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Four Practical Methods for Controlling Pests and Diseases in Flowers, Trees and Bonsai
Using pesticides to control pests and diseases in flowers and trees easily pollutes the environment. Here are 4 safe methods for controlling pests and diseases in flowers and trees. 1. Spraying method (1) Mix 0.5 kg of plant ash with 2.5 kg of water, soak for 24 hours, take the filtered clear liquid and spray it, which can kill aphids on plum blossoms, Chinese roses, pomegranate trees, etc. (2) Spray with a 0.1% concentration baking soda solution, which can control powdery mildew on flowers such as Chinese roses, chrysanthemums, garden balsam, cotton rose, and cineraria, with a control rate of over 80%.
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What are the highly effective pesticides for controlling rice skipper?
1. Optimal control period: This should be strictly timed to the peak egg-hatching stage and young larval stage of the rice skipper in the field, that is, July 29 to August 6 is the best period for pesticide application. 2. Targets for control: Rice fields with tender green growth, late transplanting and late development, late development after sitting, and seed-production maternal rice fields are all key target fields for control. 3. Protect natural enemy resources, prohibit the application of highly toxic pesticides, increase the parasitism rate of eggs, larvae, and pupae, and achieve pest control through beneficial organisms. 4. Chemical control: For rice skipper, use Qiansheng 8000 at 50 grams per mu, 90%
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How to effectively control the Schisandra leaf-rolling worm
It occurs from July to August. The larvae are initially white, later turning green. Young larvae bite and feed on the leaf mesophyll; after the 3rd instar they roll leaves and feed, affecting fruit development. Control methods: (1) Before the larvae roll the leaves, spray with 80% trichlorfon at 1000-1500 times dilution. (2) After the leaves are rolled, spray with 40% dimethoate emulsifiable concentrate at 1000-1500 times dilution. (3) Spray with 50% phoxim at 1500 times dilution. (4) Spray with 50% phosphamidon emulsifiable concentrate at 2000 times dilution. (5) Before and after the larvae roll the leaves, they can also be caught by hand.
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A Detailed Guide to Identifying and Controlling Common Pests of Shiitake Mushrooms
1. Mites, commonly known as fungus lice, are divided into two types: flour mites and straw itch mites. Straw itch mites are small and difficult to see with the naked eye; they tend to gather in clusters on the surface of the growing substrate. Flour mites are larger, white and shiny, do not form clusters, and appear powdery when numerous. On shiitake mushroom blocks infested by mites, the mycelium is gnawed on, and in severe cases the mycelium can be eaten completely. If mites occur in the spawn, a cotton plug dipped in 50% dichlorvos can be inserted to fumigate and kill them. If mites appear during the mycelium-running stage, they can be killed by spraying 0.5% dichlorvos, or by spraying a 2000-fold dilution of 25% permethrin-ester compound. If mites occur during the fruiting stage
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Detailed Guide to Controlling the Three Major Diseases of Onions and Garlic
I. Purple blotch. It mainly affects chives, Welsh onions, garlic, onions, and Chinese chives, and is a major disease of Welsh onions and garlic, with leaves and flower stalks being the main affected parts. The lesions are initially water-soaked, grayish white, slightly sunken, and later expand into oval or spindle shapes, becoming purplish brown. When humidity is high, the diseased area produces black mold layers arranged in concentric rings. In severe cases, it causes leaves and stalks to die or break over. The disease occurs severely under warm, humid conditions or when there is a lack of fertilizer and drought. Fields with sandy soil, dry land, and severe thrips damage have severe disease incidence. (1) Agricultural
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Rice seedlings turning yellow, leaves curling, leaf-rolling: what to do? A detailed guide to prevention and control
There are many causes of the rice leaf-rolling phenomenon, and the most common one is the rice leaf roller (Cnaphalocrocis medinalis). Damage characteristics: the larvae bind silk to roll rice leaves lengthwise into larval cases, and the larvae hide inside and feed on the mesophyll, leaving only the epidermis, forming white streaks, which reduces the 1000-grain weight of rice, increases empty grains, and causes yield loss. Control agents: 1. Select rice varieties resistant to (or tolerant of) the pest, fertilize reasonably, so that the rice grows and develops vigorously, and prevent excessive early growth and excessive tillering as well as late-season stay-green and delayed maturity. Manage water scientifically, adjust the drainage (field-drying) time appropriately, and reduce field humidity during the larval hatching period
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Which insecticide is effective for controlling the rice stem maggot?
The rice stem maggot has broken out and caused disasters in most rice-growing areas in China in recent years, making it a serious pest. At present, an insecticide for controlling pests such as the rice stem maggot has been successfully invented. The purpose of this invention is to provide a highly effective and low-toxicity insecticide specifically for controlling the rice stem maggot pest. The insecticide of this invention is prepared by mixing two agents, fipronil and imidacloprid, in a weight ratio of (1:0.1) to (0.1:1), and can be made into various formulations such as seed coating agents, seed dressing agents, suspension concentrates, powders, and emulsifiable concentrates. The advantages are: its insecticidal effect on the rice stem maggot
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What methods are there for controlling the sex of fish?
Controlling the sex of fish is an effective way to increase fish production. Generally, sex hormones can be used to induce the sex of fish to develop in the direction people want. Sex hormones are divided into two types: those secreted by the testes are male hormones, and those secreted by the ovaries are female hormones. The primitive germinal epithelium tissue of fish simultaneously has two components: the cortex, which determines development toward female, and the medulla, which determines development toward male. Under the action of female hormones, the cortex differentiates into ovaries, while the medulla does not develop, resulting in a female with egg-laying reproductive function; conversely, under the action of male hormones, the fish will become male. Therefore, during
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A Detailed Guide to Identifying and Controlling the 28-Spotted Ladybird Beetle on Eggplant
The 28-spotted ladybird beetle on eggplant belongs to the order Coleoptera, family Coccinellidae, also known as the groundcherry ladybird beetle, commonly called "flowered big sister." Its host crops include solanaceous vegetables such as eggplant, tomato, green pepper and potato, as well as cucurbitaceous vegetables such as cucumber. In addition, it can also damage crops such as beans, groundcherry and Chinese cabbage, among which eggplant suffers the most serious damage. It is distributed throughout the country, but occurs in larger numbers and causes serious damage in areas south of the Yangtze River basin. 1 Field identification 1.1 Damage characteristics It damages crops as adults and larvae. Newly hatched larvae
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Detailed Guide to Controlling the Azalea Lace Bug
Hosts and damage characteristics: It damages flowers of the genus Rhododendron and the genus Pieris. It mainly feeds on leaf sap as adults and nymphs, and its excrement causes pinpoint white spots on the upper leaf surface that progress to complete loss of green, while the underside of the leaf turns rusty yellow; the plant's photosynthesis is hindered, growth is stunted, and leaves drop early. Morphology and habits: Adults are small and flat, dark brown, nearly 4 mm long, with membranous forewings covered in a network pattern. The pronotum extends forward to cover the head and also bears a network pattern. In the Guangzhou area, about 10 generations occur per year, and it overwinters as adults and nymphs.
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