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How to prevent late spring cold damage during the pear tree flowering period
Spring late cold spells and frosts are very harmful to pear trees. Generally, when pear trees encounter a low temperature of -4.0°C at the bud stage or -2.3°C to -2.9°C at the flowering stage lasting more than half an hour, the flower organs will suffer freezing damage, usually manifested as poor pollination, dried and dead stigmas, and browned filaments or
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How to prevent and control silver leaf disease in pear trees? Growers need to master these methods
In recent years, silver leaf disease has commonly occurred in pear trees in some areas of our city. This disease is a devastating fungal disease, and when it occurs severely, it can cause pear orchards to decline within a few years. After becoming diseased, pear trees weaken in vigor. Yield decreases, and severely diseased trees die 2-3 years later, seriously affecting pear production
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Pear Tree Spring Pest Control Methods and Technical Key Points
Pear tree spring pests and diseases include: pear fruit borer, aphids, red spider mites, pear psylla, stink bugs, leaf-mining mites and black spot disease, etc. Timing and measures of control: from early spring to before flower buds swell, clean the orchard and scrape tree bark. Lay plastic sheeting under the tree, then scrape off the raised and coarse bark on the trunk and large branches, but do not damage the new bark. For the coarse vertical bark at the branch forks, scrape carefully. Collect the scraped bark, larvae, eggs, etc. and bury them deep or burn them. Knock down dead leaves and remaining dried fruit from the tree and remove them from the orchard for destruction, then spray the whole tree once with lime sulfur mixture.
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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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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 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 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 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 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 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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