What are the symptoms of brown spot disease in water spinach? How to treat? How to use medicine?

Water spinach, also known as amaranth and rattan, is one of the common vegetable varieties in our life. The spinach is native to East Asia and is currently cultivated in the central and southern provinces of China. Because of its suitable growth environment, it is warm and humid, and the soil is fertile and humid. The place is not cold-resistant, so there is little planting in the north. In the process of planting water spinach, disease control is the key. One of the common diseases of water spinach is the brown spot disease of spinach. Today, Xiaobian focuses on the prevention and control measures of brown spot disease of water spinach.

Main symptoms of brown spot of spinach:

Harm the leaves. The lesion is round, elliptical or irregular, with a diameter of 4-8 mm. It is yellowish brown at first, and then becomes dark brown with obvious edges. When the disease is serious, the lesions are connected to each other and the diseased leaves are premature.

Causes:

The weather is humid and humid, or the spinach cultivated in the off-season is prone to disease.

Prevention and treatment methods:

1. Chemical control: spraying 70% mancozeb dry powder 500 times solution or 36% thiophanate-methyl suspension 600 times solution, 50% carbendazim WP 600-700 times solution, 50% at the beginning of the disease Benomyl WP 1500 times solution, once every 7 to 10 days, a total of 2 to 3 times. The medication was stopped 3 days before harvesting.

2. Agricultural control: From the disease-free plant on the seed, the seed is soaked in warm water at 48 °C for 30 minutes before planting; pay attention to field drainage, plant ventilation; use disease-resistant varieties.

The above is the prevention and control measures for the brown spot of the spinach in the Xiaonong.com, whether it is chemical control or agricultural control, the growers should choose the prevention and control method according to their actual conditions. If necessary, they can consult the local plant protection personnel. Comprehensive analysis and prevention based on local planting experience and climate. The above agents are for reference only and I hope to help you.

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