Studies on Seasonal Population Fluctuations of Aphid Pests of Cabbage and Their Predators
Year: 2004
Type: article
Abstract: Studies on the seasonal population fluctuation of the aphid pests ofcabbage and their predators were undertaken in treated and untreated plots during I994-95 and 1995496 cropping seasons at Pantnagar, North India. In the insecticides treated plots, four sprays of monocrotophos (0.04%) followed by two sprays of endosulfan (0.05%) were given at IO days interval. Three aphid species namely Myzus and Brevicrnyne brassicne Linn. were found to attack this crop. However, M. percicae was the most abundant aphid species. The pcak population of M. persicue was recorded on February l9, I995 (445.6 aphids/S plants) and January 25, I996 (364.20 aphids/5 plants) in untreated plots, while in the treated plots, its peak population occurred on February,12 I995 (70.10 aphids/5 plants) and January ll, I996 (166.70 aphids/5 plants), respectively. The population fluctuation of other aphid species is also discussed. The peak predator population in the untreated plots was in mid-March (2.90 individualsl 5 plants), a month later than in the treated plots (0.90 individuals/5 plants). However, the overall mean predator population in the treated plots (0.32) was significantly lower than that in the untreated plots (L43) during l994-95 cropping season and it was on par during I995-96 cropping season.
Author: Anil K. Sood
Language: English
Subfield: Insect Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W2620536613