Field Evaluation of Advanced Cotton Genotypes Against Insect Pest Complex in Agro-Climatic Conditions of Tandojam, Sindh
Field Evaluation of Advanced Cotton Genotypes Against Insect Pest Complex in Agro-Climatic Conditions of Tandojam, Sindh
Muhammad Usman Asif*, Raza Muhammad, Waseem Akbar, Mubasshir Sohail and Muhammad Awais
ABSTRACT
The resistance levels of eighteen cotton genotypes to sucking complex (thrips, jassids, and whiteflies) and bollworms (spotted and pink) were assessed in the experimental field of Nuclear Institute of Agriculture, Tandojam. The experiment was conducted under Randomized Complete Block Design (RCBD) with three replications. The result of overall mean revealed that NIA-M-20 had comparatively greater resistance to the attack of jassids (0.21/leaf) whitefly (0.29/leaf) and thrips (1.63/leaf). Similarly, NIA-M-16 also showed the lowest infestation of whitefly (0.29/leaf). Whereas, infestation of bollworms illustrated that NIA-M-20 was highly susceptible against spotted and pink bollworms with percent infestation of 5.52 and 2.79%, respectively. The genotype NIA-HM-27 proved to be most efficient by rendering the lowest (0.82%) infestation of spotted and pink bollworm but showed medium response and found susceptible against jassid (0.28/leaf), thrips (2.21/leaf) and whitefly (0.31/leaf). Best yield performance (2467.8 kg/ha) was of NIA-HM-6N that showed high tolerance against sucking pests as well as bollworms. Moreover, the perusal of data showed that the population trend of all insects remained below economic threshold level (ETL) during the period of study.
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December 2018
Vol. 4, Iss. 2, Pages 83-135
