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Occurrence and Control Methods of the Comstock Mealybug in Pear Orchards
(1) Occurrence patterns The Comstock mealybug belongs to the order Homoptera, family Pseudococcidae. Also known as the pear mealybug, plum mealybug, and mulberry mealybug. It generally produces three generations per year, overwintering as eggs and nymphs in hidden places such as cracks in the rough bark of tree trunks, bagged diseased and pest-infested fruits scattered in the orchard, weeds around the root zone, soil clods, and fallen leaves. Adults and nymphs suck the sap of tender buds, tender shoots, and fruits. Before bagging, it mainly damages tender buds and tender shoots, causing leaves to twist, swell, and shrivel, leading to branch dieback. After bagging, it burrows into the bags to damage the fruit, gathering in the calyx depression and stem depression, secreting white wax powder, contaminating the fruit, and sucking
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How to prevent and control jujube fruit shrinkage disease? Understanding the occurrence pattern is key
Jujube fruit shrinkage disease, also known as jujube iron skin disease, jujube black rot, jujube dry waist fruit shrinkage disease, jujube wilt fruit disease, wu chao, wu luo tou, wu chao, tie jiao, etc., was first officially reported in China in the late 1970s. It is found throughout all major jujube-growing regions nationwide, and its damage is becoming increasingly severe, having already become a devastating disease in jujube production. In recent years, the disease has become increasingly serious in jujube-producing areas of Shanxi Province, becoming an important factor affecting jujube yield and commercial quality. However, current reports on the pathogen and control patterns of this disease are inconsistent, and no effective control method has been found
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How to control the Japanese wax scale on goldenrain tree? First understand its occurrence pattern
The Japanese wax scale (Ceroplastes japonicus Gr.) belongs to the order Homoptera, family Coccidae. Also known as the Japanese wax scale and the jujube armored wax scale, commonly called the jujube louse. When it breaks out over large areas on goldenrain trees, in severe cases the entire tree's branches and leaves are covered with the insects, and female insects attached to the twigs look like snow from a distance. The nymphs suck sap on the leaves, and their excrement covers the whole tree, weakening the tree's vigor and seriously affecting the landscaping appearance. Through two years of investigation and study, the occurrence pattern of this pest was clarified, and a satisfactory control method was found. This pest
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Detailed Explanation of the Occurrence Patterns and Control Methods of the Jujube Inchworm
The jujube inchworm, also known as the jujube spanworm, dingmenchi, or gongyao worm, belongs to the order Lepidoptera, family Geometridae, and is one of the major pests of jujube leaves. I. Occurrence Patterns The larvae damage the tender buds, leaves, and flower buds of jujube. It has 1 generation per year, overwintering as pupae in the soil 10-15 cm deep around the tree canopy. In early March of the following year, they emerge as adults. After mating, they lay eggs. The female adults are wingless and must crawl up the tree trunk to lay eggs. After an egg stage of about 22 days, from late March to early April, the larvae hatch and climb up the tree to cause damage. Larvae in the 1st to 3rd instars have a small appetite and mainly feed on tender leaves.
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Detailed Explanation of the Occurrence Period and Control Measures of Jujube Fruit Blue Mold
Jujube fruit blue mold generally occurs during the storage period of red jujubes. The pathogen is similar to that of citrus blue mold. Jujube fruits are usually infected from the fruit depression or from sunken areas where the peel has breaks. In infected jujube fruits, the flesh rots, the tissue disintegrates, pectin exudes, the peel becomes sticky, and there is a musty smell, affecting quality and edibility. The cause of jujube fruit blue mold is mostly excessive moisture in the jujube fruits and excessively high humidity in the storage warehouse, so the following points should be noted in control measures: A: Red jujube and candied jujube products must be fully dehydrated during storage
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Detailed Explanation of the Occurrence and Control Methods of Peach Tree Gummosis
Peach tree gummosis is a disease commonly occurring on peach trees today, and its incidence is severe. Especially in peach orchards with extensive management and weakened tree vigor, the rate of affected plants can reach over 90%. This disease severely weakens tree vigor, affects yield and quality, and in severe cases leads to dead branches and dead trees, threatening the production and development of peach trees. It is also one of the most troublesome diseases for fruit growers. I. Causes of the disease. There are two causes of peach gummosis: one is non-infectious pathogens, such as gummosis caused by wounds from mechanical injury, insect and disease damage, frost injury, freezing injury, etc., or gummosis caused by physiological disorders of the tree body due to extensive management, excessive pruning, excessive fruiting, improper fertilization, heavy clay soil, etc. The other is infectious pathogens caused by fungi; the sexual stage belongs to Ascomycota, and the asexual stage belongs to Deuteromycota.
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A Detailed Explanation of the Occurrence Patterns and Control Methods of the Jujube Leafroller
The jujube leafroller, also known as the jujube sickle-winged tortrix moth, commonly called the leaf-sticking worm, is one of the important pests of jujube trees. The larvae spin silk to roll leaves for feeding, rolling leaves longitudinally into a dumpling shape, or using silk to bind several leaves together. The larvae also bore into and feed on fruit attached to leaves, greatly affecting yield. 1. Occurrence patterns This pest has 3 generations per year, overwintering as pupae in rough bark crevices on branches and trunks. Adults hide by day and emerge at night, are strongly phototactic, and lay eggs 1 to 2 days after emergence; eggs are mostly scattered on smooth small branches and jujube spurs. The egg stage lasts 10 to 25 days, and the first-generation larvae occur
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Occurrence Characteristics and Control Methods of Pear Orchard Armored Scale
Pear orchard armored scale belongs to the order Homoptera, family Diaspididae, and is a pest that is relatively difficult to control on pear trees. In recent years, through observation, we have basically grasped the occurrence pattern of pear orchard armored scale in the Korla region, and through several years of control trials, we have developed a set of effective control methods. I. Damage Characteristics Pear orchard armored scale mainly damages fruit trees and forest trees. Among fruit trees, it mainly damages the branches, fruits and leaves of pear, apple, jujube, grape, apricot, plum, etc. Branches are often densely covered with many scale insects, and the damaged areas show red round spots; in severe cases, the cortex splits and even dies.
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Detailed Explanation of the Occurrence Patterns and Control Techniques of the Jujube Leafroller
The jujube leafroller belongs to the family Tortricidae, order Lepidoptera. The jujube leafroller damages the leaves, flowers, and fruits of jujube trees, seriously affecting the yield and quality of jujube. The jujube leafroller has a single feeding habit, only damaging jujube trees and wild sour jujube, with larvae feeding on jujube leaves, flowers, and fruits. It produces 3 generations per year, overwintering as pupae in cocoons under old cracked bark and in clods of soil around the trunk. In the following year, eclosion begins in late March, with the peak of eclosion in early April; adults are strongly phototactic, and eggs are laid singly on smooth twigs and leaves. The first-generation larvae hatch in early May (before the Beginning of Summer)
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Occurrence Patterns and Control Methods of Jujube Fruit Shrink Disease
Jujube fruit shrink disease, also known as black rot, is a new disease of jujube trees. When this disease breaks out severely, it has a serious impact on both the quality and yield of jujube fruit. 1. Symptoms: The disease mainly damages the fruit, causing fruit rot and premature fruit drop. Affected fruit first develop a pale yellow halo on the shoulder or body, which gradually expands into sunken, irregular pale yellow lesions; then the peel becomes water-soaked and infiltrated, with scattered needle-like round brown dots, the flesh turns earthy yellow, loose and soft, and the diseased tissue becomes spongy and necrotic, while the outer peel turns dark red and lusterless. Diseased fruit
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