. Cooperative economic insect report. Beneficial insects; Insect pests. - 765 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES TWELVE-SPOTTED MELON BEETLE (Epilachna chrysomellna (F.)) Economic Importance: This coccinellid is rated second only to an armyworm (Prodenia litura) as a major pest of cucurbits in Egypt. Control measures are necessary in some years to save the crops, especially watermelon which is the favorite host. Considerable damage to melons also occurs in Algeria and other North Africa areas. In Israel and Jordan, serious losses occur on the plains but infestations are not seri
. Cooperative economic insect report. Beneficial insects; Insect pests. - 765 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES TWELVE-SPOTTED MELON BEETLE (Epilachna chrysomellna (F.)) Economic Importance: This coccinellid is rated second only to an armyworm (Prodenia litura) as a major pest of cucurbits in Egypt. Control measures are necessary in some years to save the crops, especially watermelon which is the favorite host. Considerable damage to melons also occurs in Algeria and other North Africa areas. In Israel and Jordan, serious losses occur on the plains but infestations are not serious in the hill regions where temperature seems to be a limiting factor. Heavy damage in untreated melon plantings was reported in 1957-58 from Iran. Infestations are seldom serious in consecutive years in South Africa and populations do not build up to damaging levels in France. Plant damage results from the feeding of larvae and adults on foliage, stems and fruits Distribution: Widespread in Africa, Southern Europe, Middle and Near East. Hosts: Principally a pest of cucurbits including watermelon, muskmelon, cucumber, pumpkin and other cultivated and wild species. Also reported from cotton, sesame, lettuce and General Distribution of Epilachna chrysomelina Life History and Habits: In Israel, adults emerge from hibernation in May. Egf are laid in clvisters of 50 or less on the lower surface of the leaves. Hatchini occurs in 3 to 5 days and the larvae begin feeding almost immediately, making re of transparent spots on the leaves. After 3 to 5 molts, pupation takes place oi the plants or other nearby objects. There are 5 generations annually. Adult activity ceases at the beginning of the rainy season. Feeding continues througl the winter on wild cucurbits in Egypt, however. During the crop season, both adults and larvae feed on fruits, leaves and other tender parts of hosts. The leaf tissue is consumed, leaving only the veins, much as with Mexican bean beet! Injured lea
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