PROBLEM OF LEAF CURLING OF TEAK SEEDLINGS IN FOREST NURSERY

  • P. B. MESHRAM R.K. VERMA P. B. MESHRAM AND R.K. VERMA FOREST ENTOMOLOGY DIVISION AND FOREST PATHOLOGY DIVISION, TROPICAL FOREST RESEARCH INSTITUTE, P.O. RFRC, MANDLA ROAD, JABALPUR - 482021, M.P. Corresponding author’s e-mail: pbmeshram1959@gmail.com
Keywords: Teak seedlings, Leaf Curling, Leafhoppers, Jassids, symptoms, Control measures.

Abstract

Leaf curling problem was observed in teak seedlings in forest nursery, Khakarapura (Hoshangabad, Madhya Pradesh). The symptoms like shortened inter-node, leaf roll, necrosis, puckering, mottling of leaf blade and gradual reduction in size were recorded. The teak seedlings were damaged by phytoplasmas and spread principally by insect of the families Cicadellidae (leafhoppers) which feed on the phloem of plants, ingesting phytoplamsa and transmitting them to the next plant on which they feed. On the basis of the nature of damage, the insect pest- jassids suck the sap from leaves. They cause characteristics hopper burn i.e. yellowing of leaves all along the leaf margin in the final stage of attack and  leaf becomes cup shaped. The incidence of leaf curling ranges from 39.00 to  77. 65 per cent were recorded in different beds and sectors. The possible control measures to encounter the present problem are: installation of light trap for collection of the jassids or use yellow sticky traps 50 nos./ ha ; spray combination like imidachloprid 17.8 EC @ 0.1% 0.5 ml or monocrotophos 36 E.C. @ 0.05% streptocyclin (plant antibiotic) 0.1%  1.5 ml per lit of water after 15 days interval and as a preventive measure, spray this combination in next year after rainy season for protection of teak seedlings.

 


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Published
2017-04-30