Abstract
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 2 nd 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 31 st 2020
Highlights
Cotton Gossypium hirsutum L., is one of the most important fiber and cash crops of Pakistan, On a whole, Cotton is a major crop in parts of African tropics, Australia, China, Egypt, India, Mexico, Pakistan, Sudan, United States and warmer regions of central and South America (Bhatti and Soomro, 1996)
About eighty percent of all pesticides consumed in Pakistan are used on cotton fields (Siegmann, 2005)
Jassid population was slightly lower in Bacillus thuringiensis (Bt) Cotton control compared with NIAB-78 control
Summary
Cotton Gossypium hirsutum L., is one of the most important fiber and cash crops of Pakistan, On a whole, Cotton is a major crop in parts of African tropics, Australia, China, Egypt, India, Mexico, Pakistan, Sudan, United States and warmer regions of central and South America (Bhatti and Soomro, 1996). More than two thirds of cotton producers own someone all of their land, whereas one fifth are shared croppers with no field of their own. Earnings from cotton sales accounts for 40 per cent and 45 percent of the household income of landowners and sharecroppers, respectively. Among cotton farmers, 40 per cent of landowners and two thirds of sharecroppers are in the lowest two fifths of the consumption distribution. Households depending on sharecropping and selling labour for their livelihood include about one fifth of the rural population and have the highest incidence of poverty. Small and marginal farmers face risks due to the high incidence of pest infestation and the high financial and health hazards resulting from the use and overuse of pesticides for plant protection. About eighty percent of all pesticides consumed in Pakistan are used on cotton fields (Siegmann, 2005)
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