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Symptoms, Identification, and Control Methods of Rose Rust
Rose rust occurs in climatically suitable regions around the world. It sometimes causes severe damage to greenhouse-cultivated roses. In addition to roses, the disease can also infect rugosa roses, wild roses, and other flowering plants. Pathogen: Rose rust has many pathogenic species; 10 species have been reported abroad and 3 species are known in China. Among them, Phragmidium montivagum (Pers.) Schlecht. is the main pathogen, belonging to the phylum Basidiomycota, genus Phragmidium.
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What are the control methods for the rose long-tube aphid?
The rose long-tube aphid belongs to the order Homoptera, family Aphididae. It damages roses, multiflora roses, 'Shijiemei' roses and others with nymphs and adult aphids; the affected young leaves and flower buds stop growing and are difficult to extend, and the honeydew excreted often sticks to the leaves, reducing their ornamental value. 1. Morphological characteristics: The wingless parthenogenetic female is relatively large, body elongated-oval, 4.2 mm long.
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What are the control methods for rose black spot disease?
Black spot disease mostly occurs in the hot and humid rainy season. Purple-brown round lesions appear on the upper surface of the leaves, with slightly ciliate edges, and many small black dots grow in the center. These small black dots are the acervuli of the pathogen. After the small black dots crack open, spores are released, causing the disease to spread, and it can also spread with rainwater. Black spot disease relies on con...
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How to prevent fruit cracking in Feizixiao lychee? A detailed guide to practical control methods
How to prevent fruit cracking in Feizixiao lychee? Which methods work well? To prevent fruit cracking in Feizixiao lychee, you can refer to the following methods for control: 1. Root cutting and girdling: In the later stage of fruit development, using root cutting and girdling of the main branches to weaken root activity is very effective at reducing fruit cracking. But the measures must be timely and appropriate; if excessive...
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How to Treat Potato Early Blight? A Detailed Guide to Prevention and Control Methods
How to treat potato early blight? Please explain the methods. Early blight control is mainly based on chemical fungicides, with protective fungicides applied as sprays. Before the disease appears, 75% mancozeb water-dispersible granules can be used at 180-200 grams per mu, sprayed once every 7-10 days for 3-4 consecutive applications. Antaisheng (propineb) and similar fungicides can also be used...
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How to control scale insects on plum trees? Practical methods here
How to control scale insects on plum trees? Please introduce methods. Plum tree scale insect control methods: 1. Do a good job of winter pruning and orchard cleaning to reduce the population density the following year, and spray 5-degree lime sulfur mixture before bud break. 2. Trunk smearing method for control: ① Apply a 5-fold dilution of commercially available laundry detergent evenly to the infested trunk. ② Mix 5 parts commercially available kerosene, 1 part laundry detergent, and 6 parts water, and apply evenly to the infested trunk...
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A Detailed Guide to Common Pests and Diseases of Rose and Their Control Methods
The rose has a beautiful appearance, comes in a thousand forms, is richly fragrant, and blooms in all four seasons. In particular, it has a great many varieties and is easy to propagate and cultivate. It is praised by people as the "Queen of Flowers" and is one of the ten most famous flowers of our country. However, rose pests and diseases often cause poor growth and even death, seriously affecting its ornamental value.
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How to Prevent and Control Zucchini Flower Rot? A Full Breakdown of Practical Methods
How to prevent and control zucchini flower rot? What methods can effectively prevent and control it? Zucchini flower rot can be prevented and controlled using the following methods: Environmental regulation: First, reduce humidity. Zucchini flower rot occurs easily in low-temperature, humid greenhouse environments, so environmental regulation should focus mainly on heat preservation and humidity reduction. Since the fruiting period of zucchini...
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Prevention and Control Methods and Technical Key Points for Flower and Fruit Drop in Zucchini
How to prevent and control flower and fruit drop in zucchini? Please advise on methods. Flower and fruit drop in zucchini can be prevented and controlled by referring to the following methods: Strictly control temperature. During the flowering and fruiting period of zucchini, keep the temperature inside the greenhouse at around 26°C during the day and no lower than 15°C at night. Remove and cover the straw curtains in a timely manner. Remove and cover the straw curtains in a timely manner to extend...
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What are the control methods for peony brown spot disease?
Peony brown spot disease is a common disease in the late growth stage of peonies. Symptoms: pale white spots of varying sizes appear on the leaf surface, generally round spots 3-7 mm in diameter. A leaf may have as few as 1-2 spots, or as many as 30. The center of the spot gradually turns brown, with very tiny black...
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