Cotton boll abscission influenced by tarnished plant bug feeding

Document Type

Conference Proceeding

Publication Date

12-1-1999

Abstract

The tarnished plant bug (TPB), Lygus lineolaris (Palisot de Beauvois), is becoming a significant late-season pest in Louisiana cotton. The effects of TBP density and boll age on boll abscission were studied during 1997-1998. TBP adults were caged on bolls classed according to heat units (HU) accumulated. Boll abscission was recorded at 72 hours after infestation (HAI), 7 days after infestation (DAI) and at harvest. Significant differences in boll abscission between TPB infestation levels ≥ 2 TPB/boll and infestation levels ≤ 1 TPB/boll were observed at 72 HAI and 7 DAI. At 72 HAI and 7 DAI, cotton bolls that had accumulated ≤ 265 HU or 11.7 days beyond anthesis had higher boll abscission rates than that for the non-infested control. At harvest, boll abscission rates for the infested bolls remained higher from the non-infested controls until bolls accumulated approximately 300 HU or 13.3 days beyond anthesis.

Publication Source (Journal or Book title)

Proceedings of the 1999 Beltwide Cotton Conference, January 1999, Orlando, Florida, USA

First Page

1046

Last Page

1048

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