Abstract:
The resistance levels of six cotton varieties viz. MNH-635, NIAB-86, SLH-257, CIM-446, CIM-482 and NIAB Karishma to sucking complex i.e. Thrips, jassids, and whiteflies were evaluated in the experimental field at Nuclear Institute for Agriculture and Biology (NIAB), Faisalabad. It was observed that the cultivar CIM-446 showed comparatively greater resistance to the attack of whiteflies (3.028 per leaf) and cultivar NIAB-86 was found to be highly susceptible to whiteflies 3.821 per leaf. Similarly NIAB-86, MNH-63 and SLH-257 were highly susceptible to jassid (i.e. 0.9689 per leaf, 0.8761 per leaf and 0.8678 per leaf, respectively). Whereas, the cultivar NIAB Karishma and CIM-482 showed medium response to jassid attack (i.e. (0.6911 per leaf and 0.6700 per leaf). The population of thrips illustrated that cultivar SLH-257 was found resistant to a greater level against this pest per leaf population basis (5.011 per leaf). It is observed that all the tested varieties were susceptible to the whiteflies, jassids and thrips. Although, the population of these pests remained below the economic threshold level except in case of jassids, whose population during 3rd and 4th weeks of July remained above the economic threshold level.
Page(s):
168-175
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Agriculture, Agricultural Engineering and Veterinary Sciences, Volume: 27, Issue: 2, Year: 2011