Why do carrots turn yellow in the garden: what to do, reasons

Often people grow vegetables (cucumbers, tomatoes, carrots, etc.) in the garden not only for sale, but also for pleasure. However, gardening ceases to be a pleasant hobby if, for example, the leaves of carrots turn yellow. Consider why such a nuisance happens and how to solve the problem with a minimum of financial and physical costs.

Causes of yellow leaves of carrots

Main causes of yellowing leaves and roots:

in autumn, at the very end of the growing season, the tops of carrots turn yellow and dry;
this may be due to too hot weather;
underwatering or overwatering;
with a lack of mineral fertilizers - in this case, add phosphorus, potassium, nitrogen to the soil;
due to oversupply of fertilizers;
if carrot varieties are incorrectly selected, for example, they are not suitable for planting in this area;
carrot leaves turn yellow if there were frosts at night;
with improper care of plants, if weeds are not pulled out in time;
carrots can get fungal diseases.

Diseases

Let's consider the most common ailments of garden vegetable crops and methods of treatment and prevention of plants.

Leaf spot (Cercospora)

Round yellow and brown spots appear on the leaves.On the petioles of the leaves, the spots are somewhat oblong and depressed. Further, the carrot leaves turn black, and then rot completely. The reason for this is cercosporosis. With leaf spot, root crops remain small, curl, and become ugly.

The disease may not occur if you loosen the soil between rows in time, spray carrots with decoctions of horsetail or celandine. Most fungal diseases do not occur if the soil is limed.

To prevent cercosporosis, carrot seeds are heated in hot water at a temperature of +60 °C. Young tops are sprayed with Bordeaux mixture (1%).

White Spot (Septoria)

Diseased foliage curls and dries. Septoria affects carrots in cloudy, cold weather. This occurs most often in autumn and spring. The disease can occur due to an excess of nitrogen and manure.

Phomosis (dry rot)

The disease appears in the root crop in the fall.The causative agent - is a fungus that overwinters in seeds, in the remains of tops, in root crops. First, the top of the root crop is affected, then the entire vegetable becomes ill. Small depressions are visible on it, brown with black specks - these are spores. The disease begins to activate after the storage of carrots. It is very difficult to cure the disease, it is easier to follow the prevention.

Get the tops off the ground. Before sowing seeds, pour potassium and phosphorus into the ground. Place the seeds in a solution of potassium permanganate, then germination will be better. After digging up the root crops, cut off the tops from them. Do not store carrots that have brown spots.

Bacteriosis

A yellowish border and spots are visible on the tops. Further, the spots become darker, but they still have a yellowish border. Then the disease passes to the petioles and root crops. Brownish stripes are visible on the petioles, and the entire root crop is covered with ulcers and specks.There is a strong smell of rot.

So that the plant does not get sick, the seeds are placed for 10 minutes before planting. into hot water. When sprouts appear, they are treated with a fungicide on the 20th day.

Alternaria (black rot)

The disease can be transmitted from contaminated land and seeds. The foliage darkens, curls and dries. Then alternariosis passes to cuttings, and then to root crops. They become bitter, blackish spots are visible on them. Before the foliage has completely dried out, spray the plantings with fungicides.

Powdery mildew

Foliage that gets sick with powdery mildew has a whitish coating. Carrot tops become brittle. The disease occurs due to lack of top dressing and lack of moisture in the heat. From powdery mildew, plants are treated with fungicides.

Seeds are disinfected and heated before sowing. The earth and foliage are treated with fungicides. Fertilizers are applied to the soil.

Other reasons

Carrots can be attacked by harmful insects.

Carrot flies

Carrot fly larvae overwinter in the ground in autumn, and begin to emerge in spring. The fly lays eggs in the ground, and its larvae begin to gnaw on carrots, which makes the vegetable bitter. Foliage changes color from greenish to reddish.

To prevent a pest from appearing, pull out weeds and thin out seedlings, treat with fungicides in spring and summer. Sprinkling beds with tobacco mixture, slaked lime and ash helps well.

Carrot blotches

These are small insects, similar to flies, but with hopping legs. Very often they appear in areas near which pines and spruces grow. Insects lay their eggs in the foliage of carrots. Larvae hatch from them, which begin to drink juices from the tops. As a result, the leaves will turn yellow and dry.

To scare away psyllids, spray plants with tobacco infusion, soapy water, plant beds of onions and carrots alternately, put fresh sawdust mulch on the ground, plant mustard near carrots.

Knot nematode

The gall nematode is a small whitish round worm. The worms grow rapidly in moist soil and lay their eggs in the root system. In case of damage by pests, a solution is poured onto the ground, adding 1 tablet of Decaris to 1 liter of water.

Possible infection with mole crickets, winter scoops, slugs and wireworms.

Fungicides that use

The most widely used are Fundazol, Prozaro and Falcon.

The first time is processed 2 weeks after the appearance of the first shoots, the second time - if the carrots are sick.

Advantages of systemic fungicides:

Carrots absorb fungicides fairly quickly and last a very long time;
their impact is independent of the weather;
they are easy and convenient to use.

When applying, observe safety measures and the following rules:

treat as soon as disease is discovered;
pull out weeds with flowers before spraying to avoid destroying bees;
do not apply fungicides on cloudy or windy days;
do not store the fungicide solution, but use it on the day of preparation;
when spraying, wear a suit, mask, gloves;
make the solution in strict accordance with the instructions.

Prevention measures

You should plant carrots one year, and plant peas, beans, soybeans, beans, beets, tomatoes the next year.

The ground should be light and have good drainage. If the earth has acidic characteristics, then add dolomite flour.

When digging the soil, add phosphorus and potassium. You can pour a weak pink solution of potassium permanganate or Fundazol on the sprouts. Plant onions and garlic near carrots - these plants repel harmful insects.

Before sowing, dip the seeds in hot water at a temperature of up to +60 ° C for 10 minutes. Don't forget to foliar your plants by diluting 0.4mg of borax in a 10 liter bucket of water.

Now you understand why the carrots turn yellow in the garden and what to do. The main thing is to follow the correct agricultural practices, prepare the seeds, that is, put them in hot water and a solution of potassium permanganate, feed the plants in time, pull out weeds, and water them properly.