Article Sidebar
Published:
Oct 27, 2020Keywords:
Article Details
For all accepted articles, authors will be requested to complete, a RJAS publishing agreement. An email will be sent to the corresponding author confirming receipt of the manuscript together with the journal publishing agreement. Copyrights for articles published in our journals are retained by the authors, with first publication rights granted to the journal. The journal/publisher is not responsible for subsequent uses of the work. It is the author's responsibility to bring an infringement action if so desired by the author. The findings, interpretations and conclusions reached in the report do not necessarily reflect the views of the Editor and /or the Editorial Board of RJAS.
Main Article Content
Efficacy of <i>Bacillus thuringiensis</i> var.galleriae Berliner and selected insecticides on cotton bollworm, <i>Earias vitella</i>
Abstract
Cotton, an important cash crop of tropical world, is attacked by many insects. Earias vitella is a major pest in winter crop.Bio-efficacy of B.t, var galleriae as Spicturin®, was evaluated in comparison with insecticides. Two field experimentswere conducted winter and summer seasons with the cotton cultivar LRA- 5166 to assess the efficacy of B.t. on Earias spp. in combination with the insecticides like endosulfan (0.035 %), quinalphos (0.025%), fenvalerate (0.01%) and diflubenzuron (0.075%),endosulfan (0.035%) in combination with B.t.g. @ 3 l/ha was found to be the best in reducingthe boll damage.The damage to the larva tissues is illustrated with thin sections of diseased larva after fixing in blackwax, microtomy sectioning and light microscopy. Cracks in gut lining, damage to gut lumen, epidermis and epithelialcells, basement membrane, musculosa , peritrophic membrane were observed and support the successful pathogenesisand mortality of treated larvae.
Keywords: Cotton, boll worm, Earias, Bacillus, squares, pathogeneis
