Biological control of Leucaena psyllid, Heteropsylla cubana Crawford (Homoptera:Psyllidae) in northern Thailand
1999
Charnnarong Doungsa-ard | Prapan Osatapan | Srifa Juepimai | Kalaya Krongjak (Maejo Univ., Chiang Mai (Thailand). National Biological Control Research Center. Northern Regional Center)
Biological control of leucaena psyllid, Heteropsylla cubana Crawford (Homoptera:Psyllidae) in the northern Thailand was conducted since 1991. Two introduced species of its natural enemies; the coccinellid predator, Curinus coeruleus Mulsant (Coleoptera:Coccinellidae) and the nymphal parasitoid, Psyllaephagus yaseeni Noyes (Hymenoptera:Encyrtidae) were used as control agents. Mass propagation and field released of these natural enemies were carried out and found that they were fully established and distributed in the release sites. Field minitoring and evaluation carried out during 1993 to 1996 revealed that C. coeruleus played an important role in controlling and reducing populations of H. cubana down to sub-economic level. P. yaseeni found to be low efficacy in suppressing H. cubana population but its population persisted throughout the investigation period. Strip-cutting the leucaena field enhanced the efficacy of C. coeruleus in controlling H. cubana in the adjacent strips.
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Эту запись предоставил Kasetsart University