. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 50 CEREAL AND FORAGE INSECTS. OVIPOSITION. The process of oviposition, as carried on immediately after emer- gence and copulation, is short and rapid. The females crawl carefully over a head for a few seconds until they find a spikelet which presents the best adaptabilities for egg laying. Oviposition begins before the flowers appear and continues as long as the glumes remain flexible, probably from five to seven days. When the female has selected the spikelet she takes up a position upon the apex, her abdomen el
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 50 CEREAL AND FORAGE INSECTS. OVIPOSITION. The process of oviposition, as carried on immediately after emer- gence and copulation, is short and rapid. The females crawl carefully over a head for a few seconds until they find a spikelet which presents the best adaptabilities for egg laying. Oviposition begins before the flowers appear and continues as long as the glumes remain flexible, probably from five to seven days. When the female has selected the spikelet she takes up a position upon the apex, her abdomen elevated slightly above the tip, and immediately extends. Fig. 27.—Sorghum heads, showing four successive stages in the opening of the sheath or "; « (Original.) her ovipositor, pushing it within the spikelet until it is fully extended; then, with a rapid pistonlike motion, she places the egg. It is doubtful if more than one egg is deposited at a time by a single female in a given spikelet. Dissections of glumes observed to have been oviposited in by but one female, and but once, have not, during the writer's investigations, revealed more than one egg. However, it is no uncommon sight to observe several females follow one another in quick succession, ovipositing within the same spikelet. Numerous examinations of infested spikelets have revealed as many as ° See footnote, p. 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. Washington : G. P. O.
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