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ARS Home » Research » Publications at this Location » Publication #132655
Title: PINK BOLLWORM: DIAPAUSE LARVAL EXIT FROM HARVESTED IMMATURE COTTON BOLLS AND PERCENTAGES SURVIVING TO MOTH EMERGENCE

Author
item Henneberry, Thomas
item Jech, Lynn

Submitted to: University of Arizona Agricultural Experiment Station
Publication Type: Experiment Station
Publication Acceptance Date: 5/1/2002
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Pink bollworm (PBW), Pectinophora gossypiella (Saunders), diapause larval exit from immature green bolls and larval and pupal mortality after exiting bolls, were studied at Phoenix, AZ in the insectary. Diapause larvae exited immature bolls sporadically during January, February, and early March. Thereafter, exit from the bolls was more consistent and highest numbers emerged in late April, May or early June. Larval and pupal mortality were high during January to early February and March, decreased in mid-March through early June, and increased again in mid-June to early August. Larvae remained in immature bolls as long as 319 days after harvest. Moth emergence was significantly correlated to accumulated heat units (12.8 and 30.6 C lower and upper developmental thresholds).