Common diseases and insect pests of carrots and their control methods

Carrot is a kind of vegetable that we often eat. Its carotene and vitamin content are very large. If we eat it raw, we can take more vitamins, but many people can't get used to it. Now the planting area of carrots in our country is very smooth. Because of its strong adaptability, it can be planted anywhere, plus its resistance is very strong, rarely the disease. However, what the pro-agricultural network brings to you today is some of its common diseases and insect pests and methods of prevention and control. I hope you can be beneficial to you.

1. Black spot

Because carrots are mainly edible roots, many diseases occur in the roots, and so is black spot, which mainly harms the roots of carrots, but the leaves and stems also have certain effects. Black rot is mainly due to heavy rainfall, more Rain Water in the field, and then did not discharge water out of the field in time, and then high temperature after rain, resulting in bacteria invasion, carrots were infected. The manifestation of the disease is that the roots of carrots slowly appear small black spots, and gradually spread and deepen, resulting in black spots on the leaves of the plant, and in serious cases, the whole plant blackens and dies. We can disinfect the seeds before sowing, which can enhance its immunity. The second is to compare with the field before sowing, and quicklime can be used. Finally, it can be prevented and treated by spraying chlorothalonil at the initial stage of the disease.

2. Black rot

Black rot is what we call soft rot. The cause of black rot is similar to that of black spot, including improper etiquette in the field, but black rot is mainly caused by the weather. generally speaking, there is no rain for a long time and then a sudden rainstorm, resulting in soil uncoordinated, producing bacteria, and then infected with carrots, the plants slowly blacken and rot. The method of prevention and control is to carry out seed treatment when sowing, the second is to maintain the moisture in the field in times of drought, so that the soil has enough adaptability, and it is necessary to discharge the water in time in case of rainstorm, and finally is to carry out chemical control. Agricultural streptomycin sulfate deepable powder 4000 times liquid, or Fengling 200 times liquid, spray once every other week or so, twice.

3. Sclerotinia disease

The main reason for the occurrence of Sclerotinia sclerotiorum disease is that there is too much humidity in the soil and air, coupled with more water in cloudy and rainy days, so the plant absorbs too much water, resulting in brown spots on the stems, leaves, and roots of the plant, and finally the plant slowly softens, there is a white substance, or there is white or gray mold, in fact, the second uncle is similar to rot. Generally speaking, the method of prevention and control is to drain the ditch in the field, reduce the humidity, and then enhance the ventilation in the field, and finally spray it with 2000-fold solution of carbendazim or 1500-fold solution of Hypohydantoin wettable powder.

4. Aphids

Aphids are common pests in many vegetables. they mainly harm the leaves of vegetables and the stems of vegetables. although the edible part of carrots is roots, if the leaves and stems are damaged, the carrots will not be able to carry out photosynthesis. the root length is not large, resulting in a reduction in yield and quality, so the most common way to control aphids is to spray 1500 times of imidacloprid. Two or three times will be fine.

5. Grub

Grub is a kind of pest that lives in the ground, it mainly lives on the roots of edible plants, so it has a great impact on the fruit of carrots. It will slowly eat the fruit of carrots, one by one, and then when you harvest it, there are wormholes everywhere, which is very ugly. The way to control it is to sprinkle a layer of insecticide in the soil. The second is to use 50% phoxim 2500 to 3000 times liquid or Lexben 2000 times liquid to control, the effect is very good, of course, you can also use trichlorfon to control oh.