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George Mathew , Mathew P. Koshy , K. Mohanadas

Abstract

In a study on the insect pollinators of teak in Kerala, 17 species of. insects belonging to the orders Hymenoptera. Diptera and Lepidoptera were collected and identified. Maximum number of insects collected belonged to the order Hymenoptera. Among these, the solitary bees, Halictus sp., Prosopis pratensis and Allodope marginata were the most frequent visitors. None of the domesticated bee species was observed and this could probably be due to their absence in the vicinity. The possibility of enhancing pollination with the help of domesticated bee species needs to be explored.

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K. S. S. Nair ¹, Biju Babjan ¹, T. V. Sajeev ¹, V. V. Sudheendrakumar ¹, M. I. Mohammed Ali ², R. V. Varma ¹, K. Mohanadas ¹

Affiliations
1 Division of Entomology, Kerala Forest Research Institute, Peechi 680 653, Kerala, IN
2 Division of Plant Pathology, Kerala Forest Research Institute, Peechi, IN

Abstract

In the year 1993, a 100 tree plot in a 17 year old teak plantation at Nilambur in Kerala was experimentally protected from Hyblaea puera Cramer, a serious defoliator of teak plantations, using a naturally occurring baculovirus (HpNPV) reported earlier from this pecies. During the year, there were four major peaks of defoliator infestation from March to June. One-time foliar application of a crude preparation of HpNPV at the rate of 1x10⁵ POB/ml of the spray fluid, at the earliest sign of each infestation, gave 70-76 per cent protection of foliage during the first two infestations. A reduced foliage protection of 33-43 per cent obtained during the third and fourth infestations was attributable to occurrence of rain soon after application of the spray. In protected trees, the basal area increment was enhanced by 41 per cent, indicating the efficacy of HpNPV as a biocontrol agent against the teak defoliator.

Keywords

Baculovirus, HpNPV, Hyblaea puera, Teak Defoliator.

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