National Academy of Agricultural Sciences (NAAS)
|
PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
We conducted a 2-year experiment in south India examining the effects of non-pulse intercrops (sunflower, sesame, sorghum, maize, marigold and okra) on the biocontrol services of predatory coccinellids on Aphis gossypii (Glover) in blackgram (cv. VBN 3). Blackgram + maize intercropping system significantly influenced maximum coccinellids on blackgram (4.67 adults/ plant) along with highest pest defender ratio (PDR) of 1: 2.31, occurrence ratio (OR) of coccinellids (1.43), minimum A. gossypii (5.48 nymphs and adults / terminal shoot), preference ratio (PR) of A. gossypii (1.10) and maximum BC ratio (1: 4.84). Blackgram with sunflower, marigold, sorghum, sesame and okra intercropping systems also effected for higher population of coccinellids; higher PDR and OR of coccinellids; and minimum A. gossypii and PR; and moderate BC ratios than blackgram alone (1.87 coccinellids/plant; 1: 0.37 PDR; 7.2 A. gossypii/terminal shoot; and BC ratio of 1: 2.11). Maximum coccinellids was also observed on maize with highest PDR followed by sunflower and marigold. Sorghum, sesame and okra had higher coccinellids. Olfactometer studies revealed the order of preference of coccinellids towards leaves and flowers as maize, sunflower, marigold, sorghum, sesame and okra.
Citations |
 |
 |
 |
 |
