Aphid Brevicoryne brassicae
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The age-stage, two-sex life table method was used for data analysis. The results indicated that EPF treatments affected the population growth rate of the aphids by causing prolongation of the development time, decrease in survival rate, shortening of adult longevity, and decrease in reproduction. The intrinsic rate of increase (r) and the finite rate of increase (λ) reflecting combined effects of all life history parameters were the highest in the control group and the lowest in M.
12p lyhuyenthu 31-01-2023 5 2 Download
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The study aims at comparing the preying potential of the four predator species and to ascertain their possible contribution to the suppression of the aphid pest, with the view of their of their potential use as bioagents.
11p nguaconbaynhay8 13-10-2020 10 1 Download
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Blackgram (Vigna mungo) is a major pulse crop grown in Tamil Nadu and leaf crinkle virus is an important disease that infects the crops at various stages of its growth, which reduce the yield drastically. There are conflicting reports on the transmission of ULCV by insects that includes aphids, leafhopper, whitefly and beetle. Hence, a study was carried out to identify the putative vectors involved in the transmission of the disease. Found that the virus was effectively transmitted by aphid vector, Aphis craccivora in a non-persistent manner and whitefly (Bemisia tabaci).
10p gaocaolon5 14-06-2020 7 0 Download
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Plants have developed a variety of mechanisms to counteract aphid attacks. They activate their defences by changing the expression of specific genes. Previously we identified an activation tag mutant of Arabidopsis thaliana on which Myzus persicae population development was reduced.
10p viminato2711 22-05-2020 14 0 Download
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Biology of big eyed bug, Geocoris erythrocephalus (Lepeletier & Serville) was studied oncabbage aphid, Brevicoryne brassicae (L.) at Centre for biocontrol laboratory, National Institute of Plant Health Management (NIPHM), Hyderabad during 2017.Studies showed the incubation period as 8.20 ± 0.42 days.
5p trinhthamhodang5 16-05-2020 11 0 Download
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Studies on seasonal incidence of aphid (Brevicoryne brassicae L.), infesting cabbage (Brassica oleracea var. capitata L.) work was carried out at College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.) during 2015-16 and 2016-17. The Brevicoryne brassicae L. damage was observed with a varying degree of infestation. The peak population of aphid, Brevicoryne brassicae L., was observed 172.5 / 20 plants and 140.45/ 20 plants in month of Febuary during both years (2015-16 and 2016-17), respectively.
6p quenchua4 06-04-2020 9 1 Download
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The study was carried out during 2015-2016 at College of Agriculture, Navile, Shivamogga by raising single radish plant per pot. Six levels of Nitrogen, i.e. 0, 50, 75, 100, 150 and 200 percent of recommended level of nitrogen per plant (225.00 mg N/plant) were applied twice, before sowing and two weeks after sowing. Sampling for aphid Brevicoryne brassicae (L.) was done at weekly interval.
7p cothumenhmong4 25-03-2020 7 0 Download
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The developmental time, survival rate and reproduction of the cabbage aphid, Brevicoryne brassicae (L.) (Homoptera, Aphididae), were evaluated on detached cabbage leaves (Brassicae oleracea var. capitata.
6p masterbarista 14-01-2019 25 1 Download