Sweet Corn XXVI— 5

Leaf Rust

Howard F. Schwartz

(Puccinia sorghi): small, reddish brown to black, linear streaks or pustules on leaves. Defoliation and plant stunting may occur. Other controls include resistant varieties.

Product list for Leaf Rust:
Fungicide Common/Trade Name	Product per 100 lb seed	Frequency	Remarks
Chlorothalonil Bravo 90DG	0.6-1.5 lb	4-7 days	(7 days) Not for animal feed or processed products.
Dithane DF, F45	1.5 lb (DF) 1.2 qt (F45)	4-7 days	7 days, Do not exceed 24 lb (DF) or 18 qt (F45) product per season.
Mancozeb Penncozeb 80W Penncozeb 75DF	1.0-1.5 lb 1.5-2 lb	4-7 days 7-10 days	Apply with sufficient water for thorough coverage. 7 days PHI. Do not feed treated forage to animals. Do not exceed 7.5 (80W) or 8.0 (75DF) lb/season.
The information herein is supplied with the understanding that no discrimination is intended and that listing of commercial products, necessary to this guide, implies no endorsement by the authors or the Extension Services of Nebraska, Colorado, Wyoming or Montana. Criticism of products or equipment not listed is neither implied nor intended. Due to constantly changing labels, laws and regulations, the Extension Services can assume no liability for the suggested use of chemicals contained herein. Pesticides must be applied legally complying with all label directions and precautions on the pesticide container and any supplemental labeling and rules of state and federal pesticide regulatory agencies. State rules and regulations and special pesticide use allowances may vary from state to state: contact your State Department of Agriculture for the rules, regulations and allowances applicable in your state and locality.

Categories: Sweet corn, Diseases, Leaf rust

Date: 05/05/02