http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Soil persistence and cotton (Gossypium hirsutum L.) response to CGA-362622
Soil persistence and cotton (Gossypium hirsutum L.) response to CGA-three six two six two two
The new sulfonylurea herbicide CGA-362622 with the proposed common name of trifloxysulfuron sodium is under development by Syngenta Crop Protection. Studies were conducted to: 1) investigate potential cotton phytotoxicity with CGA-362622 tank-mixed with selected cotton insecticides; 2) determine absorption and translocation of ¹⁴C-labeled CGA-362622 applied alone and in combination with malathion; 3) determine response of four cotton varieties to CGA-362622; 4) evaluate potential carryover of CGA-362622 to corn, grain sorghum, rice, and soybeans; and 5) determine greenhouse bioassay results on corn and sunflower with soil collected from field studies. Research was conducted to evaluate CGA-362622 applied post over-the-top of cotton alone and in tank-mixture with several insecticides including acephate, dicrotophos, azinphos methyl, oxamyl, thiamethoxam, dimethoate, and malathion. CGA-362622 tank-mixed with malathion resulted in greater cotton phytotoxicity than either applied alone and yield was reduced in one of four locations. Pyrithiobac tank-mixed with malathion resulted in similar levels of cotton phytotoxicity. The other insecticides tank-mixed with CGA-362622 generally did not adversely affect cotton. Greater absorption of radiolabeled CGA-362622 occurred in treated leaves 4 h after application of CGA-362622 tank-mixed with malathion compared to CGA-362622 applied alone to 3-to 4-leaf cotton. Translocation of CGA-362622 to plant tissue above and below the treated leaf was greater with the tank-mixture. Field studies indicated there was not a significant difference in the response of cotton varieties Delta Pine and Land 50, Stoneville 474, Paymaster 1220 and Paymaster 1220 RR to CGA-362622 at 1, 2, and 4X of the proposed over-the-top rate. Cotton recovered from the 1 and 2X rates by 14 days after treatment (DAT), but the 4X rate resulted in a height reduction. Corn and grain sorghum responded similarly to CGA-362622 residues in soil persistence experiments and were more sensitive than rice and soybeans. All crops exhibited significant phytotoxicity to CGA-362622 at 60 g/ha when planted 90 DAT. Greater soil persistence was observed 90 DAT at the location with a pH of 7.2 compared to the other location with a pH of 6.8. However, no injury was observed at either location to any crop planted 209 to 312 DAT.
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Includes bibliographical references (leaves 66-73).