Strawberry is a sweet and sour fruit. Why do varieties degenerate when strawberries are planted?

Strawberry is a sweet and sour fruit. Why do varieties degenerate when strawberries are planted?

Strawberry friends all have the experience of growing strawberries all the year round. If they plant the same variety all year round or change varieties less frequently, the yield of strawberries will decrease year by year or become unstable. These are actually manifestations of sexual degeneration. What is the main reason?

Viral diseases lead to species degradation. With the increase of reproductive algebra, viruses are also accumulating. Many times, we don't know how many generations of strawberry seedlings have been propagated, and the virus brought by the old mother plant is also constantly multiplying. There are dozens of strawberry viruses, among which there are four kinds of strawberry virus diseases in China, namely strawberry vein mosaic virus, strawberry mottle virus, strawberry yellow edge virus and strawberry shrink virus. In the process of strawberry cultivation, various variations will occur. Mutations that meet our needs are called good changes, and mutations that do not meet our needs are called bad changes. If we don't pay attention to eliminate deterioration in time and mix it with the original variety for a long time, the purity of the original variety will not be maintained, which will lead to the decline of yield, the deterioration of fruit quality and the weakening of plant stress resistance.

How to prevent species degradation

Although individual breeding can indeed reduce the cost, the problem of variety degradation has seriously affected our self-pollination ability. After all, a good seedling produces a good seedling, and half the harvest. The quality of seedlings is directly related to the yield and quality of strawberries. High quality and strong seedlings are the key to obtain the greatest economic benefits in strawberry cultivation. Therefore, the following measures should be taken to prevent strawberry varieties from deteriorating. One is to establish a virus-free nursery base when conditions permit. This is an effective measure to prevent the variety degradation caused by virus infection. Virus-free seedlings will be infected again during cultivation, so virus-free seedlings need to be replaced after 3-4 years of use.

Second, when raising seedlings, ordinary growers can buy virus-free seedlings from relevant agricultural scientific research institutions and cultivate the second generation seedlings. However, the introduction of virus-free seedlings is not once and for all, and the excellent characters of virus-free seedlings will gradually disappear after 3-4 years. Therefore, seedlings should be updated every 3-4 years. At the same time, attention should be paid to the prevention and control of pests, especially aphids are the carriers of viral diseases.

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