Beneficial insects not affected by Imidacloprid while feeding on aphids in maize cropping system
Zunnu Raen Akhtar, Ahmad Ali Anjum, Zain Saeed, Muhammad Ahmad, Abdullah Khalid
Insecticides can cause hazards to predator’s upto third trophic level in the eco-system. Aphids usually feeed on maize and its predator lady beetle feeds on aphids. Research was conducted in tritrophic interaction in which lady beetle adults were reared on aphids fed with maize. In these studies Imidacloprid was used to treat the maize at low, recommended and high dose. Whole of the experiment was repeated to observe mortality three times. Each time replications were similar. Results showed that, when treated with low, recommended, higher doses, imidaclporid showed mortality at all three concentrations. However, higher mortalities were caused at higher concentration. Results exclusively reveal that if lady beetle will feed on aphids which will be exposed by the imidaclporid in the fields will not result in reduction of population dynamics at large scale. Hence as conclusion, it is found that if we use imidaclporid at recommended dose, it will not affect upto third trophic level.