Prevention and control methods:
1. If multiple tree species are planted in a region, if a single development of poplar species is not conducive to disease prevention and control, planting mixed forests (such as mixed with Yangthorn) will not be conducive to disease transmission.
2. A large area of ​​poplar forests with hedgerows or eucalyptus forests at regular intervals (eg, 400 meters or so) can hinder the spread of germs. Once diseases occur, they can be controlled regionally so that they will not be infected. If the poplar forest is relatively small, it is also possible to set up isolation forest belts around it.
3. When planting trees, pay attention to appropriate trees, and select disease-resistant varieties, and use excellent seedlings with good experience and sterility. Reduce rooting when raising seedlings, avoid water loss, trauma during transportation, and protect seedlings when planting to reduce damage. Strengthen the management of young forest tending, such as weeding, loosening soil, wiping buds, timely irrigation and drainage, prohibition of grazing, and prevention of pests and diseases. Pruning should be done in the winter to avoid pruning in the rainy season.
4. The tree trunks are painted white in late autumn or early spring to prevent freezing, sunburn, disease prevention, and pest control.
5. The competent forestry authorities in areas where conditionality or disease is likely to occur should organize the removal of diseased shoots and diseased trees in autumn and winter. The diseased trees and diseased branches that have been removed are all burned and the sources of sterilization are eliminated. During the spring and summer season, owners of forest trees should self-check themselves at any time and find diseased plants and diseased branches to eliminate and destroy them in time. In this way, prevention is the main method, and losses can be controlled in a smaller range.
6. The nursery where the old nursery or vegetable is changed after many years is prone to this disease. If it is found that the disease should be replaced, other varieties other than willow will be planted in this plot. If there is no ground to fall, soil disinfection and poplar cuttings disinfection should be conducted before nursery.
7. For the incidence of sapling trunks, no pathogenic bacteria are found in the roots. They can be treated with flat stubbles and disinfected with chemicals (eg 50% carbendazim). For the treatment of adult diseases, first remove the lesion with a knife, expose the xylem, sterilize with a chemical, apply 10% alkaline water or 25 times carbendazim or thiophanate
Stevia sweeteners are derived from the leaves of the Stevia rebaudiana (Bertoni) plant, an herbal shrub native to South America. The stevia plant has been used for food and medicinal purposes for hundreds of years, and its leaves and crude extracts have been sold as dietary supplements. Purified extracts of the sweet substances found in the stevia leaf, called steviol glycosides, are considered to be generally recognized as safe (GRAS) by the U.S. Food and Drug Administration (FDA). However, whole stevia leaves and crude leaf extracts are not permitted to be sold as sweeteners in the U.S. because there is not enough toxicological information on these products, according to the FDA. Stevia sweeteners are made by extracting steviol glycosides from the leaves of the stevia plant and purifying them to remove some of the bitter attributes found in the crude extract.
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