Drugstore beetles can eat a very wide range of materials such as flour, meal, dog food, and many types of processed food, but can also attack horn, wool, hair, pharmaceuticals and even book bindings. What do Drugstore Beetles eat?ĭrugstore beetles, Stegobium paniceum are also called biscuit beetles in many parts of the world. Treatment options for drugstore beetles includes freezing for 1 week, such as with these insect freezer treatment bags, or having a certified pest management specialist perform an anoxic treatment on the infested materials. Once an infestation is found, the infested materials should be sealed up and discarded or treated to kill the drugstore beetles. The adult beetles are also highly attracted to insect light traps and can be monitored using these devices.Ī visual inspection of dried food or spices in the vicinity of the pheromone traps or light traps containing the most beetles can reveal specific items containing larvae, pupae and adult beetles. Learn more about Japanese beetles and management that works.The use of pheromone traps for drugstore beetles can indicate their presence as well as where the beetles are coming from. While the masses of gleaming beetles are unsightly and the holey leaves they leave behind annoying, Japanese beetles aren't going anywhere and Minnesotans will have to learn to live with them. For your most prized plants, tap beetles off the plant and into a bucket of soapy water. Regardless of number or placement, the areas around the traps had more beetle feeding damage than if there had been no trap at all. One study investigated the impact of where traps were placed in terms of their number (one trap or multiple traps), location (near vulnerable plants or not), and wind direction (upwind or downwind from susceptible vegetation). ![]() Trap sellers may highlight how placement can make traps more effective. One study found that a trap placed alone led to nearby vegetation having more damage than in similar areas where no traps were placed. Studies have shown that traps lead to more plant damage in the areas they are placed. It is estimated that only 75% of beetles attracted to a trap end up in the trap, so in the end, you can be drawing large numbers of Japanese beetles to your area, while only capturing some of them. ![]() In trapping around the metro area, UMN researchers regularly captured hundreds (and occasionally thousands) of beetles a week. This may not seem like a big deal, but remember, in many areas of the state, Japanese beetles are abundant. Beetles end up both inside and outside the trap, and as large numbers of beetles congregate, they put off more pheromones that attract more beetles, whether they are in the trap or not. These smells travel through the air and the beetles pick up on the scent using their antenna, inviting the beetle to come on over. These lures may have the scent of flowers or the scent of beetle pheromones (sometimes both). Japanese beetle traps are baited with lures. What happens when Japanese beetles get together? They make more Japanese beetles. The question instead is, does your yard or garden benefit from putting up a trap? The answer is, most likely, no. In many areas of Minnesota, such as in the metro, Japanese beetles are abundant enough that we cannot trap the problem away. So yes, we know beetles are attracted to traps. What do we mean by this? It isn’t hard to find pictures of the lure-baited funnels and bags overflowing with beetles. ![]() While the University of Minnesota is still performing research to understand this pest, one thing we do know is Japanese beetle traps do not reduce beetle feeding. They like to feed on over 300 species of plants, and have a habit of congregating in large numbers. This invasive beetle spends the spring and late summer as a grub feeding on lawns, but in the middle of summer, adult beetles feed on leaves. Part of Japanese beetle trapping is disposing of hundreds of smelly, writhing beetles on a regular basis.Īfter spending the spring eating up lawns, Japanese beetle adults currently are or soon will be emerging across Minnesota.
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