Two methods for controlling corn brown spot
(I) Occurrence The brown spot disease of corn is a fungal infection caused by the pathogen Exserohilum turcicum, which belongs to the class of Dothideomycetes. This fungus survives in the soil or on infected plant residues in the form of dormant spores, and spreads to maize plants through wind and rain during the following growing season. Under favorable conditions, such as high humidity and warm temperatures, the zoospores germinate and move through water films on the leaf surfaces, leading to infection. The disease primarily affects the silks and young tissues of the corn plant. Prolonged rainy weather during the mid to late growth stages of corn, especially in areas with high humidity and temperatures above 25°C, creates an ideal environment for disease development. Additionally, low-lying fields and continuous cropping practices tend to increase disease severity. (II) Prevention and Control Methods Cultural Practices To manage this disease effectively, it is important to select and plant resistant corn varieties, and avoid planting the same crop in the same area for more than three consecutive years. Proper fertilization and irrigation should be applied to promote strong plant growth and improve resistance to infection. After harvest, all infected plant debris must be removed from the field, and deep plowing should be done to reduce the number of overwintering spores in the soil. Chemical Control If the disease begins to appear, it is recommended to apply fungicides such as 20% triadimefon emulsifiable concentrate diluted at 3000 times, 50% carbendazim wettable powder diluted between 500 to 800 times, or 25% mancozeb wettable powder diluted at 1500 times. These treatments should be applied every 7 to 10 days, with 2 to 3 applications typically needed for effective control. Adding foliar nutrients like foliar treasure, potassium dihydrogen phosphate, or urea to the spray solution can enhance the overall effectiveness. When spraying, focus on the lower and middle leaves, as well as the leaf sheaths, where the fungus tends to develop first. Consistent monitoring and early intervention are key to preventing widespread damage. Rice Noodle Production Line,Fried Instant Noodles Production Equipment,Non-fried Corrugated Noodle Equipment Henan chinamian foods CO.LTD , https://www.ooossooo.com