Response of Various Brassica Genotypes Against Aphids Infestation Under Natural Conditions

This field experiment examined the ability of 15 brassica genotypes ( Brassica campestris and Brassica juncea ) to hold aphids populations and yield component. To investigate these trends, 2 years average of the collected data was computed. Data inferred that fluctuations existed within the tested genotypes for both the parameters under consideration. Aphids densities were the lowest on Agati Sarson (P) (7.51 aphids/plant) and the highest (38.96 aphids/plant) on TSA-1005/95. For grain yield, Agati Sarson (P) gave the highest yield (1908 g/3.5 m 2 ) (545 kg/hectare), and TSA-1005/95 yielded the lowest (847 g/3.5 m 2 ) (2420 kg/hectare). It was concluded that in case of infestation by aphids, the growth of foliage and fruiting bodies, as well as the over all yield of plants were negatively affected due to interference by this notorious pests.