Herbicide Resistant Corn Hybrid Performance in Georgia E. P. Prostko, E. F. Eastin, W. K. Vencill, and R. D. Lee University of Georgia Dept. Crop & Soil Sciences
Herbicide-Resistant Crops The problem …. . OR Will anyone buy them? ?
Herbicide Resistant Crops - US 2000 Source: NASS, June 2000
Herbicide Resistant Corn Hybrids What’s Available? ? â Roundup Ready â Liberty Link â Clearfield Corn** * IR or IT ** Not a GMO
Clearfield Corn (IR vs. IT) What’s the difference? â IR Hybrids (IMI-Resistant) * both parents carry resistance to IMI’s * cross-resistant to SU’s (OP interactions, recrop) * harder/slower to develop â IT Hybrids (IMI-Tolerant) * only 1 parent has resistance to IMI’s * easier/faster to develop
Herbicide-Resistant Crops What do producers want/need to know? ? â weeds controlled â cost/A â yield potential â yield drag? ?
Herbicide Resistant Corn Hybrid Tests - 2000 â 3 locations â small plots â CN, RR, LL, Clearfield hybrids â treated/untreated â 8” tall corn â grain yield
Results â no statistical differences in yield â no yield loss associated with herbicide application
Clearfield Corn Hybrid Performance in Georgia - 2000 *Treated with Lightning (1. 28 oz/A) + Atrazine (1. 5 pt/A) + AMS (2. 5 lbs/A) + COC (1% v/v)
Roundup Ready Corn Hybrid Performance in Georgia - 2000 *Treated with Roundup Ultra (1 qt/A)
Liberty Link Corn Hybrid Performance in Georgia - 2000 *Treated with Liberty (28 ozs/A) + AMS (2. 5 lbs/A)
Herbicide Resistant Corn Hybrids in Georgia - 2000 â hybrids that performed equal to or better than the test averages included the following: * Pioneer 32 K 63 LL (Liberty) * Garst 8222 IT (Clearfield) * Dekalb 626 RR (Roundup) Need more data!!!!!
Herbicide Resistant Corn Hybrid Technologies Cost/A for 1 application
The use of herbicide resistant corn hybrid technologies should be based upon ……………. . . â marketability â weed control problems â consistent hybrid performance and other agronomic traits â reduced or equal control costs
University of Georgia Extension Weed Science (gaweed. com)
Скачать презентацию Herbicide Resistant Corn Hybrid Performance in Georgia E
ef6082f5eb21a825ed0cb2f4999240c4.ppt