Biology of a predatory bug Eocanthecona furcellata Wolff (Hemiptera : Pentatomidae) on Vapourer tussock moth larvae: a major pest of tasar silkworm food plants
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Tropical Tasar culture is forest and agro-based activity that covers agricultural and industrialactivity. Tasar silk is produced by the silkworm, Antheraea mylitta which is polyphagous innature. A large number of pests are reported to attack both the host plant as well as silkworm. As the rearing is conducted outdoor silkworms are exposed to attack of various pests duringtheir life cycle. Eocanthecona furcellata (Hemiptera: Pentatomidae) is the major predator oftasar silkworm during young age rearing. Both nymphs and adults of the stink bug suck theheamolymph of silkworm leading to death. The present work was undertaken to study the lifecycle of E. furcellata on larvae of vapourer tussock moth which is a major pest of tasar hostplants. The incubation period, nymphal duration and total developmental period from egg toadult was 8.0 ± 0.45 d, 16.0 ± 3.24 and 22.0 ± 4.20 d, respectively. Pre-oviposition, ovipositionand longevity of male and female stink bug was 3.20 ± 0.38, 17.60 ± 1.86, 42.40 ± 1.94,37.00 ± 3.18 d, respectively. Analysis of the data revealed no significant difference in life cycleof the predator when provided silkworm and vapourer tussock moth larvae as hosts. Whichclearly indicates that E. furcellata can multiply on vapourer tussock moth larvae during nonrearing periods. Adoption of recommended pest control measures for defoliators of tasar hostplants during non-rearing periods will help in reducing the incidence of host plant pests andalso in reducing the incidence of stink bug during rearing season. During the study it was alsoobserved that larvae semilooper, boll headed caterpillar and nymphs of leaf hopper serve asalternate/secondary hosts to E. furcellata during non rearing seasons
Abstract
Tropical Tasar culture is forest and agro-based activity that covers agricultural and industrialactivity. Tasar silk is produced by the silkworm, Antheraea mylitta which is polyphagous innature. A large number of pests are reported to attack both the host plant as well as silkworm. As the rearing is conducted outdoor silkworms are exposed to attack of various pests duringtheir life cycle. Eocanthecona furcellata (Hemiptera: Pentatomidae) is the major predator oftasar silkworm during young age rearing. Both nymphs and adults of the stink bug suck theheamolymph of silkworm leading to death. The present work was undertaken to study the lifecycle of E. furcellata on larvae of vapourer tussock moth which is a major pest of tasar hostplants. The incubation period, nymphal duration and total developmental period from egg toadult was 8.0 ± 0.45 d, 16.0 ± 3.24 and 22.0 ± 4.20 d, respectively. Pre-oviposition, ovipositionand longevity of male and female stink bug was 3.20 ± 0.38, 17.60 ± 1.86, 42.40 ± 1.94,37.00 ± 3.18 d, respectively. Analysis of the data revealed no significant difference in life cycleof the predator when provided silkworm and vapourer tussock moth larvae as hosts. Whichclearly indicates that E. furcellata can multiply on vapourer tussock moth larvae during nonrearing periods. Adoption of recommended pest control measures for defoliators of tasar hostplants during non-rearing periods will help in reducing the incidence of host plant pests andalso in reducing the incidence of stink bug during rearing season. During the study it was alsoobserved that larvae semilooper, boll headed caterpillar and nymphs of leaf hopper serve asalternate/secondary hosts to E. furcellata during non rearing seasons
참고문헌 (7)
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