<p style="text-align: justify;">Applications of Helicoverpa armigera Nuclear Polyhedrosis Virus (HaNPV), Quinalphos, Bacillus thuringiensis kurstaki (Btk) and Beauveria bassiana (B.b.) as full doses gave hundred percent larval mortality to the test insect, 2nd instar larvae of Helicoverpa armigera. Treatment combinations containing half doses of HaNPV + Btk, HaNPV + B.b., HaNPV + Quinalphos, Btk + B.b., Btk + Quinalphos, B.b.+ Quinalphos, also gave cent percent larval death. &nbsp;Azadirachtin as half dose of application was found to be least effective (50%). However, all the treatment combinations were found effective over the untreated control.&nbsp;</p>


<p>Laboratory evaluation of certain bio-pesticides against the larvae of <em>Helicoverpa armigera </em>Hubner</p>


<div>The field experiments on efficacy of some biopesticides against H. armigera on pigeonpea under field condition was carried out in the experimental field of department of Entomology at International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) Hyderabad, during 2016-2017 and 2017-2018.These studies revealed Spinosad 45 SC treatment as the most effective against H. armigera. Lower larval population of H. armigera was observed when crop was treated with consortia of biopesticides which was at par with neem fruit powder followed by HaNPV. The treatment of Spinosad 45 SC was found significantly superior, recording lower pod and seed damage by H. armigera (6.82 %) &nbsp;followed by consortia (37.95%) and neem fruit powder (39.77%).The highest yield was (1359 kg/ha) recorded in Spinosad 45 SC followed by Streptomyces sp.(SAI-25) (762 kg/ha).</div>


<div>Efficacy of Some Biopesticides against <em>Helicoverpa Armigera</em> (Hubner) in Pigeonpea under Natural Condition</div>


<div>The study was carried out to evaluate bio-efficacy of some insecticides against Helicoverpa armigera (Hubner) in chickpea during rabi 2014-15 and 2015-16 at the Students&rsquo; Instructional Farm (SIF) of Chandra Shekhar Azad University of Agriculture and Technology, Kanpur. Minimum surviving and maximum reduction percentage of larval population was recorded in T5 (Spinosad 45 EC @ 166 ml/ ha), whereas maximum surviving and minimum reduction percentage of larval population was recorded in T1 (HaNPV @ 250 LE/ha) at 3rd, 7th and 10th days after spray. Significantly higher seed yield was obtained in case of (T5) Spinosad 45 SC (2550 kg ha-1 in 1st and 2680 kg ha-1 in 2nd year), respectively. Based on benefit: cost ratio of different treatments, (T5) Spinosad 45 SC ha-1 was found to be most economic insecticide, because it gave the maximum benefit as compared to remaining treatments.</div>


Laboratory evaluation of certain bio-pesticides against the larvae of Helicoverpa armigera Hubner

Efficacy of Some Biopesticides against Helicoverpa Armigera (Hubner) in Pigeonpea under Natural Condition

Bio-efficacy of Insecticides against Helicoverpa armigera in Chickpea