Strawberry is a crop that requires a large amount of calcium. The demand for calcium in the growth process is second only to potassium and nitrogen and is the third most important element. In the fruit-expanding stage, the absorption of calcium by strawberries is second only to potassium. However, in the process of strawberry fertilization, growers often overlook the supplementation of calcium fertilizers, resulting in a variety of physiological diseases.
The symptoms of strawberry calcium deficiency performance are very similar to the symptoms of strawberry virus disease. Many growers can easily confuse the two in the production process, and often take the wrong prevention and control measures, delaying the timing of prevention and control, but leading to an increase in the disease. The following describes in detail the difference between physiological diseases and virus diseases caused by calcium deficiency in strawberry.
The cause of the disease is different
Strawberry calcium deficiency is a physiological disease that is caused by the lack of nutrients. Rational supplement of the required elements, strawberry will resume normal growth; strawberry virus disease is caused by strawberry mottle virus, strawberry vein virus, strawberry light yellow edge virus, strawberry shrinkage virus infection. Once infected, the system becomes ill and control is extremely difficult.
Symptoms are different
Leaf: The most typical symptom of calcium deficiency is commonly known as leaf scorch disease, which usually occurs on new leaves, resulting in leaf tip shrinkage and leaf tip scorch; virus disease leaf manifests as mosaic, yellow, wrinkled and mottled leaves. Reduced, deformed, chlorotic leaves, gradually turned red, eventually leading to death.
Flowering: Calcium deficiency can cause flower buds to scorch, buds become brown, and the buds are dry at the top; after infection with the virus, the flowers do not show symptoms.
Fruit: When calcium deficiency occurs, young fruit will have a stale fruit. In mature fruits, calcium deficiency results in a thin cell wall, a small cell density, a soft fruit phenomenon, poor resistance to storage and transportation, and a reduced fruit weight; the fruits of strawberry virus become smaller and smaller. deformity.
Roots: Calcium-deficient strawberries have short roots, few root hairs, and their root tips turn from yellow to white, and they die in severe cases; strawberry virus disease is mainly characterized by plant dwarfism.
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