. Cooperative economic insect report. Insect pests Control United States Periodicals. - 22 - INSECTS. NOT KNOWN TO OCCUR IN THE UNITED STATES DURRA STALK BORER (Sesamia cretica Led.) Economic Importance: This phalaenid is considered an important pest of corn, broomcorn and sorghum in the Mediterranean area. Infestations as high as 90 percent have been reported in southern Italy. Attacked plants are weakened thereby reducing yield of seed. The sugar content of cane is also reduced. In the province of Trieste, S_. cretica is regarded as more important on maize than the European corn borer. This
. Cooperative economic insect report. Insect pests Control United States Periodicals. - 22 - INSECTS. NOT KNOWN TO OCCUR IN THE UNITED STATES DURRA STALK BORER (Sesamia cretica Led.) Economic Importance: This phalaenid is considered an important pest of corn, broomcorn and sorghum in the Mediterranean area. Infestations as high as 90 percent have been reported in southern Italy. Attacked plants are weakened thereby reducing yield of seed. The sugar content of cane is also reduced. In the province of Trieste, S_. cretica is regarded as more important on maize than the European corn borer. This pest is frequently intercepted at U. S. ports of entry in broomcorn from Italy, thus necessitating mandatory fumigation as a condition of entry. Hosts: Corn, broomcorn, sorghum, sugarcane and other grasses. Distribution: Algeria, Sudan, Egypt, Ethiopia, France, Greece, Italy, Iraq, Morocco, Spain and General Distribution of Durra Stalk Borer Life History: Observations on the biology of this species in Italy indicate it hibernates as a mature or nearly-mature larva in stalks of sorghum, broomcorn or corn. Adult emergence occurs in April and May. Eggs are deposited singly on leaves or in small batches, about 26 eggs per cluster under the leaf sheaths. On hatching, the larvae feed at first on the leaves than bore into the stalks or attack the ears. Pupation occurs usually in the stalks. Two generations a year are reported in Italy. Phalaenidae, Lepidoptera. 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. Bureau of Entomology and Plant Quarantine; United States. Plant Pest Control Branch; United States. Plant Pest Control Division; United States. Animal and Plant Health Inspection Service. Plant Protection and Quarantine Programs. Washington, D. C. : U. S. Dept. of Agriculture, Agricu
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