![]() The soil temperature must be 65 degrees or above for the treatment to work.Grubs must ingest the bacteria and be infected by it. The treatment can take time before you see noticeable results.The Cons of Milky Spore TreatmentWhile milky spore treatment can be effective for Japanese beetle grub control, it has some downsides. Milky spore disease remains in the soil for years, so a repeat treatment isn't needed for several years. They have to ingest it-and it may be weeks, months or even a few years before you see noticeable results. Milky spore doesn't kill grubs instantly. If using a hose, make sure it is on the gentle setting.īe patient. You want the powder to soak into the soil and not wash away. How To Apply Milky Spore DiseaseApply 1 teaspoon of milky spore powder every 4-feet in a grid pattern in your lawn. In most areas, the best time to apply milky spore is in late summer to early fall. When To Apply Milky Spore Disease?Because grubs must ingest the milky spore bacteria, milky spore powder should be applied when the grubs are most actively feeding-and when soil temperatures are 60-70 degrees F. Another sign may be birds, including robins and crows, and raccoons hunting and digging for Japanese beetle grubs in the lawn. The turf may also have a spongy feel to it. The Japanese beetle grubs feed on grass roots, causing the grass to brown and die.Ĭommon signs of grub infestation are dead patches of grass. Because they live in the soil, most people discover grub infestations by the damage that they do. What are grubs and how do I know I have them?Japanese beetle grubs are soft-bodied, c-shaped, off-white and up to 1 inch long. Read below to learn more about what is milky spore, milky spore treatment, how to apply milky spore powder and other tips for milky spore grub control. When grubs ingest the milky spore bacteria, they die from the infection. Milky spore, also called milky spore disease, is a naturally occurring organism in the soil. Not Allowed: A few of the products we list are not allowed for organic production but we think they have a place in sensible agriculture and can be used when certification is not an issue.Grubs of Japanese beetles can wreak havoc on turf grass-and several natural control methods are available. Has not been reviewed by a certifier, but the active ingredient is allowed. Check with your certifier.ĪYC: Ask your certifier. Nat’l List: One-ingredient products on the NOP* List of Allowed Substances (subpart G of the Organic Foods Production Act, sections 205.601-606). MOFGA has indicated that they will accept products on this list for their certification program. WSDA: Listed by the Washington State Department of Agriculture’s Organic Certification division for use in organic agriculture in Washington State. Allowed for use on MOFGA-certified farms. MOFGA: Reviewed and approved by the Maine Organic Farmers & Gardeners Association Certification Services. Most state certifying agencies, including MOFGA, accept OMRI approval. OMRI: Organic Materials Review Institute. Inoculants, soil amendments, fertilizers, livestock supplies and pesticides are labeled as: A product being labeled here as allowed is not sufficient to meet standards for organic certification.Ĭlick here for more information and the complete text of the rule. USDA NOP rule concerning disease and pest controlĬaution certified-organic growers:Before using any of these products for pest or disease control, you must have followed the National Organic Program rule 205.206(e). ![]() ![]() Contact information is provided for states that don’t participate in the website.Ĭlick here for a chart summarizing the safety of these pesticides for pollinators. You can look up products by name, registration number or active ingredient. Purdue University has a searchable database of information for most states. We cannot ship a pesticide to a state where it is not registered.īefore buying or using any pest- or disease-control product, be sure it is registered for use in your state and, if you are a commercial grower, registered for commercial production. Like alcohol and open-carry laws, pesticide registrations are different everywhere. Is that pesticide registered in your state?Each state treats potentially dangerous items differently. We welcome your suggestions about successful low-impact pest-control methods or products. Use our Sprayers to apply these products. While we try to stay current with product specifications, product formulations are subject to change without notice. Contact us in case you don’t receive the attached booklet or if the label is illegible. These products come with detailed instructions on their labels.
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