Potato late blight begins to contract from the middle and lower leaves. Water-stained green-brown spots appear at the tip or leaf edge, and there is a wide gray-green halo around. When the humidity is high, the lesions rapidly expand into yellow-brown to dark brown. Large spots, gray-brown edges, and inconspicuous boundaries, often produce a circle of sparse white mold at the border of disease and health, especially after rain or early morning. The air is dry and the lesions become brown, dry, cracked or curled. The stems and petiole are infected, and irregular brown streaks are formed. In severe cases, the leaves are wilted and curled, and eventually the whole plant is black rot. Potato tubers are infected, and the primary light brown spots become irregular brown to purple-brown lesions. They are slightly sunken and the edges are not obvious. The subcutaneous potato is light brown to dark brown in the diseased part, eventually causing the potato to rot.


Prevention and treatment methods: timely spraying and prevention in the early stage of the disease. Curzate choice of 72% WP 600-800 times, 64% of the anti-virus alum WP 500 times or 50% dimethomorph WP spraying. To ensure control, the condition is investigated 3-7 days after each spray . In order to avoid the emergence of drug resistance, the drugs should be used alternately, and the same agent should not be sprayed continuously for more than 3 times.


(Source: Hebei Science and Technology News Author: Yutian County Agriculture and Animal Husbandry Su Yadong)




Total 1 | <First <Prev 1 Next> Last> |
share to:

Product advantages:

1. 100% fresh aluminum alloy 6063-T5, iron containing is less than 2% , sturdy and durable, full thickness 3.0mm.


2. 3 layer PVDF color coating, thickness more than 80 microns, excellent weather resistance, never fade,More upscale appearance.

3. 100% fresh virgin Bayer Polycarbonate Sheet, 30-50 micron anti-UV coating, can withstand 75% ultraviolet light, impact strength is 300 times that of ordinary glass, 10 years warranty.


4. The motor adopts the domestic leading brand and is guaranteed for 10 years.

5. Rugged and novel internal design, 3.0mm thick aluminum alloy profile, 4-10mm high strength impact resistant endurance board, can withstand snow loads of 30 to 45 cm.


6. High anti-aluminum structure provides maximum safety even in strong winds (strongest 12 winds) (34m / s strong wind).

Novel structure and easy installation

7. Packaging, protecting the product during shipping and making it easier to install.

Middle Line Pool Enclosures

Middle Line Pool Enclosures,Retractable Pool Enclosures Cost,Retractable Pool Shelters,Retractable Pool Shelter

FOSHAN KASO BUILDING MATERIAL CO.,LTD , https://www.kasocover.com