response of Habrobracon hebetor Say to different densities of last instar larvae of Anagasta kuehniella Zeller. Young adult females (< 24 h old) of the parasitoid were exposed to LC30 values of pesticides. Host densities of 2, 4, 8, 16, 32, and 64 were offered, to treated young females for 24 h in 10 cm Petri dishes. At this point, the parasitism data were recorded. The experiments were conducted in eight replications. The functional response was type Ш in the control and insecticide treatments. Searching efficiency in the control, diazinon and malathion-treated wasps were 0.008±0.002, 0.003±0.002, and 0.004±0.002 h-1, handling times were 1.38±0.1, 7.95±0.91, and 6.4±0.81 h, respectively. Diazinon and malathion had the highest and the lowest effect on searching efficiency of H. hebetor, respectively. After conducting advanced field studies, it was found that malathion may be used as a compatible chemical material with biological control agent in IPM programs.
Źródło:: Journal of Plant Protection Research; 2013, 53, 4
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The life cycle functional response of Rhopalosiphum padi (L.) to higher temperature: territorial expansion of permanent parthenogenetic development as a result of warmer weather conditions
Autorzy:: Strazynski, P.
Ruszkowska, M.
Powiązania:: https://bibliotekanauki.pl/articles/65775.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:: Bird cherry-oat aphid (Rhopalosiphum padi L.) is the most abundant aphid species on cereals in Poland. It represents approximately 80% of all cereal aphids. Its anholocyclic forms are the most important vectors of Barley yellow dwarf virus (BYDV). These forms are new among the Polish population of R. padi. Their changes in development are the result of higher temperatures. High spring and summer temperatures initiate a change in the run of R. padi’s life cycle, which begins to reproduce by means of permanent parthenogenesis. In autumn, this aphid does not fly back to the primary host but inhabits wild grasses. It is in autumn that winter cereals emerge. This results in what appears to be a new problem because this viral infection spreads in warmer environmental conditions.
Źródło:: Journal of Plant Protection Research; 2015, 55, 2
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Multi Response Optimization of the Functional Properties of Rubber Seed – Shear Butter Based Core Oil Using D-Optimal Mixture Design
Autorzy:: Onyekwere, O. S.
Odiakaose, C.
Uyanga, K. A.
Powiązania:: https://bibliotekanauki.pl/articles/381034.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: core oil
rubber seed oil
shea butter
aluminum casting
rdzeń olejowy
olej kauczukowy
masło shea
odlewanie aluminium
Opis:: In this study, rubber seed/shea butter oil was used to formulate core oil. The formulated core oil was characterised. D-optimal mixture design was used for multi response optimisation of the functional properties of rubber seed-shea butter coil oil. Desirable values for some responses might be obtained from a factor combination while for others responses not so desirable values. Through multiple response optimisations, a factor setting that gives the desirable values for all responses was obtained. The selected optimum mixture setting for the formulated core oil is 65.937% Rubber seed and 34.063% Shea butter oil at desirability of 0.924. Under the optimum condition the functional properties of the core oil was found to be 39.57KN/M2, 626.85KN/M2, 36.63KN/M2, 593.906KN/M2, 412.605 and 167.309s for Green Compressive Strength, Dry Compressive Strength, Green Tensile Strength, Dry Tensile Strength, Permeability and Collapsibility respectively. The optimum conditions were validated with less than 0.2% error. The functional properties of the formulated core oil was compared to the functional properties of linseed core oil. It was found that rubber seed-shea butter core oil can be used for producing cores suitable for Aluminium casting.
Źródło:: Archives of Foundry Engineering; 2017, 17, 4; 207-223
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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