The sex ratio is equal, 1 female for every male. Larvae resume feeding on roots in the early spring, causing the heaviest damage. Clark, S.E. The black vine weevil Otiorhynchus sulcatus (F.) is the primary insect pest of field and container-grown woody ornamentals in the Pacifc Northwest (PNW). Life cycle Female vine weevils have the ability to reproduce by telotoky, a form of parthenogentic reproduction where offspring develop from unfertilised eggs, producing only females. Otiorhynchus sulcatus, an autopolyploid general-purpose genotype species? All Otiorhynchus sulcatus adults are female and each can lay several hundred eggs during spring and summer. Author information: (1)The James … It pupates inside the grain, and then emerges as an adult to start the cycle again. They are usually deposited in the soil or potting medium near the base of the plant. Hatching occurs in about ten days, and the larvae burrow and start an eating infestation in gardens. It hides during the day and moves about the plants at nightfall, biting deeply into the buds (*) and the leaves, lacerating the vine boughs. Description, Biology,
Life cycle of black vine weevils consists of egg, grub (larva), pupa and adult stages. They become active in spring, briefly feeding until they are fully mature. Adult weevils are hard-bodied, flightless, snout beetles (Curculionidae) about 1/2 inch long. Johnson In the Netherlands, the polyphagous pest Otiorhynchus sulcatus (F.) is especially injurious to strawberry, of which the larvae infest the roots and the adults are able to survive the winter either in the greenhouse or outdoors. Also, the period of egg laying is often protracted and, as a result, all stages of the pest may occur together. Eggs are white, round and 0.7mm in diameter. Oviposition and feeding behaviour by the vine weevil Otiorhynchus sulcatus on red raspberry: effects of cultivars and plant nutritional status Katherine E. Clarkâ,SusanE.Hartleyâ1, Rex M. Brennan, Katrin MacKenzieâ and Scott N2
Vegetables â seedlings For technical support please contact the CFAES Helpdesk. Otiorhynchus sulcatus (F.) The black vine weevil, also known as the taxus weevil, has become a serious pest in nurseries across the northern United States since its introduction from Europe approximately 150 years ago. Besides their environmental benefits, certain 'cruiser' entomopathogenic nematode species (also see below) have the additional capacity to search for their prey underground. FLORA OG FAUNA Udgivet af Naturhistorisk Forening for Jylland REGISTER . Otiorhynchus sulcatus F Vine weevil. 1992). en The life cycle of the obscure weevil is similar to that of the black vine weevil. Vine weevil (Otiorhynchus sulcatus) Nematode pests; Life cycle. The egg hatches into larva after 10 to 25 days. The full-grown larvae pupate in spring in the soil. The major root weevil species attacking mint is the strawberry root weevil, Otiorhynchus ovatus. However, the black vine, O. sulcatus , rough strawberry, O. rugosostriatus , and obscure root weevil, Sciopithes obscurus , also may be present in some mint fields. nemamax® gives excellent control against the black vine weevil Otiorhynchus sulcatus but is particular suitable to control other emerging pest species in the genus Otiorhynchus, like O. armadillo, O. salicicola and O. dieckmanni. At 27 °C or above, the reproductive success of O. sulcatus was substantially impaired, and the optimum temperature range was 21–22 °C. Females lay up to 500 eggs. Once mature, the larvae form pupal cells in the soil, and commence pupation. "Otiorhynchus sulcatus (Curculionidae) - the black vine weevil", "FruitDisease - Entomology, vine weevils", https://en.wikipedia.org/w/index.php?title=Vine_weevil&oldid=972267181, Creative Commons Attribution-ShareAlike License, This page was last edited on 11 August 2020, at 04:47. Otiorhynchus sulcatus Pest description and crop damage The flightless adult has a roughened hard-shelled appearance and is 0.5 inch long. Larvae can be controlled using parasitic nematodes, for example Steinernema kraussei and Heterorhabditis bacteriophora (a 'cruiser' species), which can be bought from some garden centres and by mail order. The life cycle has four distinct stages: eggs, larvae, pupae and adults. Life Cycle: Root weevils overwinter in the larval stage around the roots of the host plant. Find out how to get rid of beetles General The black vine weevil, Otiorhynchus sulcatus, is a pest in many ornamental crops (e.g. In late May and June the larvae will pupate for about 10 days. - Adult: it emerges in spring and lives on average 15 to 17 months. Life cycle … The adult weevil is matte black with fused wing covers, and is unable to fly. It provides control of black vine weevil larvae (Otiorhynchus sulcatus) present in soil or container-grown crops. Female weevils have the ability to reproduce parthenogenetically with fertilisation of eggs required to produce males, though no males have been observed. They are active night feeders and when disturbed, adults drop quickly to the ground. Otiorhynchus sulcatus (F.) (Coleoptera: Curculionidae) is one of the most serious pests of horticultural crops but despite this, the effects of temperature on its reproduction are not fully understood. Adults emerge from the soil in late spring and egg laying begins one to two weeks later. Anon., 1980. The depth where the pupae can be found varies between 2 and 20 cm.  They are simply mixed with water, and watered onto the soil. Acta Horticulturae, No. Learn more about the life cycle and damage symptoms of the black vine weevil (Otiorhynchus sulcatus). 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