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A Detailed Guide to Controlling Common Pests and Diseases of Osmanthus
How do you control common pests and diseases of osmanthus? Methods wanted. The pests and diseases of osmanthus trees include the following: 1. Leaf spot: it mainly damages the leaves, starting as small brown spots; the lesions are round or irregular, later gray to grayish white in the center with reddish-brown edges, and dark gray mold-like growth appears on the lesions. High temperature and high humidity are often the triggers, and it spreads through wind and rain, causing infection; after October the disease subsides. Control: 1) In winter, prune off diseased leaves and clear away fallen diseased leaves, and burn them in a centralized manner; 2) In early May, spray 1:2:100-200 Bordeaux mixture, after which you can spray 50% benomyl 1000 to 1500 times dilution or pyrazophos 500 times dilution or 70% thiophanate-methyl 1000 times dilution.
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What are the methods for controlling pests and diseases in summer corn at the seedling stage
Which pests and diseases need to be controlled in summer corn at the seedling stage? Please introduce the control methods. The following pests and diseases need to be controlled in summer corn at the seedling stage: 1. Seedling-stage pest control. The main pests at the corn seedling stage are: armyworm, cotton bollworm, small brown planthopper, thrips, Swedish fly, etc. To control armyworm and cotton bollworm, 5% beta-cypermethrin or 2.5% cyhalothrin 50-75 g/mu can be used, sprayed with 30 kg of water. For the control of Swedish fly, when corn has just emerged (i.e. one leaf and one heart), spray 15% beta-cypermethrin·chlorpyrifos emulsifiable concentrate 50 mL per mu. If damaged plants appear in the field, those with severe damage should be pulled out promptly, and for lightly damaged ring-shaped plants, the tip of the plant should be cut off. To control the grain mealybug, use 50% phoxim emulsifiable concentrate 500-1000 mL/mu or 48% Lesiben emulsifiable concentrate 200-400 mL/mu for root drenching.
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What are the methods for controlling pests and diseases of loquat?
What pests and diseases need to be controlled when growing loquat? Please provide an introduction and control methods. The pests and diseases that need to be controlled when growing loquat are: 1. Flower cluster rot. There are many causes of loquat flower cluster rot, but they are mainly due to two aspects: harmful organisms and climate. During the loquat flowering period (September-November), continuous autumn rain and high humidity accelerate the occurrence of flower cluster rot. Especially in the mid-to-late flowering period, the flower axis turns brown, soft and rotten, appearing mushy. When the diseased part is squeezed by hand, a viscous liquid flows out, and in the later stage the flower axis shrinks, dries up and appears wilted.
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Common Diseases and Control Methods for Osmanthus Tree Cultivation in Guangxi
What diseases should be prevented in osmanthus tree cultivation in Guangxi? What methods can be used to control them? Osmanthus is an excellent landscape tree species that combines greening, beautification and fragrance, with both ornamental and practical value. It is also a traditional evergreen aromatic plant in China, widely cultivated in many regions. But in recent years, the damage caused by osmanthus pests and diseases has increased, leading to...
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What are the common pests and diseases during the cultivation of osmanthus trees?
How to grow osmanthus trees? Please guide the cultivation of osmanthus as an evergreen small tree, with varieties such as Jingu (orange-yellow flowers), Yingui (yellow-white flowers), Dangui (orange-red flowers), and Sijigui (pale yellow-white flowers). Osmanthus is not only an important landscaping tree species, but also a famous aromatic plant with high edible value. I. Prop...
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What pests and diseases should be prevented and controlled when growing chives in summer?
What pests and diseases should be prevented and controlled when growing chives in summer? Please explain. Chives should have the following two pests and diseases prevented and controlled in summer: prevent and control Fusarium wilt. In summer and autumn, high temperatures, or hot sun exposure after rain, make Fusarium wilt prone to occur. The symptoms are water-scalded lesions near the ground, and in severe cases the whole plant dies. In terms of management, pay attention to...
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What are the common main pests and diseases of osmanthus?
Potted osmanthus often blooms very little or is slow to bloom. To make osmanthus bloom abundantly with fragrant flowers, you need to master the following main points: variety selection: different varieties of osmanthus do not all bloom at the same time. For example, Yueyuegui, Sijigui and others are early-flowering varieties, with the characteristic of blooming several times a year, some...
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What are the control methods for rice viral diseases?
How do you control rice viral diseases? Please explain the methods. Rice viral diseases occur in explosive, intermittent and migratory patterns. The severity of rice viral diseases is closely related to the cropping system, the population size and migration patterns of transmission vectors, climatic conditions and cultivation management measures. Control should implement the plant protection policy of "prevention first, integrated control"...
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What diseases need to be prevented and controlled in the cultivation of yardlong beans?
What diseases need to be prevented and controlled in the yardlong beans being grown? Please give an introduction. The main diseases of cultivated yardlong beans are as follows: 1. Identification and control of cercospora leaf spot. 1. Symptoms: It mainly damages leaves, stems and vines, and pods. In the early stage of the disease, purple-brown spots appear on both sides of the leaves. After they expand, they become nearly round dark brown lesions, 1~2 cm in diameter...
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How to prevent and control aloe pests and diseases? A full breakdown of practical methods
What should you do if you want calla lilies to bloom more? What techniques are needed to make calla lilies grow vigorously and bloom more? You must follow their habits and do the following: ① Plant them in fertile, loose, slightly acidic sandy soil, with a pH value of about 5.5-7. Calla lily growth mainly relies on base fertilizer; during the growth process, lack of fertilizer or excessive fertilization will both cause...
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