Sweet Corn XXVI— 6

Helminthosporium Leaf Blight

Howard F. Schwartz

(Helminthosporium turcicum): long, narrow, stripe-like, white to tan, yellow or brown lesions on leaves. Is more severe on lower leaves. Other controls include crop rotation, old crop removal and resistant varieties.

Product list for Helminthosporium Leaf Blight:
Fungicide Common/Trade Name	Rate	Frequency	Remarks
Chlorothalonill Bravo 720, Ensign Bravo 90DG	0.8-2 pt 0.6-1.5 lb	4-7 days	(7 days) Not for animal feed. Do not graze or feed debris to livestock.
EBDC Dithane DF, F45	1.5 lb (DF) 1.2 qt (F45)	4-7 days	7 days. Do not exceed 24 lb (DF) or 18qt (F45) product per season.
Mancozeb Penncozeb 80W Penncozeb 75DF, 80W	1.0-1.5 lb 1.5-2.0 lb	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) lbs/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, Helminthosporium leaf blight

Date: 05/05/2002