Main Diseases of Broccoli at the Seedling and Growing Stages and Their Control Methods

Main diseases of broccoli:

Broccoli diseases are divided into seedling-stage and growing-stage diseases;

Seedling-stage diseases of broccoli and their control:

The main seedling-stage diseases of broccoli are damping-off and Rhizoctonia rot;

The control method is to water the seedling bed before raising seedlings with 20 g of 50% carbendazim mixed with 15 kg of water. In the early stage of damping-off, spray with 72% Previcur or 64% Sandofan or 60% Mieke at 500-600 times dilution; in the early stage of Rhizoctonia rot, spray with 10% Score at 1500 times dilution.

Growing-stage diseases of broccoli and their control:

Growing-stage diseases of broccoli include downy mildew, viral disease, sclerotinia rot, black rot, soft rot, and so on.

Agricultural control methods include: 1. Select disease-resistant varieties. 2. Apply fully decomposed organic fertilizer and balance the application of nitrogen, phosphorus and potassium. 3. After harvest, clean the field promptly, remove plant residues and fallen leaves, and carry them out of the field for deep burial or burning.

Chemical control methods include: 1. Downy mildew: at the early stage of disease, spray with 50-75 g of ethirimol-mancozeb in 15 kg of water, or 15-20 g of Ruidu in 15 kg of water, or 60% Mieke or 64% Sandofan or 58% Ridomil or 72% Curzate at 500-600 times dilution. 2. Viral disease: 15-20 g of Bingdujing, Bingdubisi, etc. in 15 kg of water gives a relatively good control effect. 3. Sclerotinia rot: at the early stage of disease and on rainy days, spray with 50% Rovral at 1000 times dilution or 50% Sumilex at 1500 times dilution. 4. Black rot and soft rot: after transplanting and establishment, spray with 80% Bebi at 500 times dilution or 77% Kocide at 500 times dilution or 47% Jiaruinong at 800 times dilution.