Cultivation of White Flower and broccoli and guidance Scheme for Disease and Pest Control

The Zhaoguan village committee is located in the southwest of our town and belongs to the semi-mountainous village committee. Baichi is located in the west of our town and belongs to the mountain village committee. The two village committees grow vegetables mainly in autumn and winter, mainly growing white flowers and broccoli. My guidance work is mainly to control diseases and insect pests of white flowers and broccoli, followed by other vegetable crops.

First, choose a suitable variety

Broccoli varieties are Sparta, Huixing, Night Green, Qiang Han; White flower varieties are 399-2, Snow 90, Xue Lei 4, Angel and so on.

Prevention and treatment of root swelling disease

When transplanting, use 75% chlorothalonil + 40% pentachloronitrate, pour it with water when transplanting, use 1 kg of chlorothalonil and 1 kg of pentachloronitrobenzene per mu, be careful not to pinch the base of the stem too heavily when planting, and do not bury the seedling heart in the soil.

III. Fertilization technology

The fertilization method of promoting the middle control before and after the supplement was adopted.

The first fertilization, now mixed with water pouring, it is best to use water-soluble fertilizer, ammonium nitrate or urea 5-8 kg per mu.

For the second topdressing, 10-15 kg of urea or ammonium nitrate per mu was applied with 4 kg of boron fertilizer and water 15 days after transplanting.

25 days after transplanting, the third topdressing was applied in ponds with 50-60 kg compound fertilizer at 15:15:15 or 18:6:24 per mu, followed by watering.

For the fourth topdressing, 50-60 kg compound fertilizer was used at 30:0:5 per mu during the period of flower head formation. It can also be applied quantitatively according to the seedling condition.

IV. Major diseases and insect pests

The main diseases are black rot, black spot, downy mildew and gray mildew.

1. Black rot is a bacterial disease. 72% agricultural lianmycin or chunromycin and trichlorothalonil are sprayed with 75% chlorothalonil for 2-3 times at intervals of 7-10 days.

2. Black spot: at the initial stage of the disease, 75% chlorothalonil wettable powder 1500 times or 50% propofol wettable powder 1500 times, propicin zinc 100g / mu water spray control, once every 10 days, even prevention 2-3 times.

3. Downy mildew: at the initial stage of the disease, 72% Shuangkang wettable powder 800 times solution or 58% metalaxyl manganese zinc 500 times solution, or 70% mancozeb 500 times solution can be sprayed to prevent and cure downy mildew, and 60% propiconium urea cyanazolol can also be used to control the disease.

Major pests:

1. Aphids: use 30% high manganese emulsion, 70% imidacloprid, 10% golden year.

2. Diamondback moth and beet armyworm: spray control with 3-5% abamectin 50-70 ml / mu plus 70 ml dichlorvos 45 kg / mu; 8000 mesh of Bacillus thuringiensis 75 g / mu 45 kg / mu or 5.7% methylvitamin salt 30 g / mu 45 kg / mu; 1% azadirachtin 50 ml / mu and 20 kg water.

3. Pieris rapae: use Yinnong No. 2 (2.5% methyl salt), 5.7% chloramphenicol salt 30 grams per mu, cotton bollworm nuclear polyhedrosis virus 1000 times.

4. Ground maggots: apply with 48% chlorpyrifos, 15ml and 25kg of water or with phoxim.