Abstract
Cotton is an important crop for the Pakistan and in the globe too. Thus, to access the availability
of biological fauna over a year, a study was designed. The study was carried out Research Farm of MNSUniversity of Agriculture, Multan, Department of Entomology, Faculty of Agriculture & Environmental
Sciences during 2018. In the study, population of beneficial insects was corelated with the weather parameters
(temperature, humidity and rainfall on two cotton genotypes; Bt (MNH-992) and Non-Bt (Cyto-124). The
four natural enemies i.e. ladybird beetle, green lace wing, syrphid fly and spider were studied. The population
of the natural enemies remained active throughout the studied period. The population of green lace wing and
ladybird beetle were maximum in June to September, respectively. The study showed that green lace wing
and ladybird beetle showed positive correlation with temperature while negative with rainfall. While, spider’s
population showed negative correlation with all-weather parameters except sunshine hours. The population
of spider was maximum in last week of September while disappeared in the last week of October. The study
revealed that the natural enemies were observed rarely in month of May, early stage of crop. The study resulted
that weather parameters like temperature, humidity and rainfall play significant role in fluctuation of natural
enemies.
Muhammad Ramzan, Faisal Manzoor, Unsar Naeem-Ullah, Ghulam Murtaza, Mirza Abdul Qayyum. (2019) Population Dynamics of Natural Enemies and their Correlation with Weather Parameters in Cotton, Journal of Innovative Sciences, VOLUME 5, ISSUE 1.
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