Herbicide Resistant Corn Hybrid Research in Georgia - 2001 Eric P. Prostko William K. Vencill R. Dewey Lee Dept. Crop & Soil Sciences University of Georgia.

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Presentation transcript:

Herbicide Resistant Corn Hybrid Research in Georgia Eric P. Prostko William K. Vencill R. Dewey Lee Dept. Crop & Soil Sciences University of Georgia

Herbicide Resistant Crops - US (Not Including Stacked Varieties) Source: NASS/USDA

Research in 2001 u hybrid performance * Tifton (2 tests) * Athens u application timing * Grady Co. * Seminole Co.

Research in 2001 u hybrid performance * Tifton * Athens u application timing * Grady Co. * Seminole Co.

Herbicide Resistant Corn Hybrid Performance (LSD 0.05 = NS)

Roundup Ready Corn Hybrid Performance (LSD 0.05 = 15)(LSD 0.10 = 22)

Roundup Ready Corn Hybrid Performance Ponder Farm abc ef c-fb-e def ab bcd

Liberty Link Corn Hybrid Performance (LSD 0.05 = 15)(LSD 0.10 = 22)

Clearfield Corn Hybrid Performance (LSD 0.05 = 15)(LSD 0.10 = 22)

Research in 2001 u hybrid performance * Tifton * Athens u application timing * Grady Co. * Seminole Co.

Corn Yield Response to Liberty Application Timings, Grady County - NK83-Z8 28 ozs/A + 3 lb/A c abcbc aa abc c bc P = 0.10

Corn Yield Response to Roundup Ultra Application Timings, Seminole County - DK622RR Roundup 26 ozs/A + 3 lb/A cd bcd abc ab a abc d bcd P = 0.10

Summary u Better hybrids are available. * DK 662RR * NK 83Z8LL * G8222-IT u Apply 3-4 WAP u Apply 3-4 WAP u Tank-mix with atrazine * Liberty ATZ or ReadyMaster ATZ

University of Georgia Extension Weed Science (gaweed.com)