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How to prevent and control dry rot in apple cultivation
Apple dry rot, also known as trunk rot, is one of the important diseases of apple trees. 1. Symptoms When young trees are affected, dark brown to blackish-brown lesions initially form near the grafting site, spreading upward along the trunk and potentially causing death in severe cases, with many raised small black dots on the lesions.
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How to prevent and control jujube witches' broom disease when growing jujube trees?
Recently, many readers have consulted us: their jujube trees are harmed by jujube witches' broom disease every year. What is going on? How should it be prevented and controlled? To address these questions, the reporter interviewed Feng Yibin, a researcher at the Zhengzhou Fruit Research Institute of the Chinese Academy of Agricultural Sciences.
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Prevention and Control Methods for Bark Cracking and Trunk Dehydration in Young Jujube Trees
Yining County once developed jujube trees on a large scale. In years with heavy winter snowfall, when the snow melted in early spring, the trunk below the snow line (about 20 cm high) was soaked by melting snow water and exposed to wind, causing rot and bark splitting, which blocked the tree's vascular tissue and led to drying and death.
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How to prevent and treat jujube witches' broom disease? Essential methods for anyone growing jujube trees
Jujube witches' broom disease is a viral disease caused by mycoplasma-like organisms, transmitted by leafhopper insects such as the round-spotted leafhopper, or through infected root, stem and leaf seedlings or the graft buds and rootstock of grafted seedlings. It is fairly common in affected regions and often becomes the "cancer" of jujube cultivation. At present there are several treatments
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How to prevent and control infectious gummosis in peach trees
It is a disease caused by a fungus of the Ascomycota subphylum. It mainly harms branches and trunks. When it occurs on 1-year-old young shoots, small protrusions first appear centered on the lenticel layer, later forming tumor-like protrusions 1 to 4 mm in diameter, and no gum flows that year. By early April of the following year, the tumor
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How to prevent and treat peach tree chlorosis? A full breakdown of practical methods
1. Causes 1. Iron deficiency The main causes of iron deficiency in protected-cultivation peach trees: ① Planting density is high, some even reaching 1 m by 0.8 m, the land nutrient area occupied by each tree is small, roots cross each other, and the iron ions released in the soil cannot meet the absorption needs of the root system.
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How to prevent and control anthracnose in peach trees? These methods are very practical
Along with the adjustment of the agricultural industrial structure, the planting area of peach trees in our county has continued to expand. Due to the influence of various factors such as climatic conditions, varieties, and management, peach anthracnose occurs rather severely and has a relatively large impact on peach yield and quality. Effective prevention and control of anthracnose is very important for increasing yield
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How to prevent and control brown rot in papaya cultivation?
1. Symptoms: Brown rot mainly damages the fruit, but can also damage flowers and young shoots. When the fruit is affected, small brownish, nearly circular spots appear first. As the disease progresses, the spots keep expanding. Under suitable conditions, the spots quickly spread over the entire fruit surface and gradually extend into the flesh. In severe cases, the entire fruit rots. After the diseased fruit loses water, it becomes a brown mummified fruit that hangs on the branch and does not fall for a long time. The pathogen on the pedicel or fruit infects the branches, forming brown canker spots, which affects the normal transport of nutrients and water, inhibits the growth and development of the branches, and causes the branches to die.
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How to prevent and control pomegranate brown spot? A detailed guide to practical methods
Distribution and harm: It occurs in all pomegranate-producing areas in China. It mainly harms leaves and fruits, causing early fruit drop and leaf drop, and causing varying degrees of loss to pomegranate production. I. Symptom identification After leaves are infected, small dark brown spots appear at first, then expand into nearly round
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How to prevent and control gummosis in cherry trees? Growers need to master these methods
Symptoms Gummosis is an important disease of cherry trees, and its symptoms fall into two types: dry rot type and canker type gummosis. The dry rot type mostly occurs on the trunk and main branches. In the early stage, the lesions are irregular, dark brown, and hard on the surface, often causing gumming. In the later stage, the lesions become elongated, dry-shrunken and sunken, sometimes with cracking around them, and densely covered with small black dots on the surface.
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