Evaluation of Chrysoperla Carnea for Population Management of Jassid Amrasca Devastans in B.t. Cotton Crop

Abdul Samad Soomro


Evaluation of Chrysoperla carnea [Steph.], for the management of jassid in B.T. Cotton crop was carried out in Randomized Complete Block Design (RCBD) with 4 replications. There were four treatments: T1= Chrysoperla carnea (natural enemy), T2= Confidor (insecticide), T3= B.T. control and T4= NIAB-78(non Bt.) control plot. The treatments were applied at fortnightly intervals stating from 2nd week of June. The jassid population was found infesting cotton crop. The data showed that the maximum population (2.38jassid/leaf) was recorded in T4, whereas minimum jassid population (1.76jassid/leaf) was recorded in T2. Over all maximum mean population of C. carnea (0.39/plant) was recorded in T1 and the minimum population was recorded (0.06/plant) in T2. The maximum seasonal mean of bolls (20.84bolls/plant) was recorded in T4 followed by T2 (20.13bolls/plant).

DOI: 10.7176/ALST/77-03

Publication date: January 31st 2020

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ISSN (Paper)2224-7181 ISSN (Online)2225-062X

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