ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Seasonal occurrence of postharvest dried fruit insects and their parasitoids in a culled fig warehouse.

Johnson, J. A., Valero, K. A., Hannel, M. M. and Gill, R. F.

Journal of Economic Entomology Year: 2000 Vol: 93 Issue: 4 Pages: 1380-1390 Ref: 32 ref.

2000

บทคัดย่อ

Parasitoids of dried-fruit insects were surveyed at a culled fig warehouse in Fresno, California, USA. Three parasitoids of pyralid larvae were found: Habrobracon hebetor [Bracon hebetor], Venturia canescens, and at least one species in the genus Goniozus. Two parasitoids of pyralid pupae also were noted: Mesostenus gracilis and a new species of Psilochalcis. The latter is a new host association. Several beetle parasitoids were present, including Anisopteromalus calandrae, three species of Cephalonomia, Laelius centratus, and Cerchysiella utilis. C. utilis, a parasitoid of driedfruit beetle, Carpophilus hemipterus, is a new record for California. Most activity by parasitoids (detected by yellow flight traps) occurred directly above the fig mass. Pyralid parasitoids exhibited two peaks of seasonal activity; one in late summer through early fall, shortly after new figs were brought into the warehouse, and one in the spring H. hebetor generally attacked older host larvae, whereas V. canescens equal

ly attacked older and younger larvae, indicating that these two parasitoids may coexist by exploiting different portions of the host population. H. hebetor was active throughout the winter, suggesting that winter release of H. hebetor could be used to control diapausing pyralid populations in dried fruit and nut storage areas.