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What are the characteristics of the black locust seed chalcid, and how can it be controlled?
The black locust seed chalcid mainly damages black locust (Robinia pseudoacacia). Its larvae feed on the seeds inside the pods. Adult: body length about 3 mm, black, antennae yellowish-brown, thorax raised, wings transparent, covered with short spines, wing venation simple, slightly yellow. Egg: spindle-shaped, with a long slender stalk at one end. Larva: mature body length about 4 mm, milky white, head inconspicuous, mandibles brown, body curved. The black locust seed chalcid has 2 generations per year. It overwinters as a larva inside the seed. In the following year it generally pupates between April and May, and adults emerge and lay eggs after early to mid-May
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What pests and diseases need to be prevented and controlled when growing cherry blossoms?
What diseases and pests need to be prevented and controlled when growing cherry blossoms? Please introduce the following diseases and pests that need to be prevented and controlled when growing cherry blossoms: Disease prevention and control. Cherry blossom leaves are susceptible to infection by diseases such as powdery mildew, brown spot, sooty mold, gummosis and root knot disease. If not prevented and controlled in time, it will cause leaves to fall off prematurely, affecting nutrient accumulation, which is unfavorable for flowering next year...
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What common insect pests need to be controlled when growing roses?
What pests need to be prevented when growing roses? Please give an introduction. When growing roses, the following pests need to be prevented: 1. Cnidocampa flavescens (Walker), of the order Lepidoptera, family Limacodidae, also known as the slug moth, octagonal worm, octagonal jar, itching chili, poisonous hairy caterpillar. It is distributed in almost every province nationwide. Besides damaging roses, it also damages crabapple, jujube, redbud, mulberry, ...
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What are the common pests and diseases of cherry blossoms, and how are they controlled?
What are the common pests and diseases of cherry blossoms? Here is an introduction to how to control them. There are many types of pests and diseases affecting cherry blossoms; the common ones are described below: Shot-hole brown spot disease occurs from May to June, with small purplish-brown spots appearing on the leaves, which gradually expand into circular shapes; after the diseased spots dry and shrink, they become small holes. The pathogen mostly overwinters on diseased branches and diseased...
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What diseases need to be prevented and controlled when growing Lilium brownii?
What diseases need to be prevented and controlled when growing Lilium brownii? The diseases to be prevented and controlled when growing Lilium brownii are: Leaf blight: if yellow-brown and red-brown oval lesions appear on the leaves, spray with 1000 times thiophanate-methyl wettable powder, 50% iprodione wettable powder 1500 times solution, or 50% procymidone...
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What pests and diseases need to be controlled in mulberry trees in summer?
What pests and diseases need to be controlled in mulberry trees in summer? Please give guidance. In summer, mulberry trees have the following pests and diseases that need to be controlled: 1. Diseases. Mulberry red rust. The symptom is that after the young buds are damaged, they swell, become deformed and curved, and the surface is covered with small yellow slightly raised spots (aecium). When leaves are damaged, at first circular...
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What pests need to be controlled during aloe cultivation?
What pests need to be controlled during aloe cultivation? Please explain and provide guidance on control methods. The main pests of aloe are red spider mites, aphids, cotton bollworms, and scale insects. These pests mainly damage aloe seedlings or tender leaves, and their occurrence is not large. 1. Red spider mites and aphids: red spider mites and aphids generally occur in spring, summer, and autumn;...
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What pests should be controlled when growing osmanthus trees?
What pests need to be prevented when growing osmanthus trees? Please give an introduction. Osmanthus tree pests include jewel beetles, scale insects, stinging caterpillars and bagworms. Zhongdiwang has compiled control methods for osmanthus tree pests, listed below for everyone's reference. I. Damage and control methods of jewel beetles. Damage by jewel beetles: larvae bore and feed within the bark of branches...
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What pests need to be controlled when planting osmanthus trees?
What pests need to be prevented when planting osmanthus trees? What methods are there to control these pests? We also ask experienced netizens to help introduce them. The common pests in osmanthus tree planting include jewel beetles, scale insects, stinging moths, and bagworms; Zhongdiwang has compiled the harm and control methods of the above pests, listed below for netizens' reference. Jewel...
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