What is in this article?:
- BMSB super pest a huge threat to agriculture
- Monitoring and insecticides
- Another new pest has arrived on the scene that has the potential to blow IPM programs out of the water, at least initially.
- The brown marmorated stink bug (BMSB) is not only a huge threat to California agriculture, but is also a nightmarish nuisance pest, gathering in buildings and around outdoor lights in such numbers that manure shovels and 5-gallon buckets are required to dispose of them. The insect has a strong, unpleasant odor when disturbed.
Monitoring and insecticides
Monitoring. No truly effective monitoring tools have been developed yet. Tall, baited pyramid traps placed on the ground are used for capture, and black and dark green have been found to be the most attractive to BMSB, probably because they resemble a tree trunk.
These traps catch far more than standard Asian traps placed in the canopy. The standard bait used is methyl decatrienoate, and whereas 50 mg lures are typical for standard stink bugs, trap catches increased up to 450 mg. Average catches of over 400 adults/trap/week were recorded; one trap had over 1,500.Because trap counts greatly increase late in the season, there is potential for attract and kill or mass-trapping strategies in late summer.
There is also potential monitoring with light and pheromones, as the aggregation pheromone has been identified.
Insecticides typically used for stink bug control are may not work as well on BMSB. In lab and field tests, Dr. Leskey has found that several neonicotinoids and pyrethroids knock down and paralyze adults but then they recover in the days following treatment. In lab tests, only the OP Lannate (methomyl) provided high mortality, and the pyrethroid Danitol (fenpropathrin) had 50 percent mortality. She also found that mortality of these products dropped dramatically when adults were subjected to treated and dried foliage. Since there is constant movement from adjacent areas, residual pesticide will be required for effectiveness. However, repeated use of such pesticides would kill beneficials and affect IPM programs.