Use pesticides safely and wisely; read and follow label directions. Contact the Plant Clinic (630-719-2424 or email@example.com) for current recommendations. Building the urban forest for 2050. Use up and down arrow keys to explore within a submenu. 0000022804 00000 n Cribate weevil adults are dark brown with longitudinal striations. Use up and down arrow keys to explore within a submenu. Both are about 0.5 inches (12.7 mm) long. 157 0 obj <> endobj xref 157 60 0000000016 00000 n From top level menus, use escape to exit the menu. Within a submenu, use escape to move to top level menu parent. One of the most destructive and widespread root weevils in the northern U.S. and Canada, the black vine weevil, can cause damage to susceptible plants at both the adult and larval stages of its life cycle. 0000009660 00000 n The following spring, after a short feeding period, the larvae pupate into adult beetles. The information given here is for educational purposes only. The Morton Arboretum is a 501(c)(3) nonprofit that relies on the generosity of members and donors. Black vine weevils are particularly troublesome pests of landscapes, marring plants, eating buds and even killing vegetation from the ground up. Amounts per 100 gal water (except where otherwise stated), using 400 to 500 gal solution per acre. 0000091686 00000 n They are flightless and nocturnal. 0000023385 00000 n The pesticide information presented in this publication is current with federal and state regulations. Weevils also feed on various weeds such as cocklebur, Joe-pye weed, morning glory or bindweed, ragweed, and thistle. They are small (1/2 inch long), white, C-shape… During the day, they hide in soil cracks, garden debris and mulch. The damage produced by the adult weevil is usually not serious, and is most recognizable by notched or crescent-shaped scars along the edges of the leaves or needles. Our trees. It will also attack strawberry, blackberry, blueberry, and cranberry plants, as well as azalea, rhododendron, hemlock, forsythia, and euonymus. Explore this online platform for Chicago-area residents to share their favorite stories about trees. 0000027078 00000 n 0000027516 00000 n It is in the larval stage that the weevil is most destructive by consuming tender feeder roots. UC IPM Pest Management Guidelines: Olive If left uncontrolled, a severe infestation of the black vine weevil may ultimately kill the host plant. Preharvest interval (PHI) is the number of days from treatment to harvest.
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