. Cooperative economic insect report. Beneficial insects; Insect pests. INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES GRAY CORN WEEVIL (Tanymecus dilaticollis Gyllenhal) Economic Importance - This weevil is a serious pest of corn, sugar beets, cereal crops, and fruit trees. It is the principal pest of corn in Romania and annually threatens from 30 to 50 thousand acres in Bulgaria. Losses in sprouting grain have ranged from 50 to 100 percent in northern Turkey. It has caused extensive damage to corn and sunflowers in the and is one of the major pests of sugar beets in Romania and Hun
. Cooperative economic insect report. Beneficial insects; Insect pests. INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES GRAY CORN WEEVIL (Tanymecus dilaticollis Gyllenhal) Economic Importance - This weevil is a serious pest of corn, sugar beets, cereal crops, and fruit trees. It is the principal pest of corn in Romania and annually threatens from 30 to 50 thousand acres in Bulgaria. Losses in sprouting grain have ranged from 50 to 100 percent in northern Turkey. It has caused extensive damage to corn and sunflowers in the and is one of the major pests of sugar beets in Romania and Hungary. The adults have severely defoliated fruit trees in Turkey and Hungary. Hosts - The preferred hosts are corn and sorghum but it iias been recorded as feeding on 70 species of plants including sugar beets, wheat, potatoes, melons, sunflowers, peach, almond, and apple. Distribution - Southern , southern Europe, Turke^^ and General Distribution of Gray Corn Weevil Life History and Habits - This species overwinters as adults, buried in the ground at depths of up to 1 meter. They emerge in early spring and feed intensively for 1-2 weeks before mating and egg deposition begins. During this period they may strip the foliage from fruit trees and completely destroy fields of sprout- ing grain. The eggs are placed just beneath the surface of the soil, singly or in groups, and require from 10 to 12 days to hatch. Each female deposits about 60 eggs. The larvae feed on the roots of the host and often kill young plants. They require about 45 days to complete development and then pupate in the soil. The pupal stage lasts for about 3 weeks but the new adults do not emerge from the soil until the following spring. Coleoptera:Curculionidae No. 195 of Series - 413 -. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the origin
Size: 2035px × 1228px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectbeneficialinsects, booksubjectinsect
