Pharmacopoeia control of broad bean diseases and insect pests
December 16 13:02:05, 2018
In addition to the selection of disease-resistant varieties, reasonable dense planting and pruning, improvement of ventilation and light transmission conditions, improvement of drought and drainage, reduction of field humidity, increase of phosphorus and potash fertilizers, and strengthening disease resistance of broad beans, pesticide control is also necessary. . 1. On the leaves of the red leaf spot, Mr. Red’s small dots gradually expand into round or oval lesions. In severe cases, the parts become black and rot, and the sclerotia has black sclerotia on the inner wall of the stem. Chemical control: spray Bordeaux mixture 1:2:100 at the beginning of the disease. After every 10 days, spray 50% carbendazim 500 times once and spray 2 or 3 times. The initial injection of Bordeaux multi-liquid control effect is better than carbendazim, after spraying carbendazim, the control effect is higher than Bordeaux mixture. 2. Rust spots appeared on the cast leaves until the leaves were dry and the plants were all dead. Chemical control: 15% triadimefon 50 grams, 50 to 60 kilograms of water, 40 to 60 kilograms per mu. Apply again about 20 days after application. Pay attention to applying pesticides during the period of insect pests, otherwise, the control effect is poor. 3. Fusarium wilt mainly has roots with black lesions, short main roots, few lateral roots, yellowish leaf color, plants showing wilting, and the top stems and leaves wilt. Chemical control: In the early stage of disease, 50% thiophanate-methyl 500 times solution can be applied to the root. Medication 2 to 3 times, have better control effect. 4, Vicia faba as a larvae into the faba bean in actual harm, resulting in sub-real food taste bitter, weight loss, causing reduced production, quality deterioration. Drug control: In the early flowering period to the flowering period of broad bean, use 20% speed killing Ding 20 ml to 60 kg of spray poisoning adult insects per acre. Spray 7 days later, with good control effect. In the final flowering period of the faba bean, spraying 40% dimethoate 1000 times, the poisonous grass kills the larvae also has a good effect.