Control maggots to catch "six clever"

The harm to aphid to plants is mainly through sucking on the back and young stems, growth points, etc. of the young leaves of the plants, causing curling or shrinking of the back of the leaves, so that the growth of the plants is hindered, the growth period is delayed, and a large amount of water is also discharged at the sucking place. Dew, these moisture and dew exposure, impede photosynthesis, reduce production and quality. Aphids are also media for many viral diseases. Winged beaks can fly long distances, mainly to spread the role of spread; wingless grasshoppers are mainly crawling at close range. A nymphs can produce 60-70 larvae for a lifetime. When conditions are right, a generation can be completed in 4-5 days, and 20-30 generations can occur. Therefore, a little attention can be paid to the outbreak of locusts in a short period of time. The characteristics of locust infestation should be highlighted in terms of prevention and control: Cleverness: Reasonable conservation and use of natural enemies of natural enemies Many species of natural enemies are locusts, including grasshoppers, grasshoppers, oystercatchers, calyces, and cockroaches , mold, etc. Where there are locusts, these natural enemies exist, and if there are more natural enemies, they can be controlled. Therefore, when there are not many pods in the field and there are a certain number of natural enemies, never blindly apply drugs to avoid killing natural enemies. Instead, they will incur harm. When the ratio of the total amount of natural enemies in the field to the total number of locusts is within 1:80-100, the field can dispense with pesticides, and it can fully exert its role of eliminating enemies. Two clever: Reasonable fertilization, ensure that crops are robust, stable and long. The locust prefers carbohydrate foods. In the cultivation and management, one-time application of too much nitrogen fertilizer, especially urea, will cause sudden increase of carbohydrates in crops, resulting in short-term locusts Suddenly soared into disaster. Therefore, excessive nitrogen fertilizer application is an effective method for controlling aphids. San Qiao: Seize the wings of the Ruojiao Ruoqiang (ie, stage before the immobility). Prevention and control of aphids mainly depends on the spread of winged moths. Therefore, seize the wings of the winged moths before moving. Conducting prevention and control is one of the economical and effective methods for the treatment of deafness. Four clever: the use of insecticide to control the position of the locust occurs. The locusts generally gather in the tender heads, young leaves, young stems, and the leaves of the plants. Therefore, they should be applied to the young parts of the upper part of the damaged crops to achieve the desired results. Cost-effective. Wu Qiao: Alternating drug use Mites are highly capable of reproduction. They have many generations and are very susceptible to drug resistance. Long-term use of a certain pesticide alone can cure lice, and soon this pesticide has no effect on it. Therefore, the use of pesticides can not be used for a long period of time. Generally, a pesticide can be used twice in the same place at most. This can effectively overcome and delay the development of drug resistance in the locusts, and achieve the purpose of less medication and high benefits. Six clever: Select targeted pesticide species Each pesticide species has its own specific control object. If it is improperly selected, the effect is not good, and it will suffer losses. Pesticides that are effective in preventing and controlling locusts have now been used mainly for net, fast killing, dichlorvos, hyperosmotic monocrotophos, omethoate, dermatophytes, anti-inhibitory agents, and large-working agents. In general, it is better to use a variety of high-quality new pesticides suitable for the local area.

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