Identification and Prevention of Lentil Rust
Symptoms: The disease is caused by the bacterium Pseudomonas and mainly damages the leaves. In the early stage of disease, small yellow spots on the back of the leaves gradually became brown, and the spore piles uplifted. After the surface ruptured, reddish-brown powder was emitted, causing the leaves to fall off. Slightly raised sow brown spots appeared on the front of the leaves. The leaves are yellow and the plants die.
Incidence pattern: Pathogens mainly overwintered in the residual spores in the form of winter spores, winter in the form of summer spores on the living body, spores spread in the spring of the following year. Insufficient fertilizer results in poor growth and development. The average daily temperature is 23°C, relative humidity is 90%, and the incubation period of pathogenic bacteria is 8-9 days. The daily average temperature is stable at 24°C and continuous rainy weather causes the epidemic.
Control methods: pollution-free cultivation requirements to do when preventing diseases: First, to master its incidence rules, do a good job in forecasting; Second, select the best medication period, and strive to cure once; Third, as far as possible the use of non-polluting pesticides or Lightly contaminated pesticides; Fourth, alternate use of drugs, and the use of Class A green foods allows limited use of low toxicity and individual moderately toxic pesticides; Fifth, priority is to use agricultural measures to keep the field as far as possible ecological balance.
1 Agricultural control measures
Select disease-resistant varieties, promote fitness cultivation, enhance the resistance of plants; strengthen ventilation, reduce field humidity; clean the pastoral, remove field stubbles and other debris, concentrate burning or deep buried; rational irrigation, not flood irrigation, with irrigation Rows; reasonably dense planting, timely pruning, removal of diseased leaves; increased application of organic fertilizers to enhance the plant's resistance to stress, timely clearance of the ditch, to stop the rain to dry.
2 eradication center
The elimination of rust in the early stages of disease is the main measure to save investment and reduce pollution. Therefore, to check early, once the onset of the disease is found, it must be promptly treated with medication and eliminated.
3 Chemical control
Pharmacological Prevention and Control As far as possible, biological pesticides, plant-derived pesticides, and mildly contaminated pesticides are used to reduce the pollution of lentils and the pollution to the surrounding environment. The main use of green enjoy No. 2 600 times liquid spray control or 2% Wuyimycin 150-200 times liquid control, or with Green enjoy 7 prevention.
Able to use Baume 0.3 degree lime sulfur, once every 7-10 days, continuous spray 2-3 times.
Two parts of plant ash plus one part of lime are sprinkled on the diseased plants in the morning when the dew is not dry, or lime powder or sulphur powder 40 kg lime and 3 kilograms sulfur powder) to control the disease center and prevent the spread.
When rust occurs during growth, it can be sprayed with 25% triadimefon 500 times solution, or sprayed with 25% carbendazim 800-1000 times, so that it can be controlled alternately. A pesticide can only be used on a crop. Once, to ensure that the content of toxic and harmful substances in lentils does not exceed the standard.
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