In August and September, Wang Tianjiao enters its most productive phase. During this time, the plant requires a significant amount of water and nutrients, making it particularly vulnerable to various diseases and pests. This period can greatly affect yield if not properly managed. Therefore, it's crucial to implement scientific agricultural practices, focusing on disease prevention, adequate fertilization, and sufficient irrigation to ensure higher production and better quality. The following three key areas should be prioritized:
First, water and fertilizer management.
As the fruiting stage begins, Wang Tianjiao grows rapidly and needs more nutrients and moisture. This period coincides with hot and rainy weather, which can lead to issues like leaf drop, fruit fall, and even plant damage if not handled properly. It is important to maintain consistent water supply and apply 30 kg of a balanced nitrogen, phosphorus, and potassium compound fertilizer per mu. Additionally, using potassium sulfate as a base fertilizer during irrigation can help support plant growth. Foliar sprays containing calcium, magnesium, iron, manganese, and boron are also beneficial. Since peppers are highly sensitive to boron, applying a suitable boron solution can significantly reduce flower and fruit drop, improve fruit set, and enhance overall fruit quality. As the peppers start to change color in the later stages, watering should be carefully controlled. With heavy rains common in August, drainage must be ensured after rainfall to prevent waterlogging, which can suffocate and kill the plants. At the same time, care should be taken to protect the root system during weeding, fertilizing, and other field activities to avoid root damage.
Second, disease prevention and control.
Common diseases during the fruiting period include viral infections, bacterial wilt, scab, anthracnose, and others, all of which can severely impact yield. Early detection and treatment are essential. For viral diseases, a mixture of virus A (600 times dilution), spring (750 times), and zinc sulfate (1000 times) can be sprayed. In case of an outbreak, antiviral agents like Antiviral 400 times or Jin Lei 400 times can be used. Bacterial wilt can be managed by spraying spring at 750 times dilution directly on the roots and stems. Scab can be controlled with spring at 750 times, applied every 7–10 days. Anthracnose can be treated with Fuxing at 8000 times or another suitable fungicide at 600 times dilution.
Third, pest management.
Aphids can be controlled with 10% imidacloprid diluted at 1500 times. Thrips and stink bugs can be treated with 40% acephate at 1300 times. Lepidopteran pests such as cotton bollworms, diamondback moths, and beet armyworms can be managed with 15% chlorantraniliprole at 4000 times. Additionally, aphids can also be controlled with 73% lambda-cyhalothrin at 1000–1500 times dilution. Regular monitoring and timely application of these treatments are essential to keep pest populations under control and protect the crop.
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