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Asian Journal of Plant Sciences

Year: 2003  |  Volume: 2  |  Issue: 9  |  Page No.: 716 - 718

Evaluation of Promising Onion (Allium cepa) Varieties Against Thrips Infestation in the Agro-Ecosystem of Balochistan, Pakistan - I

Muhammad Faheem Malik, Mohammad Nawaz and Zahid Hafeez

Abstract

Six onion (Allium cepa L.) varieties (Red Creole, Chiltan-89, Local, Sariab Surkh, White Globe and Local Kandhari) were evaluated against thrips infestation in Quetta, Pakistan. The results of the trial revealed that Thrips tabaci Lindeman (Thysanoptera: Thripidae) is the attacking species to onion in the region. The said pest infested more or less all varieties. Local Kandhari followed by Sariab Surkh were the most susceptible to thrips infestation while Chiltan-89 was the least. Red Creole and White Globe were discarded due to their poor performance in terms of growth and yield. Both are short days varieties thus not suited to the region. Maximum yield (10750 kg ha-1) was obtained by Chiltan-89 and minimum by Sariab Surkh and Local Kandhari (2543 and 3418 kg ha-1 respectively). The population got its peek at 28.51°C in the month of August when maximum numbers of thrips per plant (17.55) were recorded. On the basis of the results onion variety Chiltan-89 is recommended for commercial cultivation in the region.

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