12
Jul
(Beyond Pesticides, July 12, 2023) A study by University of Delaware entomologist Thabu Mugala and colleagues finds that modifications to their farming methods can reduce slug damage when those changes also encourage natural slug predators, allowing farmers to avoid the endless cycle of pesticide dependency, pest resistance, genetically engineered crops, and synthetic fertilizers. With insects as the target for tens of millions of pounds of agricultural use, growers of the highest-production crops in the U.S., corn and soybeans, continue to find slugs to be a serious problem. Corn and soybean growers who have adopted no-till or conservation tillage and cover crops often think these practices worsen the problem by increasing moisture and decaying plant material in fields, which slugs love. But the cause-and-effect picture is more nuanced and requires strategies that nurture ecological balance. Slugs are the most damaging non-arthropod pest in no-till corn production in the U.S., and truly effective chemical deterrents do not exist at agricultural scale, as Beyond Pesticides noted here, although biological methods may be on the horizon, such as a parasitic nematode already used in Europe that shows promise. The most voracious natural slug hunters are ground beetles, but harvestmen (daddy longlegs), and wolf spiders […]
Posted in Beneficials, Biodiversity, Biological Control, slug, Uncategorized | No Comments »
25
Aug
(Beyond Pesticides, August 25, 2021) Scientists at Oregon State University have found a highly effective bait for slugs and snails: bread dough. Although not quite as exciting as the slug-liquefying nematodes the OSU research team published data on last year, bread dough has the potential to revamp mollusk management, particularly in developing countries where resources are limited. “Bread dough is a nontoxic, generic, and effective tool that could be used in the detection and management of gastropods worldwide,” said study lead author Rory Mc Donnell, PhD. “It represents a tool to aid in managing pest gastropod infestations, either using baited traps or in attract-and-kill approaches. It could also be incorporated into existing baits to improve their attractiveness.” Critically, bread dough was found to be a more effective bait than commercial attractants like the product Deadline® M-Ps™, which contains the hazardous compound metaldehyde. To test effectiveness, researchers began by making the bread dough using a combination of flour, water and yeast. In a lab setting, slugs were starved for 24 hrs, and then given the option of either bread dough or water (water was used as a control to test if the slugs were simply attracted to humidity). Researchers determined through […]
Posted in Alternatives/Organics, slug, snail, Uncategorized | 1 Comment »
08
Dec
(Beyond Pesticides, December 8, 2020) Researchers at Oregon State University recently made a promising discovery that could significantly improve the ability for North American farmers and gardeners to manage invasive, crop damaging slugs. It isn’t a pesticide, but a nematode (Phasmarhabditis spp.), a microscopic animal whose phylum contains potentially millions of different species. Oregon State researchers think they’ve found the specific type of nematode that will parasitize and kill Deroceras reticulatum, also known as the grey garden slug. The research underscores the critical importance of funding and supporting research on biological controls and other non-toxic pest management approaches.  Researchers were keyed into the potential to use nematodes for slug biocontrol by a product that has been successfully used in Europe for over 25 years, known as Nemaslug. However, the product is not registered in the United States by the U.S. Environmental Protection Agency (EPA). “The thought process is that if it works in Europe and we find it here and it works here, it might be easier to get it registered by the EPA,” study coauthor Rory Mc Donnell, PhD, said. “If we can provide evidence it’s native, that makes a strong case for developing it as a bio-control. […]
Posted in Agriculture, slug, Uncategorized | 1 Comment »
