Life table studies of green semilooper on soybean
2015
E13200
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Title
Life table studies of green semilooper on soybean
Publication Date
2015
Call Number
E13200
Summary
The present investigation entitled "Life table studies of green semilooper on soybean" was conducted in laboratory at Department of Agricultural Entomology, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola during kharif 2011-2012 to study the life table of green semilooper on soybean. Life table studies of green semilooper on soybean revealed that younger larvae (Ist to IIIrd instar) stage of green semilooper suffered highest during August and September due to fungal infection. There were 34 and 35.71 per cent mortality among younger larvae (Ist to IIIrd instar) during August and September, respectively. There were 33.33 and 29.62 per cent mortality among older larvae (IVth to Vth) instars during August and September due to fungal infection as well as unknown reason. There were 18.18 and 15.78 per cent mortality in pupal stage during August and September due to unknown reason. The Generation Survival of green semilooper was higher during September (0.33) than August (0.26) with trend index (0.70) during August. After 36th MW the population of pest was not observed in soybean field population therefore trend index during second month could not be worked out. The age specific key mortality was highest in younger larvae (Ist to IIIrd instar) during both months as 'k' value was highest i.e. 0.1804 and 0.1919 followed by older larvae (IVth to Vth) i.e. 0.1761 and 0.1526 and for pupae 0.0872 and 0.0746, adult 0.301, respectively in both months. The natural mortality in green semilooper was more as generation survival observed during both months studies was 26 to 33 per cent. Hence, it is necessary to observe early larval stages to adopt plant protection measures for the management of green semilooper.
Journal Citation
15(2):1139-1145, PLANT ARCHIVES
Contact Information
harvest@worldveg.org
Record Appears in
Research > Published Articles