They will also eat squash bugsand other garden predators. Beetle larva were chosen as a target subject because they are one of the key pests of asparagus (Morrison and Szendrei 2014), they are voracious feeders, easy to collect and handle, and co-occur with asparagus miner on field edges of post-harvest commercial asparagus fields (Ingrao et al. Jennifer Zavalnitskaya and Zsofia Szendrei, Michigan State University Department of Entomology - What I’ve found that works when hand-picking them is to have a container of soapy warm water on hand. Here’s some information about how to identify these two types. They grow to about 9 mm long and have three pairs of legs near the head and fleshy prolegs on most abdominal segments. The 4-H Name and Emblem have special protections from Congress, protected by code 18 USC 707. The first type is the common asparagus beetle, which is believed to have European origins. Asparagus beetles are voracious eaters, especially the larvae. They usually will fall right into your soap-water. Important natural enemies of asparagus beetles include a tiny parasitic wasp, Tetrastichus asparagi Crawford, which attacks eggs, and several species of lady beetles, which feed on asparagus beetle eggs and small larvae. The common asparagus beetle is mostly blue-black, but has cream-colored or pale yellow spots along its back, and an orangish or reddish border to its wings. The spotted asparagus beetle is orange with black spots. Preventing Problems: Remove old fronds and weeds from the asparagus patch in early winter and compost in an active compost pile. We found that asparagus beetles that overwinter in deciduous leaves or old asparagus stalks survive at higher rates compared to pine needles and bark. â¦ Two to five life cycles can happen in a year’s time, depending on the weather conditions where the plants are. Coming at them from the front or the sides seems to give them more warning and they can escape easier, but they don’t seem to see things coming from above as well. The common asparagus beetle is throughout the country. You might not be alarmed when you see the first couple asparagus beetles, but if they’re not dealt with quickly, you will have a perennial problem right along with your perennial vegetables. It should be relatively easy to see these eggs as they visibly jut out from the fern or spear, creating an almost spiky-looking line along it. We are continuing our research into asparagus beetle overwintering to learn more this upcoming winter. However, it really prefers the berries of the asparagus fern, and so it’s most likely to be found there where all of its nutrition needs are fully met. October 12, 2020. It can occasionally lay eggs on the flowers of these plants, and on occasion the larvae will snack on newly-forming melons or squash. common asparagus beetle is the more widespread of the two species. Where exactly are these beetles coming from? It has an aroma that keeps asparagus beetles away, and it can live in even the most nutrient-deprived soil, making it less of a competitor to the asparagus itself. Symptoms The adult beetles are 6-8mm long (about 1/4in), they are black with six yellow blotches on their wing cases and a reddish thorax Epic Gardening occasionally links to goods or services offered by vendors to help you find the best products to care for plants. Beetles and larvae also feed on asparagus fronds later in the season. Asparagus beetle adults feed on young shoots during the harvest season, chew holes in the shoots, and lay small, dark brown eggs standing on end on the spears. Lacewings and ladybugs find asparagus beetles delicious! 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