Adjust measures to plant good virus-free strawberry

Virus disease is an important disease of strawberry. The effect of drug control is poor. The selection of virus-free strawberry seedlings is the key to disease prevention. Production practices have shown that virus-free vaccines not only have a strong growth, but also significantly increase production and quality. It was determined that compared with virus-inoculated seedlings, the plant height of virus-free seedlings increased by 17.7-46.2%, the development degree increased by 49-76.6%, petiole length increased by 14.5%-41.9%, the number of stolons increased by 26.7-89.5%, and the first inflorescence result volume Increased 21.1-36.1%, single fruit weight increased 1.6-24.1%, soluble solid content increased 13-15.3%.

The growth characteristics of virus-free strawberry seedlings are different from those of virus-infected seedlings, and it is beneficial to fully utilize their advantages to ensure high yield and quality. (1) The virus-free seedlings are strong in fertility and are resistant to fertilizers. However, it is generally not suitable to apply topdressing before the flower buds are differentiated in order to avoid the delay of flower bud differentiation. If necessary, measures such as cutting roots and removing old leaves may be adopted to adjust the ratio of carbon to nitrogen in the body so that the flower bud differentiation period is advanced. Don't over-fertilize during the growth period, so as not to affect the fruit setting. (2) The virus-free seedlings are thick and tall and should be sparsely planted. (3) The flowering period of the virus-free seedlings was delayed and the harvesting period was postponed accordingly. However, the early yield and total yield were still higher than those of the virus-inoculated seedlings. As the number of fruit on the inflorescence increases, attention should be paid to moderate sparse fruiting and fruit growth.

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