. Cooperative economic insect report. Insect pests Control United States Periodicals. - 986 - Studies in Romania indicated the following additional information: Adults were observed as early as March on alfalfa tips in warm weather. Also, the number of eggs oviposited ranged from 61 to over 1,000, with most females continuing to oviposit until they died. Egg and larval stages lasted 6-9 and 14-22 days at an average temperature of ° F., the latter period including a prepupal stage of 2-6 days. Pupation occurred in the soil at a depth of 2 inches and adults emerged after 5-9 days at the sam
. Cooperative economic insect report. Insect pests Control United States Periodicals. - 986 - Studies in Romania indicated the following additional information: Adults were observed as early as March on alfalfa tips in warm weather. Also, the number of eggs oviposited ranged from 61 to over 1,000, with most females continuing to oviposit until they died. Egg and larval stages lasted 6-9 and 14-22 days at an average temperature of ° F., the latter period including a prepupal stage of 2-6 days. Pupation occurred in the soil at a depth of 2 inches and adults emerged after 5-9 days at the same temperature. During hot weather, young adults reentered the soil after a short period of feeding and came to the surface only occasionally and for short periods before hibernation. Description: EGG - Newly laid egg yellowish-white or greenish-white, elongate, oval; shell reticulate and shiny. Older egg becomes transparent in appearance, with dark zone at anterior end. Egg changes shape markedly on fourth day, with a protrusion appearing just before hatching. LARVA - Newly hatched larva nearly white, but turns dark shortly. Length to 2-3 mm. Full-grown larva (fourth stage) yellowish with black spots; head black; prothorax dorsally with black plates divided by midline; meso- and metathorax with 2 rows of transverse dark sclerites (4 in each row) dorsally; first 6 abdominal segments also with 2 trans- verse rows of sclerites (6 in each row) dorsally; 7th abdominal segment with 2 thin, transversely elongate sclerites, flanked by smaller ones, dorsally; 8th abdominal segment with one transverse, elongate sclerite dorsally. (See illustra- tions below). Ventral surface of full-grown larva as illustrated below. Length 8-9 mm. PUPA - Yellowish-orange, mm. long. ADULT - Young adult uniformly yellow, with eyes and ends of appendages dark. Nine to fourteen-day-old adults dark yellow dorsally, with spots on thorax and elytra black; dark yellow with reddish tinge ventrally. (Pre
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