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ARS Home » Research » Publications at this Location » Publication #86964
Title: RESPONSE OF A TRANSGENIC COTTON AND WEED CONTROL TO PYRITHIOBAC AND SELECTED ADJUVANTS.

Author
item WILLS, GENE - DELTA RES. & EXT. CENTER
item Hanks, James
item JONES, ELIZABETH - DELTA RES. & EXT. CENTER
item MACK, ROBERT - HELENA CHEMICAL COMPANY

Submitted to: Weed Science Society of America Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 2/25/1998
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Field studies were conducted at Stoneville, Mississippi, to evaluate the toxicity of pyrithiobac at 70 g ai/ha applied alone or in combination with the adjuvants HM7912 (crop oil concentrate, 80% nonphytotoxic oil and 20% nonionic surfactant) at 1% v/v, HM9110 (proprietary blend of alkyl aryl polyoxlkane ether free fatty acids) at 0.25% v/v, and HM8802 (proprietary blend of methylated seed oil and organosilicone surfactant) at 0.5% v/v. Application was to 8- to 15-cm tall transgenic cotton "Nu COTN-33" or the parent line "DPL-5415" each growing in the same area with 5- to 15-cm tall pitted morningglory (Ipomoea lacunosa L.), 8- to 12-cm tall prickly sida (Sida spinosa L.), and 8- to 15-cm tall velvetleaf (Abutilon theophrasti, Medik). All were planted at the same time. At 2 weeks after treatment, pyrithiobac either alone or with HM7912, HM9110, or HM8802 controlled pitted morningglory 74, 89, 90, and 89%, prickly sida 74, 91, 85, and 86%, and velvetleaf 83, 95, 95, and 94%, respectively. Neither the "Nu COTN-33 nor the DPL-5415 cotton variety was affected by pyrithiobac alone or with the addition of each of the surfactants.