تلخیص
Five insecticides (Thiacloprid, Nitenpyram, Thiamethoxam, Acephate and Chlorfenpyr) were
evaluated against Amrasca devastans Dist. on farmer field located in Bahawalpur district at recommended
field doses. The treatments were applied on cotton crop when the jassid population was above ETL level.
The most effective insecticide found was Nitenpyram, having minimum population per leaf (0.35, 0.23 and
0.31 in 2018 and 0.53, 0.33 and 0.42 in 2019 after 1, 3 and 7 days of spray), followed by Chlorfenpyr both
years. However, Acephate was ineffective to control jassid population. Moreover, the order of percentage
population change/reduction is as under: Chlorfenpyr Thaimethoxam>Thiacloprid>Acephate. In addition to
this, economic analysis of both years exhibited the similar descending order/trend in benefit cost ratio (BCR)
as above. So the conservative strategies of using non-selective and conventional insecticides for the control
of sucking fauna, especially against jassid, must be transformed / amended to most selective insect growth
regulators (IGR’s) and new chemistry insecticides, that are safe and harmless for nature and environment.
Faisal Hafeez, Asad Aslam, Ayesha Iftikhar, Afifa Naeem, Muhammad Faheem Akhtar , Muhammad Jawad Saleem. (2020) Field Evaluation and Economic Assessment of Different Insecticides against Cotton Jassid, Amrasca devastans Dist., Journal of Innovative Sciences, Volume 6, Issue 1.
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