Occurrence and control of pepper rust

Symptoms of rust: Spotted water-like chlorotic plaques appear on the front of the leaves at the beginning of the disease, and the corresponding leafy spots on the back of the leaves form round yellow spots. As the lesions increase, they show yellow smear spleen Heap, ring-shaped or scattered, 4-5 mm in diameter. These blisters rupture and release orange powdery urediospores. After 9-11 days of formation of the summer spore heap, the color gradually deepens into the orange-red colloidal teliospores, and the protrusions are not broken, round or elongated, scattered or arranged in a ring shape.

The occurrence time of pepper rust is in the summer and autumn when the temperature is high and high, and it usually begins in the middle of June, and the period from July to September is the peak period.

Control measures: 1. Spraying 1:10:100 times Bordeaux mixture and 200-400 times of rust-free spirit for prevention and treatment at the initial stage of the disease. 2, every 15-20 days of the onset of the disease spray 50% Fumex double wettable 800 times liquid or 15% triazolone 1000-1500 times mixed 65% Dyson zinc 506 times solution, or 50% carbendazim Suspension 600 times solution plus 80% Phytophthora WP 1500 times solution. Author: Gui in 1000

From:Sichuan Agricultural Economic Net

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