ISHS Acta Horticulturae 446: VI International Symposium on Vaccinium Culture
EVALUATION OF THREE BIOINSECTICIDES FOR CONTROL OF LEPIDOPTERAN PESTS IN CRANBERRIES |
| Authors: | Hilary A. Sandler, J. Mason |
| Keywords: | integrated pest management, Bacillus thuringiensis, biological control |
| Abstract:
Three products containing the bacterium, Bacillus thuringiensis, were evaluated for control of lepidopteran pests on cranberry bogs in southeastern Massachusetts. Over a two year period, approximately 40 sites were treated with Agree®, DiPel® ES, or MVP®. Agree and DiPel ES were tested for control of cutworms and spanworms. MVP was tested for control of spanworms only. The target pests included gypsy moth (Lymantria dispar), blossomworm (Epiglaea apitae), false armyworm (Xylena nupera), green spanworm (Itame sulphurea), and brown spanworm (Ematurga amitaria). A single aerial application of any of the tested products reduced moderate populations below the action threshold at most locations. Substantial populations were reduced with one aerial application, but counts were not usually brought below the action threshold. One application of any of the tested materials injected through the irrigation system (chemigation) gave variable results. Best results were obtained with chemigation on smaller bogs (3.2 ha or less). | |
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