![]() ![]() Make sure they are alive when you when get them. It is best to apply the nematodes when grubs are present and when the soil temperature is above 50 degrees Fahrenheit. The first two are Heterorhabditis nematode products and the third a business that sells Heterorhabditis nematodes. Look on the Internet for ‘Heteromask,’ ‘Nemasys G’ or Buglogical Control Systems. ![]() If you order or purchase a live nematode product for grubs, make sure you buy a Heterorhabditis nematode and not a Steinernema or another type of nematode. Some people may want to consider a one-time treatment with a nematode that infects grubs: Heterorhabditis bacteriophora. Unfortunately, there are not any biological control products that you can purchase at the garden center that will give the same level of control as the standard insecticide products. Chlorantraniliprole applied in April will not work on spring grubs that are already present when it is applied. Apply chlorantraniliprole early (in April or May) for summer and fall grub control. There is one insecticide product in a different chemical class that will give a similar level of grub control: chlorantraniliprole ( Acelepryn). The standard, and highly effective, grub control insecticides are products that contain imidacloprid, clothianidin or thiomethoxam. For more detailed information, on this go to the Michigan State University Turf website and see the grub control bulletin posted there. These products do not work as well (maybe 50 percent control) as standard products applied in spring or summer to prevent grub damage the next fall and spring. However, Japanese beetles could become common in Petoskey over the next 10 years.īefore discussing alternative management strategies for grubs, it is important to understand that if grubs and turf damage are discovered in April, the only insecticides that will be effective in April are carbaryl (Sevin) and trichlorfon (Dylox). There are no scientific studies conducted at any university that I know of where the Milky Spore product that is now available provided adequate grub control.Īlthough Japanese beetles have been found near you in Petoskey, it is more likely that people in your area will have June beetle grubs or European chafer grubs.The milky spore pathogen may not be as virulent to Japanese grubs now as it was in the 1940s during the USDA biocontrol program.The bacterium in this product will only infect Japanese beetles and not any other species of grubs, while the most damaging grub to Michigan lawns is the European chafer.However, that is ancient history now, and there are three reasons why the Milky Spore product which can be purchased at garden centers may not be appropriate for a home lawn treatment: It was considered to be a successful effort because populations of Japanese beetle decreased 10-fold or more at most sites within five years of when the spore powder was distributed. ![]() According to Cornell University, the milky spore organism, Paenibacillus popilliae, was the focus of a huge Japanese beetle biocontrol program 60 to 70 years ago, with over 100 tons of spore powder distributed throughout Pennsylvania, Ohio and surrounding states where Japanese beetle occurred at the time. Our results so far agree with the results of a test conducted a number of years ago in Kentucky by C.T. We plan to continue this test for two more years. Unfortunately, the Milky Spore product you asked about did not provide any grub control in the first year of a test we are conducting at Old Channel Trail Golf Course near Ludington, Mich. Our customers are looking for alternatives to the chemical options (especially with the publicity concerning honeybees) and I am hoping to help them find some. Have there been any studies done on its effectiveness? Is the grub population here in northern Michigan likely to be other than from the Japanese beetle? Gabriel Laboratories and I am having a hard time getting the facts. We have had questions from our customers at our garden center here in Petoskey about the Milky Spore granular product by St. I thought others may have the same question. I received this email question about alternative grub control insecticides. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |