What are the control methods for citrus gummosis?
What is citrus gummosis? How do you control citrus gummosis? We also ask netizens with citrus growing experience to help explain. Citrus gummosis, also called resin disease, is a fungal disease, and once it occurs it is very difficult to control. The causes of gummosis are: planting too densely, causing shade and poor ventilation and light penetration, heavy clay soil...
What is citrus gummosis? How do you control citrus gummosis? We also ask netizens with citrus growing experience to help explainCitrus gummosis, also called resin disease, is a fungal disease, and once it occurs it is very difficult to control. The causes of gummosis are: planting too densely, causing shade and poor ventilation and light penetration, heavy clay soil, poor drainage, applying nitrogen fertilizer too many times, unreasonable intercropping, too little spacing between intercrops and citrus trees, and severe disease in hot, rainy seasons. In addition, introducing diseased seedlings and scions from outside is also one of the causes of the disease. Therefore Zhongdiwang has compiled the control methods for citrus gummosis, listed in detail below for netizens' reference.
Control methods for citrus gummosis:
Method 1: For citrus, apply as much bio-organic fertilizer as possible, less nitrogen fertilizer (urea), and more phosphorus and potassium fertilizer.
Method 2: If there are waterlogged areas in the citrus orchard, deep ditches should be opened in time for drainage.
Method 3: When citrus trees with gummosis are found, first scrape off the rough bark of the diseased part, (greenish is ideal), then make several longitudinal cuts deep to the xylem, then apply Bordeaux mixture + thiophanate + "Hushu Jiangjun", to sterilize and disinfect, so that the diseased spots fall off quickly and the wounds heal.
Method 4: If citrus gummosis is severe, the coating and drenching method should be used for control. You can use Bordeaux concentrate at 1000 times or self-prepared 0.6% equal-amount Bordeaux mixture to drench the roots; the water amount depends on tree age: 1 bucket for large trees, half for small trees.
Method 5: Foliar application can be used to control citrus gummosis. Foliar application is mainly for prevention, and it is best to apply before the disease occurs. The agents include: aluminum triethyl phosphonate, metalaxyl mancozeb. For deciduous fruit: spray "Xin Gao Zhi Mo" + insecticide + fungicide, using it 3 times in succession can achieve good results.
Method 6: In winter, take cold-protection measures for citrus trees, such as whitewashing the trunks and banking soil in winter, and apply organic fertilizer once after citrus harvest, which has a warming and cold-protection effect. Combined with pruning, remove diseased and insect-infested branches, dead branches and leggy branches, so that the citrus trees have good ventilation and light penetration and the disease is reduced. After pruning, promptly apply "Yushang Fangfu Mo" to seal the wounds and allow the pruning cuts to heal healthily.
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