Prevention and control of broad bean pests and diseases, in addition to the selection of disease-resistant varieties, reasonable close planting and pruning, improve ventilation and light transmission conditions, do a good job of drought prevention and drainage, reduce field humidity, increase phosphorus and potassium fertilizer, enhance the disease resistance of broad bean, chemical control is also necessary .
1. The red spot on the leaf of the red spot disease is gradually expanded into a round or elliptical lesion. When it is severe, all parts become black and withered, and the inner wall of the stem has a black sclerotium. Chemical control: Spray 1:2:100 Bordeaux mixture at the beginning of the disease, and then spray 50% carbendazim 500 times once every 10 days, and spray 2 to 3 times. The initial spray of Bordeaux liquid is better than carbendazim, and after spraying carbendazim, the control effect is higher than Bordeaux mixture.
2. The rust spots appear on the leaves of the cast disease until the leaves are dry and the plants are all dead. Chemical control: 50 grams of 15% rusting can be used, sprayed 50-60 kilograms of water, 40-60 kilograms per acre. Spray again 1 day after application for about 20 days. It is necessary to pay attention to the application of the drug at the time of the disease, otherwise, the control effect is not good.
3, Fusarium wilt mainly has root lesions black, the main root is short, the lateral roots are less, the leaf color turns yellow, the plant is wilting, and the top stem leaves are drooping. Chemical control: In the early stage of the disease, roots can be applied with 50% methyl thiophanate 500 times solution. 2 to 3 times of medication, have a good control effect.
4, broad bean elephant larvae into the silkworm beans in the real harm, resulting in the child's taste becomes bitter, weight loss, causing reduced production, quality deteriorated. Drug control: In the early flowering period to the full bloom period of the broad bean, 20% of the cockroach is used to kill 20 ml of water, and 60 kg of water is sprayed to kill the adult worm. After 7 days, it is sprayed once again, and the control effect is good. In the final flowering period of the broad bean, spraying 40% of the fruit 1000 times liquid, the poisonous grass kills the larva also has a good effect.
1. The red spot on the leaf of the red spot disease is gradually expanded into a round or elliptical lesion. When it is severe, all parts become black and withered, and the inner wall of the stem has a black sclerotium. Chemical control: Spray 1:2:100 Bordeaux mixture at the beginning of the disease, and then spray 50% carbendazim 500 times once every 10 days, and spray 2 to 3 times. The initial spray of Bordeaux liquid is better than carbendazim, and after spraying carbendazim, the control effect is higher than Bordeaux mixture.
2. The rust spots appear on the leaves of the cast disease until the leaves are dry and the plants are all dead. Chemical control: 50 grams of 15% rusting can be used, sprayed 50-60 kilograms of water, 40-60 kilograms per acre. Spray again 1 day after application for about 20 days. It is necessary to pay attention to the application of the drug at the time of the disease, otherwise, the control effect is not good.
3, Fusarium wilt mainly has root lesions black, the main root is short, the lateral roots are less, the leaf color turns yellow, the plant is wilting, and the top stem leaves are drooping. Chemical control: In the early stage of the disease, roots can be applied with 50% methyl thiophanate 500 times solution. 2 to 3 times of medication, have a good control effect.
4, broad bean elephant larvae into the silkworm beans in the real harm, resulting in the child's taste becomes bitter, weight loss, causing reduced production, quality deteriorated. Drug control: In the early flowering period to the full bloom period of the broad bean, 20% of the cockroach is used to kill 20 ml of water, and 60 kg of water is sprayed to kill the adult worm. After 7 days, it is sprayed once again, and the control effect is good. In the final flowering period of the broad bean, spraying 40% of the fruit 1000 times liquid, the poisonous grass kills the larva also has a good effect.
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