Abstract
An experiment was conducted at the research farm of Delhi University to study the impact of imidachloprid (chloronicotinyl insecticide) on the physico- chemical and microbial parameters of soil fertility along with nodulation in mung bean while using it as a seed treatment @ 140 ga.i./100 kg of mung seeds. Soil samples were collected from the control and imidachloprid treated mung bean field on the day of sowing (0 days) and after every 30 days till the time of harvesting (90 days) of the crop. Soil pH and organic carbon was not found to be significantly different for the control and treated field throughout the experimental period. Dehydrogenase activity was also not impaired owing to imidacloprid application in treated mung field. Soil microbial community structure studied through classical plate count method showed temporary inhibition of bacterial and actinomycetes population at the 60 days after the treatment. However, the fungal and Azotobacter population was not found to be impaired due to imidachloprid application. Furthermore, the nodulation was also found to be severely inhibited in the treated field as compared to control one and this inhibitory effect was irretrievable.
Get full access to this article
View all access options for this article.