Occurrence of fusarium wilt disease and pest population in IPM and Non-IPM fields of chilli Capsicum annuum L. in Andhra Pradesh
C Ruth, MN Bhat, HR Sardana, K Gopal and B Srinivasulu
An investigation was carried out on evaluation of different integrated pest management (IPM) modules against Fusarium wilt disease and pest complex of chilli for promotion of adaptable IPM Technology under wide area approach at Regadaguduru village, Velugodu mandal, Kurnool district, Andhra Pradesh. The number of IPM interventions were 16 as against 21 numbers of interventions in Non-IPM plot for cultivar Devanur Deluxe, whereas in case of Super-10 cultivar, it was 16 in IPM plots as against 21 in Non-IPM plots. The incidence of Fusarium wilt ranged from 10.85 to 21.82 per cent in IPM plot as against 9.94 to 23.96 per cent in Non-IPM plot. The incidence of wilt started late in the season by October and reached its peak by January. The average seasonal Fusarium wilt incidence was 16.41% in the IPM plots and 17.36% in Non IPM plots. During the year 2014-15. thrips and mites population, aphids and whitefly, the fruit borer complex viz; Helicoverpa armigera (Hub.), and Spodoptera litura (Fab) and natural enemies viz.,coccinellids, chrysoperla, spiders and predatory mites were counted in situ and expressed in terms of population per plant randomly selected twenty plants in each IPM and non IPM plots of both Devanur Deluxe and Super-10 cultivars. The IPM practices were applied in IPM plots and the pest population was monitored and recorded the observations. In the present investigation, in Devanur Deluxe the peak activity of thrips was noticed during October month with a mean population of 1.27 thrips per leaf in IPM plot while non IPM plot recorded a maximum of 2.64thrips per leaf. In September month IPM plot recorded 1.33 thrips per leaf while non IPM plot recorded 2.70 thrips per leaf, respectively similarly, in Super-10, the peak activity of 2.61 thrips per leaf was noticed in IPM plot and in non IPM plot it was 4.14thrips per leaf. Maximum peak recorded of mite 4.00 per leaf was noticed IPM plot during January while in non IPM plot. It was 3.61 mites per leaf in Devanur Deluxe. However in non IPM plot maximum mite population of 4.30 per leaf was noticed during January month. Similar trend was noticed in Chilli variety Super-10.There was negligible population of aphids and white fly was noticed in IPM and non IPM plot both in Devanur Deluxe and Super-10. Spodoptera activity was less in IPM plot of Devanur Deluxe and Super-10. The activity of fruit borer, H.armigera was noticed during December month in both IPM and non IPM plot and maximum larval incidence was noticed during October month in both IPM and non IPM plot of Devanur Deluxe 3.86 and 1.55 larval per plant. Similarly in Super-10 the peak activity of larval noticed at January month 2.66 and 6.90 larval per Plant. In both IPM and non IPM plots of Devanur Deluxe and Super-10 the per cent defoliation was negligible Maximum fruit damage of 6.34 per cent was noticed in IPM Plot of Devanur Deluxe while it was 11.19 per cent in non IPM plot. Predatory population viz., coccinellids and chrysoperla was more in IPM plot compared to Non-IPM plot.
C Ruth, MN Bhat, HR Sardana, K Gopal, B Srinivasulu. Occurrence of fusarium wilt disease and pest population in IPM and Non-IPM fields of chilli Capsicum annuum L. in Andhra Pradesh. J Entomol Zool Stud 2020;8(4S):08-15.