Skip to main content
ARS Home » Research » Publications at this Location » Publication #76100
Title: PEANUT RESPONSE TO ETHALFLURALIN: RATES AND METHODS OF APPLICATION.

Author
item Johnson, Wiley - Carroll
item COLVIN, D - UNIVERSITY OF FLORIDA
item WEHTJE, G - AUBURN UNIVERSITY
item LITTLEFIELD, T - UNIVERSITY OF FLORIDA
item MULLINIX JR, B - UNIVERSITY OF GEORGIA

Submitted to: Peanut Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 8/16/1997
Publication Date: N/A
Citation: N/A

Interpretive Summary: Dinitroaniline herbicides are among the most widely used herbicides on broadleaf crops. These herbicides effectively and economically control an array of annual grasses and certain broadleaf weeds. Typically, dinitroaniline herbicides are applied preplant incorporated (PPI). With recent interest in conservation tillage and stale seedbed cropping systems, ,there is interest in applying dinitroaniline herbicides preemergence (PRE) However, there are injury considerations in peanut that need to be addressed. Studies were conducted in 1994 and 1995 at Headland, AL, Gainesville, FL, and Tifton, GA to quantify dinitroaniline herbicide injury on peanut. Herbicides studied were ethalfluralin (Sonalan TM), trifluralin (Treflan TM), and profluralin (Tolban TM). Herbicides were applied PPI or PRE, at 0, 0.5, 1.0, 2.0, and 4.0 lb. ai/A. The parameters most sensitive to dinitroaniline herbicide injury were pod biomass and yield, while vegetative growth parameters were less sensitive. Dinitroaniline herbicides applied PPI were generally more injurious than PRE applications, especially when rates were > 2.0 lb./A. At these rates, pod formation was inhibited and yields reduced. These data show that dinitroaniline herbicides have a wide safety margin and can be safely applied at registered rates either PPI or PRE on peanut.

Technical Abstract: Studies were conducted in 1994 and 1995 at Headland, AL, Gainesville, FL, and Tifton, GA to quantify dinitroaniline herbicide injury on peanut. Herbicides studied were ethalfluralin (AL, FL, and GA), trifluralin (AL and FL), and profluralin (GA). Herbicides were applied preplant incorporated (PPI) or preemergence (PRE), at 0, 0.6, 1.1, 2.2, and 4.5 kg ai ha-1. The parameters most sensitive to dinitroaniline herbicide injury were pod biomass and yield, while vegetative growth parameters were less sensitive. Dinitroaniline herbicides applied PPI were generally more injurious than PRE applications, especially when rates were > 2.2 kg ha-1. At these rates, pod formation was inhibited and yields reduced. These data show that dinitroaniline herbicides have a wide safety margin and can be safely applied at registered rates either PPI or PRE on peanut.