Population dynamics of Pyrilla perpusilla Wlk. and its parasite Epiricania melanoleuca Fletcher at Faisalabad [Pakistan]
2002
Rana, Z.A. (Ayub Agricultural Research Inst., Faisalabad (Pakistan)) | Mahmood, M.M. | Hashmi, A.A.
Studies on the population of Pyrilla perpusilla walker and Epiricania melanoleuca Fletcher were carried out at Faisalabad during March, 1987 to December 1987. Population of Pyrilla appeared in March, April and April while parasite in May, April and April at Ayub Agricultural Research Institute, Faisalabad, Chak No.6/JB and Chak No. 109/RB, respectively. Peak population of pyrilla and epiricania were recorded during August. Population of parasites were found to be increasing in proportion to that of its host. Highly positive correlations were found between the population of pyrilla and epiricania. The percentage parasitism ranged was recorded from a low level of 4.16 - 64.74, experimental areas respectively.
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