Main diseases and insect pests of broccoli and their control techniques, preservation methods of edible fungi

1. Diseases and insect pests of broccoli at seedling stage

The main diseases and insect pests of broccoli at seedling stage are quenching disease, blight disease, beet armyworm, Spodoptera litura and jumping beetle and so on. Disinfect the soil with 95% Luheng No. 1 wettable powder 3000 times, and sow seeds with 2.5% Xerox suspension, the dosage is 0.1% of the seed weight, or spray 58% Redomir wettable powder 500 times 600 times at the initial stage of the disease, and spray 1500 times with 10% high water dispersible granule at the initial stage of the disease. After sowing, underground pests such as leaping beetles were sprayed 2000 times with 4.5% efficient cypermethrin EC.

two。 Agricultural prevention and control measures

Reasonable rotation, it is best to implement flood-drought rotation, but also with melons, beans and other non-cruciferous vegetables rotation. Secondly, disinfect the seeds and cultivate disease-free and strong seedlings. Before planting, the seeds can be mixed with 2.5% of the seeds. On the basis of scientific soil preparation and reasonable close planting, it is necessary to water and fertilize reasonably.

3. Biological control measures

Mainly active use of biological pesticides, plant extracts, but also consider the use of ladybugs, spiders, Trichogramma and so on to kill the enemy.

4. Principles of chemical control of diseases and insect pests in broccoli

According to the occurrence of diseases and insect pests, prescribe the right medicine to the case, rational use of drugs, can pick and treat not universal treatment, can treat both not only. Rational rotation and alternate use of chemical pesticides, do not increase the concentration at will, accurately grasp the appropriate time for prevention and control, according to the prediction of diseases and insect pests, the appropriate period of drug use.

5. Principles of disease control in adult stage

For the prevention and control of Sclerotinia sclerotiorum, 1000-fold spray of 50% hydantoin wettable powder can be used at the initial stage of the disease and heading stage, and the last time 10 days before harvest; the control of downy mildew of broccoli can be controlled by spraying 72% grams of Ruth wet powder 500-fold 600 times at the initial stage of the disease, and the black rot and soft rot of broccoli can be prevented and treated with 45% ammonium solution 1500 times at the initial stage of the disease. To control Plutella xylostella, Spodoptera exigua, Spodoptera litura and Spodoptera litura, 5% Regent water agent 1500-2000 times spray can be used to control cabbage worm and vegetable borer, and broccoli leaf miner can be controlled by 3500 times spray with 75% Qianke wettable powder. When controlling broccoli aphids, you can choose 20% Kangfuduo concentrated solvent 5000 times spray.