TY - JOUR
T1 - Release of native Trichogramma minutum to control grape berry moth
AU - Nagarkatti, Sudha
AU - Tobin, Patrick C.
AU - Saunders, Michael C.
AU - Muza, Andrew J.
N1 - Funding Information:
This research was supported by a grant from the United States of America Department of Agriculture Viticultural Consortium – East (grant No. 99-34360-7382 to MC Saunders), and research gifts from the Lake Erie Regional Grape Program, the New York Wine and Grape Foundation, and the Grape Production Research Fund. We thank J Griggs and J MacGregor for their valuable field and laboratory assistance, R Morrison and S Penn of Beneficial Insectary for supplying T. minutum, and our departmental colleague M Barbercheck for her critical comments in preparation of the manuscript. We are indebted to grape growers in North East, Pennsylvania, whose vineyards were used for our study. PC Tobin acknowledges support from the US EPA Science to Achieve Results Fellowship Program (grant No. U-915534).
PY - 2003
Y1 - 2003
N2 - We studied the effects of inundative releases of the egg parasitoid Trichogramma minutum Riley (Hymenoptera: Trichogrammatidae) on economic injury by grape berry moth, Endopiza viteana (Clemens) (Lepidoptera: Tortricidae). Trichogramma minutum originally collected from natural host populations near North East, Pennsylvania, was mass produced in tobacco hornworm hosts and Mediterranean flour moth. We released T. minutum in border rows, where grape berry moth infestation is typically high, of experiment field station and commercial vineyards from 1996 to 1999. We recorded significant reductions in economic injury in plots where parasitoids were released. In vineyards with low to moderate grape berry moth abundance, four releases during the growing season were adequate in reducing damage at harvest to below 3%. In high-risk vineyards, T. minutum releases reduced damage to levels below 15%. The use of buckwheat as a cover crop to provide nectar in combination with parasitoid releases showed potential benefits in parasitoid activity. A biocarrier and Biosprayer™ were used in mechanized parasitoid-release operations, and no adverse effect on parasitoid emergence was recorded from parasitized eggs using this approach.
AB - We studied the effects of inundative releases of the egg parasitoid Trichogramma minutum Riley (Hymenoptera: Trichogrammatidae) on economic injury by grape berry moth, Endopiza viteana (Clemens) (Lepidoptera: Tortricidae). Trichogramma minutum originally collected from natural host populations near North East, Pennsylvania, was mass produced in tobacco hornworm hosts and Mediterranean flour moth. We released T. minutum in border rows, where grape berry moth infestation is typically high, of experiment field station and commercial vineyards from 1996 to 1999. We recorded significant reductions in economic injury in plots where parasitoids were released. In vineyards with low to moderate grape berry moth abundance, four releases during the growing season were adequate in reducing damage at harvest to below 3%. In high-risk vineyards, T. minutum releases reduced damage to levels below 15%. The use of buckwheat as a cover crop to provide nectar in combination with parasitoid releases showed potential benefits in parasitoid activity. A biocarrier and Biosprayer™ were used in mechanized parasitoid-release operations, and no adverse effect on parasitoid emergence was recorded from parasitized eggs using this approach.
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U2 - 10.4039/n02-099
DO - 10.4039/n02-099
M3 - Article
AN - SCOPUS:0347930521
SN - 0008-347X
VL - 135
SP - 589
EP - 598
JO - Canadian Entomologist
JF - Canadian Entomologist
IS - 4
ER -