Interrelations between citrus rust mite, Hirsutella thompsonii and greasy spot on citrus in Surinam

摘要: Counts of citrus rust mite (Phyllocoptruta oleivora (Ashm.)) on leaves and fruit rose to a peak in the two dry seasons, build up taking 4-5 weeks. It then decreased partly through infection by entomogenous fungus Hirsutellathompsonii Fisher decline feed quality. The low counts wet seasons were associated with rain rather than humidity, temperature or infections H. thompsonii. Spraying suspensions fragmented mycelium thompsonii (mass concentration 0.5-1.0 g litre -1 ) prevented mite.The severity greasy spot (Stenella sp.) was positively correlated mite. Defoliation trees after high mite.Control (with chlorobenzilate: mass a.i. 2 at 500 ha warranted when 25% 15% bore least one per lens field (1.5 cm ). Greasy could be controlled preventing build-ups