Control methods of diseases and insect pests in cabbage

Cabbage, also known as cabbage, is a common market in life, with a wide range of planting, and the damage of diseases and insect pests seriously affects its growth and yield in the process of cabbage planting. So what are the diseases and insect pests of cabbage? How to prevent and cure it? Let's get to know it.

1. Black rot

The main harm to leaves, leaf balls, seedling disease cotyledons will form water-like disease spots, and then gradually spread to the real leaves, real leaf veins appear black spots or thin black stripes, leaf margin V-shaped disease spots. More than half of the lower leaves of the adult plant began to suffer from the disease, forming leaf spots or leaf veins yellowing, leaf spots with leaf edges expanding inward, expanding necrosis, and the bacteria spread to the base of the stem to form black reticular veins, resulting in the death of the plant.

Control method: soak the seeds in warm water for half an hour before sowing, sow or sprout the seeds after cooling, or soak the seeds with 50% Dysenamine 200 times solution for 15 minutes, wash and dry to sow the seeds. Reasonable rotation, reasonable fertilization, avoid partial application of nitrogen fertilizer, the disease is spraying Bordeaux solution, chlorothalonil, Streptomyces control, the effect is better.

2. Soft rot

Generally occurs after the cabbage core, the stem base and inside the cabbage heart water immersion soft rot phenomenon, then the plant withered and yellow, the outer leaves withered and fell off, making the leaf ball exposed.

Prevention and control method: turn the soil layer 18-20 cm deep before planting. Pay attention to drainage in the rainy season, should not flood irrigation, cloudy days and noon should not be watered, to rotation with onion and garlic crops. It is found that the diseased plants should be removed in time, and the diseased points should be disinfected with lime, and they can also be sprayed with benzoyl ammonium, streptomycin or chloramphenicol. Attention should be paid to spraying petioles and rhizomes close to the ground.

3. Black spot

The main harm to the leaves, the damage to the leaves after the emergence of irregular water-immersed or oil-soaked spots, and then gradually changed to light brown or dark brown.

Control methods: rotation with non-cruciferous crops for more than 2 years, disinfect the seeds before sowing, spray streptomycin, chloramphenicol and neophytomycin at the initial stage of the disease, each interval of 7-10 days, continuous 2-3 times, the effect is better.

4. Pieris rapae

Also known as cabbage butterfly, white pink butterfly, the larva is called Pieris rapae, mainly to harm the larva, serious when the leaves will be eaten clean.

Prevention and control methods: when the larvae are harmful, start spraying pesticides, the commonly used agents are chrysanthemum EC, chrysanthemum and horse EC, the control effect is better, but we should pay attention to the alternate use of chemicals, so as not to cause drug resistance.

The above is the introduction of cabbage pest control methods, hope to help you, want to know more related knowledge, please pay attention to us.