Abstract
Six onion cultivars (Red Creole, Chiltan-89, Local, Sariab Surkh, White Globe and Local Kandhari) were tested against thrips infestations to determine Varietal resistance against thrips infestation. The results of the trial showed that Thrips tabaci Lindeman (Thysanoptera: Thripidae). is the species attacking onion in the region. All the varieties were infested by thrips at various degrees. Local Kandhari followed by Sariab Surkh were the most susceptible to thrips infestation while Chiltan-89 was optimum. Maximum yield (11130 Kg ha-1) was obtained by Chiltan-89 and minimum (886.4 Kg ha-1) by Red Creole. Thrips population got its peak (15.42 thrips densities per plant) at 27.94 0 C and 36.33% relative humidity (RH) in the month of August.
MUHAMMAD FAHEEM MALIK, MUHAMMAD RASHID, JAVED IQBAL , ASIF AHMAD. (2010) RESISTANCE DETERMINATION AGAINST THRIPS OF PROMISING ONION VARIETIES IN THE AGROECOSYSTEM OF BALOCHISTAN, PAKISTAN , Punjab University Journal of Zoology, Volume 25, Issue (1&2).
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