The small tigers are not called the silkworms, the cutworms, etc. The algebras vary with the climate of each place. The more algebras occur in the south, the more the rainy and humid climates of the middle and lower reaches of the Yangtze River and the southeast coast and the low-lying sorghum area in the north. It is more serious, and it is very harmful to the seedlings of agriculture and forest trees. If it is light, it will cause the lack of seedlings and ridges. If it is heavy, it will be destroyed and replayed. Let’s take a look at the prevention and control methods of the small tigers!
Small tiger hazard characteristics
Small ground tigers are underground pests that are very harmful to agricultural and forest seedlings. They can harm more than 100 species of plants. In the northeast, they mainly harm larch, red pine, ash, walnut and other seedlings, and harm the masson pine and fir in the south. Mulberry, tea and other seedlings, in the northwest endangered Pinus tabulaeformis, Elaeagnus angustifolia, fruit trees and other seedlings. The 1st to 2nd instar larvae can be clustered in the tender and tender leaves of the seedlings, staying up late for food, and the food intake is small, and the damage is not very significant. After 3 years of age, it is scattered between the dry and wet layers of the topsoil during the daytime. At night, the seedlings are planted from the ground and bitten into the soil, or the unearthed seeds are bitten. The young stems of the seedlings are hardened and then eaten with young leaves and leaves and grown. point. The food intake of 5 and 6-year-old larvae increased greatly. Each larva could bite 4 to 5 seedlings overnight, and more than 10 strains.
The law of small ground tigers
The small earth tigers are seen and harmed from October to April 2, two to three generations in the northwest, two to three generations north of the Great Wall, three generations to the north of the Yellow River to the south of the Yellow River, and south of the Yellow River to the Yangtze River. Generation, four to five generations south of the Yangtze River, six to seven generations in the southern subtropical region. Regardless of the number of algebras in the year, the first generation of larvae caused serious damage in production. Adults in the south of winter have emerged in February. The feudal period in most parts of the country is from late March to mid-April, and Ningxia and Inner Mongolia are in late April. The egg production and egg stage of adults are different in different places. The main reason for the difference in egg stage with the distribution area and generation is the difference in temperature.
Small tiger agricultural control
- Strengthen management: Management of extensive and weedy is the best host to lure tigers to lay eggs and feed on the first stage. The more weeds, the higher the survival rate of larvae and the more harmful it is.
- Use natural enemies: such as bird, bird, cockroach, mole, walking insect, parasitic flies, parasitic wasps and bacteria, fungi and so on. The parasitic rate of parasitic wasps and small wasps in Hangzhou reached 10%.
- Adult trapping: Combine sticky insects with sugar, vinegar, wine lure or sweet potato, carrot and other fermentation broth to trap adult.
- Larval trapping: The larvae are trapped with paulownia leaves or lettuce leaves and caught in the field every morning. For older larvae, you can also check the field in the early morning. If you find broken seedlings, remove the nearby clods and kill them.
Small tiger chemical control
Larval larvae of different ages should adopt different application methods. The larvae should be controlled by spraying, dusting or toxic soil before the age of 3, and the seedlings should be broken after the 3rd age, and they can be trapped by poison baits or poisonous grasses.
- Spray control of small tigers: 750 ml of 50% phoxim emulsifiable concentrate per hectare, or 2.5% deltamethrin emulsifiable concentrate or 40% cypermethrin emulsifiable concentrate 300-450 ml, 90% crystalline trichlorfon 750 g, spray 750 L of water. The spraying should be in place before the worms are 3 years old.
- Poisonous soil control small earth tiger: Optional 2.5% deltamethrin EC 90-100 ml, or 50% phoxim EC or 40% methyl isoflavone EC 500 ml water, spray fine soil 50 kg Poisonous soil, 300-375 kilograms per hectare applied to the seedling roots.
- Poison bait to control small tigers: Generally, the age of the insects can be trapped by poison baits. You can use 90% crystal trichlorfon 0.5 kg or 50% phoxim EC 500 ml, add 2.5 to 5 liters of water, spray 50 kg crushed and fried. On the fragrant cottonseed cake, bean cake or wheat bran, sprinkle a small pile at a certain distance in the affected crop field in the evening, or around the crop rhizosphere, 75 kg per hectare.
- Poisonous grass control small earth tiger: 0.5 kg of 90% crystal trichlorfon, 75-100 kg of fresh grass mixed with 225-300 kg per hectare.
The website of this paper: The prevention and treatment method of the small tiger tiger pest symptom map
Herbal tea is a health drink made from flower buds, petals or tender leaves of flowers and plants after harvesting, drying and processing. There are many kinds of herbal tea with different characteristics. Therefore, it is necessary to make clear the pharmacological and pharmacodynamic characteristics of different kinds of herbal tea when drinking, so as to give full play to the health care function of herbal tea.
The main varieties of herbal tea are chrysanthemum, rose, honeysuckle and so on.
How to brew: Herbal tea is usually brewed in a glass, China cup or pot with a lid and left for 2-5 minutes to release its active ingredients and distinctive floral aroma. But it is not appropriate to drink with zisha pot. Herbal tea belongs to non-fermentation tea, and it is mainly made of young and pollution-free flower buds and petals. The water temperature should not be too high when brewing, and the water temperature should be 80-90℃. Thermos cups are not suitable for brewing herbal tea, because under the condition of high temperature and constant temperature, various vitamins and aromatic substances contained in herbal tea will quickly be destroyed and reduced, and the tea will become dark in color and astringent in taste. In addition, in the process of brewing, the pot and cup should be sealed to reduce the loss of fragrance as far as possible.
Drinking skills: herbal tea is suitable for drinking, should not add milk, no or little sugar, can add a small amount of honey, to maintain the natural flavor.
Storage method: Herbal tea must be properly stored after purchase because it is rich in nutrition, fragrant and easy to be eaten by insects or damp. First of all, sealed packaging to prevent fragrance; Secondly, it should be placed in a cool and dry place to avoid direct sunlight and prevent deterioration and discoloration of herbal tea due to light, moisture and temperature. If the quantity of herbal tea is small, it should also be stored in a freezer bag and used up as soon as possible. The shelf life of herbal tea is generally 2 years, and the freshness period is 1 year. High temperature can also make the deterioration of tea materials, so usually stored in a cool place, but there is no need to put it in the refrigerator, otherwise, it is often easy to condense moisture caused by temperature difference when taking.
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