Sushma Kumaria*, Kapildeo Mahtob & Shiva Nand Singhc
aDepartment of Zoology, R N College, Hajipur, Bihar, India
bDepartment of Zoology, N N College, Singhara, Vaishali, Bihar, India
cUniversity Department of Zoology, BRA Bihar University, Muzaffarpur, Bihar, India
Received : 11th October, 2017 ; Revised :14th December,2017
Abstract: Tobacco caterpillar, Spodoptera litura is one of the important agricultural pests. It is widely distributed to the whole of the Asia, United States and oceanian lands i.e. Australia, New Zealand, Papua New Guinea. It is very common in tobacco farms in the North Bihar. The pest invasion in crop is observed with the presence of egg-mass covered with hair scales on the underside of young leaves. The young larval first feed gregariously the leaves, stems buds flowers etc and then older larvae spread out and may completely devour the leaves resulting in poor growth of plants. The leaves of infested plants have holes and become skeletonized leaves. In my observation the damage is done only by the caterpillar. The features of caterpillar and adult insect are similar as described earlier. The result of all the experiments conducted to know the influence of host plants on the effectiveness of SINPV against S. litura larvae revealed that there was a significant variation in the LC50 values among different host plants and it was lowest in cabbage and highest in castor. Similarly. LC50 values of SINPV screened against S. litura varied in different host plants.