Eggplant Response to Topical and Precision-Directed Applications of

Sandea (Halosulfuron)

Tim Flanders

And

Stanley Culpepper

The University of Georgia

OBJECTIVE• Determine the Tolerance of Eggplant to

various rates and application methods of Sandea Herbicide

TreatmentsOver-the-Top and Directed

• 0.5 ounces Sandea per Acre• 1.0 ounces per Acre• 4 replications per treatment

* All Treatments Contained 0.25% NIS by Volume

Application Information

• Plots = 6 ft. by 15 ft.

• 9 to 11 leaf stage, 5 week old plants

• 14.8 GPA spray solution

• Directed treatments precision applied to lower 25% of plant canopy

• Damaged ratings taken 7 and 12 DAT

TABLE 1. PERCENT INJURYTREATMENT MAY 4TH MAY 9TH

SANDEA – 0.5 OZ/ACPOST OVER THE TOP

48.8 A 51.3 B

SANDEA – 1 OZ/ACPOST OVER THE TOP

53.5 A 66.3 A

SANDEA – 0.5 OZ/ACPRECISION-DIRECTED

16.8 B 21.3 C

SANDEA – 1 OZ/ACPRECISION-DIRECTED

24.3 B 28.8 C

UNTREATED 0.0 C 0.0 DLSD (P = .O5) 11.43 12.74

Untreated Check

0.5 Ounces Over-the-Top Seven DAT

Conclusions• Eggplants do not have the tolerance of tomatoes

or many cucurbits and damage from any rate or treatment methods is unacceptable.

• More research is needed to determine tolerance when Sandea is used as a soil application between the bed forming and plastic laying operation.

• Plasticulture vegetable production will have to be a crop specific systems approach when controlling weeds, nematodes, and soil-borne diseases.