From the picture, strawberry leaves are withered and lifeless. If you want to grow leaves, you should not only strengthen management, but also know the cause of withering to avoid this kind of phenomenon from happening again. In addition, the management technology of strawberries is attached.

The new leaves turn yellow-green, twisted into boat shapes, and the surface is rough and dull. One or two of the three leaflets tend to become deformed leaves, and the deformed leaves mostly occur on one side of the plant, showing the symptoms of "hemiplegia". Then the lower leaves turn yellow-brown, and the upper leaves dry up from the leaf edge until the whole plant dies. The cross section of the roots, petioles and fruit stalks of the injured plants was cut, and the vascular bundles were browned. The root system decreases, the root turns dark brown and even decays, but the central column does not change color. The difference from strawberry Fusarium wilt is that verticillium wilt does not occur in summer and high temperature season, and the heart leaves are not deformed and yellowed.

1. Strawberry planting techniques and daily management methods

1. Choose suitable varieties or mixed varieties: choose varieties with more flowers, large pollen, large and neat fruits, good color, light sour taste and less deformation.

2. Use disease-free seedlings: disease-free seedlings develop roots, have strong disease resistance, and produce strawberries with high yield and good quality.

3. Apply high-quality base fertilizer: increasing the application of high-quality decomposed agricultural fertilizer can provide sufficient nutrition for strawberry growth, flower bud differentiation, flowering and fruit setting, and increase the content and chroma of fructose. Two thousand kilograms of rotten chicken manure per mu can be combined with gully and watering.

4. implement crop rotation to avoid stubble weight: implement crop rotation can improve the disease resistance of strawberries and reduce the number of deformed and diseased fruits. You can make full use of the open space rotation between sheds.

5. Brightening: insufficient illumination during flowering two weeks before strawberry flowering will affect pollination and fertilization and produce deformed fruits. Lack of light during coloring of fruits will lead to light taste and poor color of fruits. Under the premise of ensuring the temperature in the shed, the covered straw cover should be opened as soon as possible. A reflector is hung on the north side of the shed to increase the light with the reflected light. On rainy or snowy days, incandescent lamps can be used to supplement light.

6. Ridge cultivation and plastic film mulching: Ridge cultivation can reduce the contact between fruit and falling film, enhance the contact between sunlight and fruit, reduce the occurrence of gray mildew and promote fruit coloring. Mulching can increase ground temperature, reduce air humidity, avoid direct contact with soil, and help keep fruit surface clean.

7. Strictly control the temperature: The suitable greenhouse temperature is 22-25 C in the daytime and 8-1 C at night. The fruit swelling period is 2-24 C during the day and 6-1 C at night. High temperature in greenhouse will shorten the growth period of fruit and make the fruit smaller.

8. Appropriate watering and fertilization: appropriate watering after flowering and fruiting, and drip irrigation should be adopted. Insufficient flowering water can lead to poor pollination and fertilization, resulting in abnormal fruit. Lack of water during fruit expansion will affect fruit expansion. The potassium dihydrogen phosphate solution should be sprayed continuously for 3-4 times at flowering stage.

9. Auxiliary pollination: Poor pollination and fertilization are the root causes of abnormal fruits. Using bee auxiliary pollination can effectively reduce the yield of abnormal fruits. Usually, one box of bee powder is put in each shed when flowering.

1, timely control of pests and diseases: strawberry flower spray is easy to induce deformed fruits. If diseases and insect pests occur during flowering, the beehive should be removed from the shed before spraying and then moved back to the shed one week after application.