What are the main insect pests of summer cabbage? What can be done to prevent it?

Kale has a sweet taste, so it also attracts many pests. Cabbage heartworm is one of them. If you don't know much about this worm, isn't it more vivid to say like this?

A very thin thread like spider silk hangs a green worm, which is swayed from side to side by the breeze, and this green worm is called a silk worm. In addition, the larvae also damage the young stems, young pods and seeds of the remaining plants, which affects the seed setting of cabbage. It occurs all year round in vegetable areas, and it is more serious in March and June and September and December.

Diamondback moth mainly harms the leaves with larvae, and the newly hatched larvae can hide in the tissues of the leaves, eat the mesophyll of the leaves, and eat the epidermis and mesophyll of the leaves when they grow up, leaving a layer of epidermis and forming transparent spots.

It is common worldwide and affects more than 90% of crops. Due to the continuous prevention and control, the resistance is now high, and the effect of conventional insecticides on it is poor. In China, Guangzhou, Fujian and other coastal vegetable areas are particularly resistant to pesticides, which are the hardest hit areas of heartworm.

Pests are controlled by using pathogenic microorganisms that cause fungi, bacteria, viruses and other groups. Treating insects with fungi is a very safe means of control, which is not harmful to people, livestock, crops and microorganisms, and is conducive to maintaining ecological balance, and the control effect is very good. Drug prevention and treatment:

Spray in time and rotate the medicine to prevent pests from producing 2500 times of ulinary vinegar; or 50% phosphine 2000 times liquid; or 50% methamidophos 1000 1500 times liquid spraying, and can treat aphids and jumping beetles at the same time.

<> pathogens overwinter in diseased carcasses and soils, they can also overwinter on collected plants, and can be transmitted in the field by air currents or rainwater. When the temperature is slightly low, the temperature difference between day and night is large, and there is a lot of rain, high humidity or fog, it is easy to develop epidemics. Cabbage is seriously ill under the conditions of continuous cropping, water accumulation in the field, and fertilizer removal. :

One of the soil-borne diseases, mainly occurring in the seedling stage, the infected seedlings appear water-stained lesions at the base of the strength, which soften and then overflow into thin lines, resulting in the seedlings being unable to support lodging. Preventive measures are the same as blight!

The main insect pests of summer cabbage are diamondback moth, beet armyworm, Spodoptera litura, and cabbage worm. Rotate medications. Insecticidal lamps, these pests have a certain phototaxis.

<> cabbage is rarely heard of, but in fact, it is known as kohlrabi in the Tohoku region. Let's take a look at the cabbage cultivation methods and their technical points, we hope it can help you.

In the process of raising cabbage seedlings, it should not be kept at low temperatures for a long time. When the early cabbage has 3 leaves or 6 late cabbage leaves, and the stem is thick, it will pass vernalization when it encounters a low temperature of 12 for 25-30 days, or a temperature of 15 days below 9, and early sprouting will occur after planting.

In addition, the seedlings and seedlings can be properly controlled and cultivated to promote root development. Water is indispensable at the seedling stage, and low-temperature training is necessary during drought.

In the production of protected areas, it is necessary to increase the amount of ventilation, uncover the plastic film or straw curtain and other coverings, control the temperature at 13-15 during the day, and control the water. If the seedlings are raised in the nutrient soil block (earthwork), the mounds should be cut and hoarded for low-temperature exercise, so that the seedlings have strong stress resistance, and the seedlings are slow and fast after planting.

After cabbage planting, it should be watered in time to improve the survival rate of seedlings, and the ditch should be cleared and drained during the growth period to keep the root system well developed. In time, the plant stem is thick and the plant is lush. At the same time, it can improve the ability to resist disasters, reduce the amount of pesticides and fertilizers, and reduce residual toxicity.

After planting, do not let out the wind, start to release the wind after the seedlings are slow, and control the temperature in the small arch shed to be 20-25, and more than 25 to let the wind out. Do not water during the growth period of the outer leaves, strengthen the wind, and when the outside temperature has fully met the needs of cabbage growth, the small arch shed is wrought.

When the leaves are curled inward and begin to form balls, top dressing is irrigated, and 30kg of ammonium sulfate or ammonium bicarbonate is applied per square meter. After starting to irrigate, keep the soil moist often. The harvest date can be about 25 days earlier than that of open cabbage.

Due to the different harvest periods, the northern spring cabbage is very different, and in recent years, it has developed a small arch shed short-term cover cultivation on the basis of mulching early cultivation. The planting period can be more than 20 days earlier than that of open field cultivation. The varieties mostly use Zhonggan No. 8, with 7-8 leaves at a seedling age.

Apply 5000kg of agricultural fertilizer per square meter in the 2m wide furrow, turn the rake deeply, open 6 ditches, plant mountains or seedlings according to the plant spacing of 33-35cm, fill the planting water, and insert the skeleton cover film after sealing.

The main insect pests of cabbage are: diamondback moth, cabbage worm and aphid. Diamondback moths nibble on leaf balls and eat leaves, and aphids suck the sap. For the control of cabbage worm and diamondback moth, 800 times the liquid of trichlorfon spray can be used, and green worm fungus can also be sprayed to treat insects.

To control aphids, you can spray with 800 times of 20% dimethoate emulsion.

Hello, cabbage insect pests include cabbage 2113 green worms, diamondback moths and aphids. The control of 5261 insects next to the cabbage bend can be used in the peak larval occurrence period of 4102, using emamectin benzoate microemulsion 1653 doses of 2000-3000 times liquid, 20% fenvalerate emulsifiable concentrate 1000-2000 times liquid, 5% cypermethrin emulsifiable concentrate 1000-2000 times and other agents; In the peak larval stage, 1% emamectin benzoate microemulsion 1000-2000 times, high-efficiency cypermethrin emulsifiable concentrate 1000 times and other agents can be used; The control of aphids can be sprayed with 50% aphid pine emulsifiable concentrate 1500 times, 20% fenvalerate emulsifiable concentrate 1000 times, 50% anti-aphid wettable powder 1000-2000 times and other agents during the peak period; All prevention and control agents are generally sprayed once every 6-7 days, and sprayed 2 or 3 times in a row.

<> black spot disease mainly harms leaves, it can be sprayed with 600 times of 80% mancozeb wettable powder, sprayed once every 7 days, and continuously controlled 2-3 times. Black rot mainly harms leaves, bulbs and leaf bulbs, and can be sprayed with 50% Sukrin wettable powder 1200-1500 times, sprayed once every 5-7 days, and sprayed 3-4 times continuously. Cabbage insects damage leaves, can be sprayed with 40% chrysanthemum emulsifiable concentrate 2000-3000 times.

1. Black spot disease

1. Mainly harm the leaves, but also can harm the petioles, peduncles and seed pods, when the disease is serious, a number of disease spots on the leaves converge into large spots, resulting in the leaves turning yellow and dry, and causing leaf rot when the humidity is high.

2. At the early stage of the disease, 500 times of 64% alum wettable powder, 500-600 times of 75% chlorothalonil wettable powder, 400 times of 40% gramidan wettable powder, 600 times of 80% mancozeb wettable powder, 1000-1500 times of 50% propoxymethane wettable powder, and 800 times of 50% Lide wettable powder were sprayed for prevention and control, spraying once every 7 days, and 2-3 times of continuous control.

2. Black rot

1. Mainly harm leaves, bulbs, leaf balls, there are irregular light brown lesions on the leaves, the lesions will gradually spread and expand to cause the surrounding tissues to turn yellow and die, when the environment is dry, the leaf lesions are dry and brittle, but there is no odor, when the humidity is high, the disease part rots.

2. In the early stage of the disease, timely drug prevention and control can be used to spray 72% agricultural streptomycin wettable powder or neophytomycin 2000 times, 30% copper succinate wettable powder 500-600 times, and 50% Suklin wettable powder 1200-1500 times, spray once every 5-7 days, alternate medication, and spray 3-4 times continuously.

3. Cabbage worms

The insect eating amount of cabbage above the age of the elder state increased significantly, and the leaves were eaten into holes or missing carvings, and in severe cases, the leaves were eaten up, leaving only leaf veins and petioles, which affected the growth and development of the plant and the core.

2. You can choose 10% cypermethrin EC 2000 3000 times, 40% chrysanthemum EC 2000-3000 times, 5% Nongmengte EC 3000 times, 50% phoxanthion EC 1500 times, 10% Uranus EC 8000-10000 times, Kung Fu EC 4000-5000 times, 20% 2000-3000 times of 20% Emulsifiable Concentrate, 20% Mapelik EC 3000 times, 21% 4000-5000 times of emulsifiable concentrate and 2000-3000 times of 25% Jule emulsifiable concentrate are sprayed for prevention and control, sprayed once every 10-15 days, and sprayed 2-3 times in a row.

Soft rot:Reasonable crop rotation in the field to reduce pathogens in the soil; Select the seeds of disease-resistant varieties, and sterilize the seeds with pesticides before sowing cabbage. When diseased plants are found in the field, they can be treated in time, and when the disease is serious, they can be sprayed with hydromycin and streptomycin.

Black Spot Disease:Select seeds of disease-resistant varieties and disinfect them with pesticide dressing before planting. When cabbage is sick, it can be sprayed with chlorothalonil, benomefen and other agents.

Black shin disease:Pay attention to reasonable crop rotation in the field, disinfect the soil and seeds before planting, and use methyl tobuzin and other agents to prevent and control cabbage.

Precautions for cabbage planting.

Generally, the early-maturing varieties with a short growth period are selected, and the single ball of cabbage weighs about 1kg, and it takes about 45 days from planting to harvest, which can not only suit the consumption habits of consumers, but also do not affect the sowing period of the next cropping overwintering vegetables, such as Dutch cabbage.

Timely sowing: the seedling stage of cabbage is not strict for the temperature requirements, but the pilling stage is very strict for the temperature requirements, the temperature should be about 17 to be conducive to the formation and growth of leaf balls, so the summer sowing time of cabbage is about late July.

The main insect pests are diamondback moth, cabbage worm, cabbage armyworm, cabbage aphid, etc.

The main insect pests are diamondback moth, cabbage worm, cabbage armyworm, cabbage aphid, etc.

Spodoptera exigua can be controlled with avermectin, chlorpyramide, cypermethrin and other agents.

Cabbage aphid can be controlled with imidacloprid, anti-aphid, acetamiprid, and other agents.

Diamondback moth can be used with avermectin. high-efficiency cypermethrin, and other agents.

Chlorpyrifos, avermectin and other agents can be used for cabbage worms.

You are welcome.