Association of Eutectona machaeralis Walker with teak and other plants in North Bihar.

摘要

Diagnostic surveys were conducted during 2000-01 in Bihar, India, to record the association of Eutectona machaeralis on the different growth stages of teak (Tectona grandis) and other plants. Infestation by the different larval stages varied from 7.0 to 35.0%. Pest infestation under nursery conditions ranged from 10.0 to 17.0%. Foliage infestation on teak under different plantations varied from 7.0 to 35.0%. Among the immature to over-immature teak trees, the leaves of pure mature stands were most infested (35%) followed by young boundary plantations (18%) and mixed young plantations (16%). The pest was distributed throughout northern Bihar and affected approximately 100 plant species (80 woody and 20 non-woody) belonging to 45 families. The percent association of the pest in different families on an average ranged from 4.2 to 16.7. The percent association of the pest varied from 8.3 during March-April to 16.7% during July-August. There was no pest association on any plant during October-February..