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Basil downy mildew has made recent headlines nationally as a new disease in North America as well as Europe. This is the first report of this disease on basil in Wisconsin. Brian Hudelson, plant pathologist at the University of Wisconsin in the Plant Disease Diagnostic Clinic, diagnosed downy mildew on basil. The best protection from these beetles are to cover the plants with row cover until the temperatures warm and the flea beetles begin to die back. In the early spring they will eat arugula, mustard, and broccoli into lacey skeletons. They damage a wide range of vegetables, riddling the leaves with small holes. Hind legs are enlarged, enabling the beetles to jump vigorously when disturbed. Most are dark with a smooth, shiny surface however, some are striped. The best protection from these beetles are to cover the plants with rowcover until the plants begin to flower.įlea beetles range in size from minute to more than 1/4 inch long. They can carry mosaic virus and will infect squash with the virus. They will eat the leaves of squash and cucmber leaves while the plants are getting established. They concentrate in squash and cucumber flowers. Given the scale of most of the gardens, it is most effective to monitor the plants and pick the beetles into glass jar of water and to destroy the egg masses as they appear.Ĭucumber beetles are yellow and black with stripes or spots. BT is effective against these pests, if applied at the correct time. They feed on potato leaves and can reduce the yield of potatoes. Otherwise the most effective control method is a combination of row cover and picking adults and larvae and destroying yellowish egg masses from the bottoms of leaves.Ĭolorado potato beetles emerge from the soil and crawl onto potato leaves to feed and lay their orange eggs on the underside of leaves. Wasps can be effective on these pests if the release of the wasps are time correctly and environmental conditions are favorable for the wasps. The larvae are yellow with Velcro like hairs. Mexican bean beetles resemble lady bugs, but they are orange with black spots.
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In order to control the plant the whole root must be removed. The roots for a tap root that can grow as deep as 3 feet below the ground surface. It’s best to plant horseradish in a pot in the ground to keep the roots under control.
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If not contained the roots of horseradish will spread rampantly and become a pest in the garden. If you must plant mint in the gardens, please plant it in a pot so that the roots stay contained. Mint has a shallow root system and will aggressively spread through your garden. Peppermint, Spearmint, and Catnip all have stems that have 4 sides. It has a long tap root that must be completely removed to eliminate the comfrey from regrowing and spreading. Comfrey grows in a mound it has long spade shaped leaves. Please do not plant comfrey in your plot. Wisconsin DNR invasive plants informationĬomfrey is planted for it’s flowers and medicinal properties. Please do your part to remove as much garlic mustard as you see by pulling the whole plant including the root before the flowers begin to form. Garlic mustard threatens the prairie species and other native understory plants in the areas surrounding the gardens. The garlic mustard emerges early in the spring and grows to be 3 feet tall with broad triangular shaped leaves with a white compound flower at the top of the spike. Garlic mustard is an invasive non-native plant that is related to mustard greens. Remove all the roots including the white stolons while double digging. Mulch will also help preserve soil moisture so you don’t have to water as frequently. A 6-inch mat of hay or leaf mulch will deter weeds from sprouting. Nothing beats adequately mulching your plot. Here are some commonly found pests found at the gardens and approaches to protect your garden from them. Eagle Heights Community Garden mandates organic control of weeds and undesired insects in the gardens.