Did you encounter any of these strawberry diseases?

The current season of strawberry fruiting is a critical period for ensuring strawberry production. Some time ago, the platform shared the strawberry flower management technology (click to view), but in the actual cultivation of strawberries, there are still some thorny problems, and are now sorted out for your reference.

No flowers

The long leaves of strawberry do not bloom, except for the delayed differentiation of flower buds in some varieties, mainly due to nutrient supply, endogenous hormones, climatic conditions, and fertilization management.

● When nutrients supply strawberry flower bud differentiation, it is at the stage where both vegetative growth and reproductive growth coexist. If the nutrient supply is insufficient, it will affect strawberry flowering.

• Endogenous hormone flower bud differentiation is the result of the interaction between hormones that promote flower bud differentiation and hormones that inhibit flower bud differentiation. Hormones that promote growth generally, such as gibberellins and auxins, are not conducive to flower bud differentiation; hormones that inhibit growth, such as abscisic acid and cytokinins, promote flower bud differentiation.

● Low temperature conditions and short days of sunshine induce flower bud formation. In most strawberry varieties, the daily average temperature drops below 20°C, and flower bud differentiation begins when the sunshine is shortened to 12 hours or less under low temperature and short-day conditions.

● Fertilizer management During the flowering period of strawberry, the demand for phosphorus and potash fertilizer is relatively high. If nitrogen fertilizer is applied to some areas, the strawberry will be prone to be long and is not conducive to flower bud differentiation. Strawberry is not fat, the concentration should not be too high, small meals.

solution

Strawberry does not produce flowers, can be properly removed from the old leaves, foliar spray phosphorus and potassium source library + Difenoconazole, can inhibit excessive strawberry vegetative growth, promote flower bud differentiation, and prevent a variety of diseases.

The fruit and fruit period of strawberry is a very sensitive period. It is easy to produce phytotoxicity and it is usually used before flowering.

solution

After the occurrence of phytotoxicity, the situation is dealt with. If the injury is lighter, it can be sprayed with phosphorus and potassium source and brassinolide to ease, supplement plant nutrition, and restore normal growth; if the situation is more serious (as shown above), Remove the victim's flower, re-accelerate the flower, flush with the sea elf biological stimulant, supplement the nutrition, conducive to flower bud formation.

The dehydration of strawberry leaves is mainly due to the lack of nutrients (calcium, boron, etc.), root problems, and fertilizer damage.

● The main symptom of lack of calcium in strawberry is leaf char, and the lack of boron will affect the absorption of calcium by strawberries and the appearance of coke leaves. When the boron deficiency is serious, the leaves will curl upwards.

● Root problems Strawberry roots are damaged, affecting the absorption of calcium, leading to dehydration of the heart.

● Improper dressing of fertilizer-damaged soil results in soil salinization that dehydrates the heart and leaves; application of unfamed organic fertilizer causes wounds to dehydrate the heart and leaves.

solution

Check the condition of the roots in a timely manner and determine the cause of the disease. If it is caused by calcium deficiency, high-calcium foliar fertilizer can be sprayed to reduce calcium deficiency. In addition, appropriate watering should be timely and ensure the water supply. In case of problems such as roots, sea elven biostimulators can be used to soak the roots to improve the soil environment and promote root development.

Strawberry leaf spot

● produce spot disease

Large spots, irregular shape, high humidity produced gray mold gray mold

Depths of purplish depression, with rosy —— anthrax

The purple-brown small spots are irregular, producing small black spots, and the late leaves yellowish brown withered - brown spot

Spotted round, uniform size, snake-eye-like spot-spot (snake eye disease)

● Leaves do not produce lesions

White powder - powdery mildew

1 to 2 leaves in the leaves yellow, deformity ----- wilt

Strawberries grow slowly. If the ground part is normal, the problem may appear on the roots.

The low temperature olivary photosynthetic product may affect the formation of photosynthetic products after strawberry planting, resulting in underdeveloped root system. At the same time, there may be acidification in the soil, or control of pesticide residues and other factors that affect the root development, resulting in slow plant growth.

solution

Timely inspection of the roots, strengthening of water and fertilizer management, maintaining a balanced supply of nutrients and water, providing suitable temperature and humidity for growth, conducive to plant growth. Foliar can be applied to the source of phosphorus and potassium + brassinolide conditioning, continuous 2 or 3 times, about 10 days.

Strawberry white roots, some dead plants

Root diseases

The less white roots of strawberry, the phenomenon of dead plants is usually caused by root rot, red root column rot or anthracnose, and it is not ruled out by roots.

● If the leaves of the outer part of the ground are yellow, brown, necrotic, and crimped, the possibility of disease is high.

● Check the roots. The roots turn brown and rot. When they are easily rooted, they are root rot or root rot in red columns. The main roots are cut open, and the central column turns reddish-brown into red root column rot.

● The anthrax roots are fresh and difficult to pull up. The red-brown or black-brown lesions are visible from the outside to the inside of the cross-section of the roots.

solution

If the disease is severe, remove it directly and take it away from the shed;

Root rot: In the initial stage, the colostrum copper, Bacillus subtilis, and Chlorobromoisocyanurate can be used as roots, once in 5 days, and 2 times in succession.

Root column rot in the red column: In the initial stage, metalaxyl manganese zinc, dimethomorph, frosturil manganese, etc. can be sprayed or showered.

Anthracnose: At the beginning of the disease, pyraclostrobin, difenoconazole, prochloraz, etc. can be used for prevention and treatment.

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