1a.Objectives (from AD-416):
The objectives of this project include: (1) maintain a brown marmorated stink bug (BMSB) colony; (2) evaluate currently registered insecticides against BMSB adults, nymphs, and/or eggs; and (3) evaluate alternative insecticides including those appropriate for conventional and organic orchards.
1b.Approach (from AD-416):
The BMSB has emerged as an extremely destructive pest of tree fruit throughout the mid-Atlantic. Many compounds typically used as cover sprays in tree fruit management programs have not provided reliable control of BMSBs. The intent of this work will be to identify insecticides that are effective against BMSB in order to develop management programs that are effective against BMSB in tree fruit orchards.
Insecticide products were evaluated in the laboratory bioassays for their toxicity against brown marmorated stink bug (BMSB) adults. Adults were collected from various overwintering sites, taken to the laboratory and held in a growth chamber until they started active feeding. Only laboratory-conditioned adults were used for the insecticide bioassays. Adults were treated with a topical application of water solution containing formulated insecticide. Each individual BMSB adult received 2 ul drop on the upper dorsal surface of the exoskeleton. The concentration of each insecticide solution was determined as equivalent of the recommended field rate of the product. A biological surfactant, Triton-X 100, was also added to each solution (1 ml of surfactant per 100 ml of solution). Water only plus surfactant was used as a control treatment. The mortality of BMSB was assessed at 4, 24, 48, 72, 96 and 120 hours after the application. During each evaluation, each individual insect was scored as either live, dead, or moribund. The results of the bioassays were made available to stakeholders throughout a series of meetings and extension publications presented throughout 2011-2013.