Host plant resistance of promising onion (Allium cepa) varieties against onion thrips Thrips tabaci Lindeman.

摘要

Four promising onion cultivars (Chiltan-89, Phulkara, Sariab Red and Swat-1) were evaluated against thrips infestation at the Vegetable Programme, National Agricultural Research Centre, Islamabad, Pakistan during 2004-05. Pest infestation was almost similar on all the cultivars. The thrips density was maximum on Swat-1 and minimum on Phulkara. However, Swat-1 proved to be tolerant of thrips with the maximum yield of 43.18 t ha-1, while Phulkara, which recorded the second highest yield (25.51 t ha-1), proved to be resistant..