Nature of Damage:
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Adult dark, ash grey in colour with fringed hind wings. First and second instar larva pale yellow but 3rd and 4th instar larva pinkish in colour. Full grown larva is 8-10 mm long. Transverse white coloured band between head and thorax. Pupa brick red in colour.
Generally larva makes the hole on upper portion of buds and feed inner content and makes the bud hollow (Feeding on ovary and petioles). After completing one bud, migrate to another bud. More than one larvae observed in a single bud.
Management:
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Three spray at 15 days interval starting from March with DDVP 0.03 %, Lamda cyhalothrin 0.005 % or Polytrin -C 0.044 % or Nurell-D 0.055 % are recommended.
Among microbial pesticides B.T 0.05 % found effective. Botanical pesticides like Nimbecidine 0.3 % or Azadex 0.1 % or Agrisef 5 % or Neemark 1 % are also found effective which can be incorporated to reduce the pesticide load. Installation of trap prepared from black tulsi (Ocium sp.) leaves extract @ one trap/two trees is useful for capturing the males of A. achrasella (500 g of tulsi leaves and one litre of water grind in electric grinder and filter through the fine cloth and then add 2 ml of Dichlorvos).
about 15-25 % parasitism by Phanerotoma sp. nr hendecasisella in larvae of bud borer and 15-20 per cent by Macrocentrus sp. in larvae of chiku moth is also observed. Variety PKM-1 (Perikulam) found tolerant against bud borer.