d ribose supplement,ribose supplement,S-Adenosyl-L-methionine disulfate tosylate,S-Adenosyl-L-methionine Jiangxi Chengzhi Bioengineering Co., Ltd , https://www.chengzhi-bio.com
In winter, fruit trees and plants enter a dormant phase, making it an ideal time to manage pests and diseases. During this period, many pests and pathogens remain in the orchard, offering a perfect opportunity for effective control. To help farmers reduce the risk of infestations next season, the provincial plant protection station has released guidelines on pest control for apple, pear, and citrus trees. These recommendations emphasize proactive winter management tailored to each type of fruit tree.
First, orchard sanitation is essential. Farmers should prune diseased or infested branches, remove weeds, and clear fallen leaves and debris from the orchard. All collected materials should be burned to eliminate potential breeding grounds for pests and pathogens.
Second, deep soil cultivation is recommended. Before the ground freezes, farmers can till the soil around the trees to a depth of 20–30 cm. This helps disrupt the overwintering sites of pests and improves soil conditions. In citrus orchards, adding lime during tilling can neutralize soil acidity and improve its structure, while also killing larvae and worms like fruit flies and winter buds. For pears, tilling combined with autumn and winter fertilization can bring pests to the surface, where they can be eaten by birds or killed by cold weather.
Third, bark scraping is an effective method for controlling pests. In apple orchards, farmers can remove rough bark near the base of the tree to eliminate overwintering pests such as codling moths and spider mites. Any signs of disease, like rot or canker, should be scraped away and treated with a fungicide solution. The removed bark should be taken out of the orchard and burned. After scraping, the trunk should be painted white to protect against sunscald and frost damage.
For pears, old bark can be carefully scraped off using a file or scraper, ensuring not to damage the tender inner layers. This process removes overwintering pests like pear caterpillars and whiteflies. Combining this with pruning allows farmers to remove infested branches and eggs, further reducing pest populations.
Painting tree trunks and main branches with a white wash is another key practice. A common formula includes 10 parts quicklime, 2 parts sulfur, 2 parts salt, 2 parts clay, and 40 parts water. This not only protects trees from temperature fluctuations but also kills overwintering pests like aphids and spider mites. A second application in early spring reinforces this protection.
In citrus orchards, young trees benefit from whitening their trunks and covering the base with straw or plastic to reduce heat radiation and prevent resinous diseases. The whitewash recipe for citrus includes 30 kg of lime, 2–3 kg of sulfur, 0.5 kg of salt, some vegetable oil, and 100 liters of water.
Finally, spraying is an important step. Apple and pear growers can apply 1–2 sprays of 5% diesel emulsion or 5-degree lime sulfur to target overwintering pests like scale insects and mites. In citrus orchards, a 1-degree lime sulfur spray or 50–100 times diluted oil emulsion before harvest and bud break can kill mites and some bacteria. For severe infestations, insecticides like methidathion or rosin mixtures may be used. If gum disease or canker is found, the affected area should be cleaned and treated with a fungicide before sealing the wound with tung oil.