How to treat jujube disease

Jujube is a traditional planting plant, several jujube trees can always be seen in front and back of many houses in rural areas, and their fruits are delicious and nutritious, which are loved by many people. As early as July in the Book of Poems, there is a record of "peeling dates in August and harvesting rice in October". So how to treat the disease of jujube tree?

I. Diseases and treatment of jujube trees

The main diseases of jujube are jujube rust, jujube madness, fruit shrinkage disease, anthracnose, ring disease and so on. Different disease treatment methods are different. When jujube tree diseases occur, it is necessary to determine the types of diseases according to specific symptoms for symptomatic treatment.

Jujube rust mainly damages leaves and sometimes fruits. In the early stage of the disease, the back of the leaf mostly scattered light green dots on both sides of the midvein and at the tip and base of the leaf, gradually forming a dark yellowish-brown process, that is, the summer spore pile of rust. The main control measures are to strengthen cultivation and management, not to plant high-stem crops and frequently irrigated crops such as watermelons and vegetables. Sweep the fallen leaves in winter and spring, concentrate on burning, and remove the source of infection. 0.5% urea solution or 0.3% potassium dihydrogen phosphate solution can also be sprayed 2 times for 3 times.

Jujube mad disease is one of the serious diseases of jujube in China. Once the disease occurs, there is little fruit in the following year, and the whole plant can die 4 years after the onset of the disease, mainly as flowers turn into leaves, floral organs degenerate, buds germinate abnormally, and pathological changes will occur in leaves, fruits and roots. The main control measures are spraying 0.2% ferric chloride solution 2 times per 667 square meters of jujube orchard, spraying once every 5-7 days, using 75 kg-100 kg solution each time, and sawing off the diseased branches and roots.

Fruit shrinkage disease refers to the high-lying and uneven surface of mature fruit, some fruits have lost the shape and characteristics of the variety, the pulp of the sunken part of the fruit is brown sponge shape, and some fruits appear cracks on the concave and convex fruit surface. and some fruits become deformed fruits. General bacterial fruit shrinkage disease can be sprayed with agricultural streptomycin 70 to 140 units / ml+ silicone 3000 times. Fungal fruit shrinkage disease can be sprayed with 75% chlorothalonil wettable powder 600x + silicone 3000 times.

Anthrax is caused by fungi, and there are often small black spots on the leaves or branches that are arranged in a wheel and break through the epidermis of the disease. Heavily diseased leaves often have multiple disease spots, resulting in leaf stem withering. The common treatment is to spray 80% anthrax Fumet wettable powder 800 times, 50% Thiram wettable powder 600 times, or 75% chlorothalonil wettable powder 800 times every 7 to 10 days, 2 to 3 times in a row.

In the initial stage of ring disease, purplish red to purple brown frostbite spots will appear on the leaves, and will be irregular after expansion. When part of the disease spot developed to the leaf vein, it withered in the shape of V. The general control method is to spray Baume 5-degree stone sulfur mixture before jujube germination. From the end of June to the beginning of July, spray 50% methyl topiramate wettable powder 800 times, or 50% carbendazim wettable powder 600 times 800 times. Spray alternately with Bordeaux liquid every 15 days or so, and then add 40% Dasheng Mmur45 water agent 600 times 800 times after the rainy season in August.

The above is about some diseases and treatment methods of jujube, we must observe carefully when planting jujube, and take targeted measures to treat the disease after finding the disease.