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Exploitation of aphelinid endoparasitoids, Encarsia sp. and Eretmocerus sp. and entomopathogenic fungi for the suppression of greenhouse whitefly

KrishiKosh

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Title Exploitation of aphelinid endoparasitoids, Encarsia sp. and Eretmocerus sp. and entomopathogenic fungi for the suppression of greenhouse whitefly
 
Creator REECHA
 
Contributor CHAUHAN, USHA
 
Subject ##Unable to generate tags g.balakoti-rhm-2010-03.pdf
greenhouse whitefly,Entomopathogenic f,ungi ,aphelinid endoparasitoids
 
Description ABSTRACT The present study entitled “Exploitation of aphelinid endoparasitoids, Encarsia sp. and Eretmocerus sp. and entomopathogenic fungi for the suppression of greenhouse whitefly” was carried out during 2008 and 2009 at Nauni, Solan, H.P. Two endoparasitoids viz. Encarsia sophia (Griault and Dadd) and Encarsia inaron (Walker) and one ecto-endoparasitoid, Eretmocerus delhiensis Mani. were identified and found parasitising the greenhouse whitefly infesting different ornamental plants (fuchsia, rose, sunflower, chrysanthemum, petunia and alstromeria), vegetable crops (tomato, cucumber, egg plant, French bean and pumpkin), strawberry, ashwagandha and milkweed. The mean parasitisation of E. sophia was maximum (3.02%) followed by Er. delhiensis (1.27%) and E. inaron (0.74%) from May to September on all the vegetable crops. The developmental biology of E. sophia was minimum on whitefly infesting fuchsia (13.73 days) and maximum on tomato (19.53 days) plants while that of E. inaron was minimum on tomato (17.90 days) and maximum on French bean (19.00 days). In Er. delhiensis, the duration of the development period was minimum on French bean (13.68 days) and maximum on fuchsia (15.30 days). The true intrinsic rate of increase (rm) of E. sophia was found to be higher on whitefly infesting fuchsia (0.183) than on French bean (0.171). This value for E. inaron on tomato was 0.111 while for Er. delhiensis on French bean it was 0.157. On comparing the efficacy of fungus under laboratory conditions, Verticillium lecanii gave maximum mortality (60.00 %) at 109 spore/ml on 15th day, whereas comparatively low mortality (31.25%) was observed with Paecilomyces fumosoroseus. The combination of V. lecanii with E. sophia was found to be effective and gave maximum mortality (78.33%) on 15th day when E. sophia was released after 3rd day of V. lecanii application.
 
Date 2016-07-23T10:09:28Z
2016-07-23T10:09:28Z
2010
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/69474
 
Language en
 
Format application/pdf