Immediately after hatching the females start feeding for 10 days and then start laying unfertilized eggs. Black Vine Weevil: Monitoring and Control: MONITORING: Symptoms of adult feeding can be seen on leaf margins beginning in June. Females lay up to 500 eggs. In order to spot the signs of black vine weevils in your yard, it is helpful to understand a bit about this insect’s life cycle. The black vine weevil is an uncommon insect pest in Iowa. Females lay several eggs every day on nearby suitable host plants. Although, black vine weevil larvae lack the distinctive thoracic legs and are only slightly "C" shaped. Traps can also be made by placing fold of burlap around the base of the plant, or by creating a pitfall trap by burying a paper cup at soil level. Description of black vine weevils. The nocturnal adults can be spotted at night with a flashlight. LIFE CYCLE OF THE VINE WEEVIL When doing battle against a pest such as the vine weevil it's often useful to understand the life cycle which is summarised below. In bioassays with detached leaves, all three insecticides reduced feeding compared with control plants. What about the black vine weevil’s life cycle? Adult beetles cannot fly. In the United States, black vine weevils were first noted in 1835 in Massachusetts. A There are a range of options. Q What can I do to protect my plants from vine weevils? One interpretation of black vine weevil's life cycle is that egg-laying as late as September (my observations), and the ability of larvae to develop at temperatures below 11°C (Stenseth 1978), may be adaptations that permit larvae to develop at times of the year when soil temperatures are too cold for insect pathogenic nematodes to reproduce. Grains will have exit holes from the emergence of the adult beetles. A In a heated greenhouse, vine weevils can feed and breed throughout the year, so all stages of the life cycle can be found. Black vine weevil (Otiorhynchus sulcatus) Rough strawberry root weevil (O. rugosostriatus) Strawberry root weevil (O. ovatus) . It has been reported in only 8 Iowa counties. Almost all reports have come from homeowners who were bothered by the adult weevils appearing as accidental invaders inside the home between October and March. Eggs hatch in 8 to 20 days. Note that there are no male vine … Life Cycle: Female black vine weevil adults emerge from the soil in late-May to early-June. Q Is the vine-weevil life cycle different indoors? Includes. Q What can I do to protect my plants from vine weevils? They range in color from light gray to deep black. The adult black vine weevil is black with subtle white flecking, oblong, 3/8 of an inch long, and has a short snout. Adults dig their way out of the ground in mid-June and crawl up the plants to feed. Signs of a Rice Weevil. With … The life cycle of the black vine weevil consists of an egg, 6 or 7 larval instars, a pupal instar and the adult beetle. Black Vine Weevil: Monitoring and Control: MONITORING: Symptoms of adult feeding can be seen on leaf margins beginning in June.