. Cooperative economic insect report. Beneficial insects; Insect pests. - 431 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES MELON WEEVIL (Baris granulipennis (Tournier)) Economic Importance: The species, first described from Egypt, is a serious pest of watermelons, melons and cucumbers in Israel. Occasionally, heavy populations occur in Egypt. A 10-percent infestation of watermelons has been reported from Afghanistan. Ovipositing females cause economic damage by girdling the stem ends of fruit. As a result, fruit development is stunted. Larval feeding within melons may cause malformation o
. Cooperative economic insect report. Beneficial insects; Insect pests. - 431 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES MELON WEEVIL (Baris granulipennis (Tournier)) Economic Importance: The species, first described from Egypt, is a serious pest of watermelons, melons and cucumbers in Israel. Occasionally, heavy populations occur in Egypt. A 10-percent infestation of watermelons has been reported from Afghanistan. Ovipositing females cause economic damage by girdling the stem ends of fruit. As a result, fruit development is stunted. Larval feeding within melons may cause malformation or shriveling. At times attacked fruit dries on the vine. Distribution: Egypt, Iran, Israel, and Afghanistan (specimens deter- mined as probably B. granulipennis). Hosts: Watermelons, melons and General distribution of Baris granulipennis (Tournier) Life History and Habits: In Israel, overwintering adults appear near the end of May or early June when the first fruits develop. The female gnaws small cavities in the peel and places one egg in each, but may deposit many in one fruit. Incu- bation requires 3 to 6 days. Upon hatching, the larva goes deeper into the fruit where it feeds on the pulp and soft seeds. When summer temperatures reach above 30°C, the larva may complete its development in 12 to 14 days. However, the larval stage may vary if conditions are unfavorable. Larvae usually attack young soft fruit from the size of a walnut to that of a grapefruit. Pupation takes place within a cocoon in the pulp of the fruit. The adult emerges in about 12 days. There are 2-3 generations a year in Israel. Coleoptera: Curculionidae No. 165 of Series. 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 original United States. Animal and Plant Health Service. Plant Protection and Quarantine Programs; United S
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