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Identification and Control Methods for Green Peach Aphid on Cilantro
Description of Characteristics and Control Methods The green peach aphid, Myzus persicae (Sulzer), belongs to the order Hemiptera (formerly Homoptera; however, Homoptera has now been moved within Hemiptera), family Aphididae. Also known as the greasy bug, tobacco aphid, peach red aphid, and oil bug. The green peach aphid is a polyphagous pest, with host plants numbering approximately 74 families and 28...
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How to prevent and control citrus anthracnose? Mastering these methods is key
(1) Reasonable fertilization. Increase the application of organic fertilizers, such as plant ash and rapeseed cake fertilizer, to improve the physical and chemical properties of the soil and create good conditions for root growth; according to the measured soil properties, carry out formula fertilization with nitrogen, phosphorus, potassium and micronutrients. (2) Reasonable pruning and thinning of branches and fruit. Combined with garden clearing and year-round management, prune diseased and pest-infested branches...
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May control methods for the Chinese citrus fruit fly
The Chinese citrus fruit fly, commonly known as the citrus maggot, and the damaged fruit known as maggot fruit, was a nationally quarantined pest before 2009. It damages four citrus types: pomelos, sour oranges, navel oranges, and mandarins (loose-skin citrus), with sour oranges and sweet oranges suffering the most severe damage. Its larvae tunnel through and feed on the segments inside the fruit, causing the fruit to turn yellow before ripening, with red tinges amid the yellow, and the damaged fruit severely...
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How to prevent and control pear tree canker? Mastering these methods is enough
1. Strengthen the tree to prevent disease: (1) Reasonable load: According to the tree's growth condition and fertilization level, determine an appropriate fruit load. Do not let the tree bear too heavy a load, and even less should you adopt excessive measures such as branch bending and girdling to increase fruit production for short-term gain. Properly thin flowers and fruits so that both fruiting and tree growth are achieved. (2...
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What are the control methods for pear scab?
1. Strengthen orchard management. Pear trees that grow weakly are easily infected by the pathogen. Therefore, applying more fertilizer, especially organic fertilizer, can strengthen the tree vigor and improve disease resistance. 2. Chemical control. Spray once just before the pear trees approach flowering and once when about 70% of the flowers have fallen, to protect the inflorescences, young shoots and new leaves. After that, according to rainfall conditions...
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Detailed Explanation of Control Methods and Technical Key Points for Pear Scab
In the early stage of fruit infection, pale yellow spots appear; after the lesions expand, they become slightly sunken and develop black mold, after which the lesions become corky and cracking appears. Control measures: in the early stage of fruit infection by pear scab, the pesticides to spray include 1:2:200 Bordeaux mixture; 70% thiophanate-methyl wettable powder at 800-1000 times dilution; 50% carbendazim wettable...
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Identification and Control Methods of Tomato Late Blight
Tomato late blight, which vegetable growers call persimmon blight, is a devastating disease of tomatoes. - Symptom identification: The disease can occur in both seedlings and adult plants. When seedlings are affected, dark green water-soaked lesions appear on the leaves and quickly spread to the petioles and stems, making them thinner and dark brown, causing the whole plant to wilt or break at the stem. When humidity is high, the diseased area...
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Chemical control methods for the pear fruit moth
Sex pheromone lures can be hung in the orchard, and the number of trapped moths checked daily; generally, 1 lure per 15 mu of orchard is sufficient. When the number of trapped adults increases sharply, check for egg-infested fruit once every 3 days. When the rate of egg-infested fruit reaches 0.5%-1%, chemical control can be carried out. The main chemicals are: 1. 20% diflubenzuron suspension concentrate or 25% diflubenzuron wettable...
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Control Methods for Pear Aphid Pests on Pear Trees
Pear aphid, also known as pear two-branched aphid or pear leaf-curling aphid, commonly called "greasy bug," occurs in pear-growing areas throughout the country and is one of the major pests of pear trees. When damage is severe, it causes early defoliation, affecting both the current year's yield and flower bud differentiation. This insect belongs to the order Homoptera, family Aphididae. 1. Damage symptoms: Adults and nymphs gather in colonies on buds, leaves, and tender shoots to suck...
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What are the control methods for potassium deficiency in pear trees
Villagers reported that in a pear orchard in a mountain village, some pear tree branches were found to have shortened internodes, smaller leaves that were yellow-green in color, with leaf margins curling upward, browning, and scorching; in severe cases, the entire tree's leaves were like this, resembling fire damage, and it was even more severe on trees in poor, thin soil with exposed roots, affecting tree vigor and yield. Many fruit growers could not figure out...
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