Seasonal abundance of tea leaf roller and aphid along with the incidence of their natural enemies in tea fields of Manipur.
Field studies were conducted during 2004-07 to evaluate the seasonal abundance of leaf roller (Caloptilia theivora) and tea aphid (Toxoptera aurantii) and their natural enemies in tea fields of Manipur, India. Out of 400 bushes marked for the study, 10 bushes were randomly selected for sampling at fortnightly intervals. C. theivora was found to infest tea from June to December. T. aurantii was found to attack tea crops from March to October. The seasonal abundance of predators (such as syrphids, coccinellids and neuropterans) synchronized with the incidence of the leaf roller and aphids.