Peas are common vegetables that many people like to eat. In the rural areas, almost every household will grow some. We know that no matter what kind of vegetables are planted, the pests and diseases are the worst, then what pests and diseases will be planted in peas? Let's take a look at them.
The diseases of peas mainly include root rot, brown spot, powdery mildew, brown streak, etc. The main pests are black dive, leaf miner and so on. Let's take a look at each of the pea control methods.
Root rot
Symptoms: From seedlings to adult plants, the disease can occur in the flowering stage, mainly in the root or stem base. The leaves of the diseased plants first turn yellow, and then gradually develop to the middle and upper parts, resulting in yellowing and wilting of the whole plant. The main and lateral roots became dark brown or reddish, and the nodules and root hairs were significantly reduced. Lightly, the plants were dwarfed, the stems were thin, and the leaf branches were wilting or withered.
Causes of the disease: The pathogen spreads through the soil, the diseased tissues and seeds, and is infiltrated by the seed coat and the lateral roots, which is easily confused with the blight. The incidence is generally heavy in dry years.
Chemical dressing control method: seed dressing with 75% chlorothalonil WP of 0.2% of seed weight.
Brown spot
Symptoms: mainly harmful leaves, stems and pods. In the case of leaf infection, there will be small lavender spots. Under high temperature and high humidity conditions, the lesions will spread rapidly and spread over the whole leaves. After the diseased leaves turn yellow and twisted and die, some are dark brown irregular wheel spots, and the central necrosis is produced. Black dots.
Causes of the disease: The bacteria mainly overwinter on the seeds and spread by the wind and rain. Seeding too early or suffering from low temperature chilling, or soil viscosity, humidity is too high, or partial application of nitrogen fertilizer, plant growth, are easy to develop.
Agricultural control: 2-3 years of rotation of heavy diseased and non-legume vegetables, and seed disinfection, pre-soaked in cold water for 4-5 hours, then immersed in 50 °C warm water for 5 minutes, then cooled and dried. sowing. Appropriate close planting, increase the application of potassium fertilizer.
Chemical control: 50% benomyl WP suspension 800 times solution, 70% methyl thiophanate WP 500 times solution, 75% chlorothalonil WP 600 times solution, etc., every 7 days Second, even spray 2-3 times.
powdery mildew
Symptoms: At the beginning of the disease, the leaf surface is a pale yellow spot, which expands into an irregular shape. In severe cases, the front and back of the leaf are covered with a layer of white powder, and finally the yellow is dead. At the end of the disease, the pink spots became gray and many small black spots appeared.
Control method: 25% powder rust WP 2,000-3000 times solution, 25% pyraclostrobin, 4% pyrimidine nucleoside antibacterial 400 times solution, or 50% carbendazim WP 500 times solution Spray once every 10 to 20 days, even 2 to 3 times.
Brown streak disease
Symptoms: mainly harmful leaves, stems and pods. The leaves are infected with irregular lavender spots. Under high temperature and high humidity conditions, the lesions spread rapidly and spread over the entire leaves. The leaves turn yellow and twisted and die, and some are dark brown irregular wheel spots, central necrosis. Produces black dots.
Causes of the disease: The bacteria mainly overwinter on the seeds and spread by the wind and rain. Seeding too early or suffering from low temperature chilling, or soil viscosity, humidity is too high, or partial application of nitrogen fertilizer, plant growth, are easy to develop.
Agricultural control: It is best to carry out rotation for more than 3 years with non-legume crops, and to disinfect seeds, soak seeds in warm water for 4-5 hours, then transfer them to 55 °C warm water for 5 minutes, then cool them in cold water and dry them. sowing. Appropriate close planting, increase the application of potassium fertilizer.
Chemical control: spray 50% mixed sulfur suspension 500 times solution, or 75% chlorothalonil wet powder 600 times solution at the beginning of the disease, once every 7 days, continuously spray 2-3 times.
Black stag
Hazard Symptoms: Black stalk is a pest of the genus Diptera of the Diptera, and is a widely distributed pest, mainly for legumes, from the newly hatched larvae to the young parts of the veins and petioles. Into the main stem, foraging the pith and xylem. If the prevention is not timely, it will cause serious production cuts.
Agricultural control: appropriate mediation of the sowing date, staggered adult eggs to prolong the period of time to reduce damage.
Chemical control: The application of the drug is 31% Avi-killin or 45% phoxim emulsifiable concentrate.
Leaf miner
Hazard Symptoms: The pea leaf miner is a species of the leaf miner, also known as the leaf miner, which is commonly known as the archaea, the leafhopper, the leafhopper, etc. It is a polyphagous pest, it has more than 130 Host plants, mainly harmful to celery, cabbage, radish, broad beans, sage, etc. in vegetables.
Agricultural control: After the vegetables are harvested, the leaves, weeds, burned or fattened in the field are removed in time to reduce the number of insects in the field.
Chemical control: 31% Avi-killin, 5% avermectin EC, etc. can be used for prevention and treatment.
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