Currently is the period of strawberry seedlings bloom. As the weather is hot and rainy, the strawberry seedlings are prone to diseases such as anthracnose, Spodoptera litura, and silkworm, and germinate. To ensure the normal propagation of strawberry seedlings, we must guard against outbreaks of anthracnose and other diseases and pests. Important. To this end, it is required that all strawberry nursery households carefully inspect the occurrence of pests and diseases in the strawberry seedlings and do a good job of prevention and control. First, the disease identification 1, anthrax: strawberry anthracnose occurs mainly in the nursery period, is now mainly damage stolon, petiole. Occurrence of hazards Initially produce spindle-shaped or oval lesions, 3 to 7 mm in diameter, black, ulcerated, slightly concave; when lesions on stolons and petioles expand into an annular ring, parts above the lesions are wilted and dead, when humidity is high Red mucinous spores can be seen in the disease department. In addition to causing local lesions, the disease can easily cause the wilting of the entire strawberry seedling. The initial 1-2 episodes of spreading leaves lose water and hang down, and return to normal in the evening or cloudy days. As the disease progresses, the whole plant withers. The pathogen is a high temperature and high humidity environment and is a typical high temperature disease. The young tissues of strawberry pods or near the ground are susceptible to infection by bacteria. Between July and September in high temperature and high humidity conditions, germs spread quickly and can cause devastating losses in a short period of time. 2, Spodoptera litura: larvae eaten strawberry leaves, the leaves can be eaten into small holes or nicks, severe when the leaves can eat, and damage the young stem or feeding plant growth point. When the density of insect populations in the field is too high, the larvae have colony migration habits. 3, stiff seedlings: the performance of plant dwarf, such as growth stagnation, sting stems and seedlings less hair extraction phenomenon. Second, prevention and control measures 1, anthrax prevention and treatment: In the early stages of disease can be used 25% Scheringer EC 1000 times, or 20% Longke 500 times, or 80% of Dasheng M-45 WP 700 times spray, Continuous control 3 to 5 times. 2. For the prevention and control of Spodoptera litura, strawberry seedlings should be inspected frequently and found to be timely sprayed when found to be infested; 3. Prevention and control of the silkworm, a small amount can occur in the early morning in the digging of soil next to the damage of the strain to remove, the agent can be used to dip insects 800 times 2 times. 4. In case of stiff seedlings, rooting agent can be used to irrigate the roots 1000 times, once every 10 days, and continuously apply 2-3 times. Such as lack of fertility, can be appropriate to add 3-4% superphosphate fertilizer irrigation. In addition, it is now an important season for the development of strawberry seedlings. It is necessary to promptly do a good job in flood prevention and drought relief, weeding, weeding, plant sorting, and fertilizer and water management. Finally, to remind the red cheek strawberry growers that they must pay attention to the coverage of the sunshade net, and must not be paralyzed and cause serious losses.
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