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Mohammad Monobrullah,Uma Shankar,Poonam Bharti,Rakesh Kumar Gupta,Virender Kaul 한국응용곤충학회 2007 Journal of Asia-Pacific Entomology Vol.10 No.2
The susceptibility of Spodoptera litura to SlMNPV infection was markedly affected by phytochemicals ingested during the acquisition of viral inoculum on foliage of tomato and cauliflower. The LD50 values computed for second, third and fourth instar larvae assayed on tomato leaves were 254, 819 and 23395 PIBs/larva, respectively whereas, it was 326, 1719 and 43843 PIBs/larva for respective instars when assayed on cauliflower leaves. Thus LD50 values for second, third and fourth instar larvae were 1.28-, 2.09- and 1.87- fold lower, respectively in tomato leaves. Similarly, LT50 values for second, third and fourth instar larvae assayed on tomato leaves were 7.1 and 7.5 days, respectively at inoculum dose of 2.7×104 PIBs/larva whereas, it was 7.7 and 8.0 days for respective instars when assayed on cauliflower leaves at same inoculum. This result also showed that the S. litura were more susceptible on tomato leaves in comparison to cauliflower leaves as the time required for mortality was lower in tomato leaves. The possible biochemical bases for differential level of mortality of S. litura larvae on tomato and cauliflower crops needs to be investigated.
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