First, the use of a single drug is difficult to work with fleas. Commonly used lice drugs include imidacloprid, acetamiprid, pymetrozine, nitenpyram and others. Choosing a reasonable formula is the key to controlling locusts.
There are some physical reasons for the resistance to worms. After the peach pods are harmed, besides residual honey nectar, there is a layer of wire mesh covering the young shoots of the leaves. One of the causes of the hard hitting.
Effective formulation: avermectin + nitenpyram + pymetrozine cypermethrin + pymetrozine + imidacloprid 2, Cornell mealybugs Cornella whitefly is not fixed on a specific fruit tree, in apples, pears, Peach, and even grapes, have found traces of it on the top, causing a great deal of damage, and can cause diseases such as coal pollution and coal smoke.
At present, there are no special prevention and control components for the control of K. grandis, and more mixed ingredients are used: chlorpyrifos, buprofezin, pyriproxyfen, fenvalerate, malathion, etc., as well as mixed worms. Ethyl, thiamethoxam.
Third, a variety of carcinogenic insect borers: peach, peach, apple, apple, pear, pear small and so on. The borer borer was very good in prevention and control before, and it was really difficult to prevent it after drilling. This is not to say that there was no resistance before drilling, and the resistance was already very obvious.
Before drilling the file, considering the cost, most people only use the pyrethroids, and some of the slightly known human pyrethrins are used together with the m-dimensional salt. After years of use, the resistance is very obvious and the amount has to be increased year after year.
After drilling, the products with very poor systemic absorption, such as acetoin and pyrethroid, are of course not used. They began to use a wide range of Kang Kuan products. True Kang Kuan and Kuan Kang turned round. The initial effect was indeed good. It is true that the number of years of use is also increasing every year, otherwise it is not easy to use.
Two good single-agent products are recommended: insecticide and fipronil. Although fipronil is forbidden from spraying, it is harmless to use after the orchard has no bees.
Four, pear wood worm, Tenebrio molitor, pear hibiscus, mostly with avermectin and spirotetramat control, long-term use avermectin to produce resistance is very obvious; resistance to spirotetramat, many people may have Did not pay attention.
Spirotetramat is a high-priced product with a pot life of more than one month and avermectin for about 20 days. After a long period of use, the persistence period of spirotetramat is already shorter than that of the previous two or three days. It is difficult to see if you do not pay special attention to it.
Tenebrio is mainly responsible for the increased resistance to imidacloprid. The effect of pymetrozine and thiamethoxam is still good, but the relative cost of pymetrozine is relatively high. The easy photolysis characteristics of thiamethoxam lead to the comparison of its effective period. short. Therefore, the majority of farmers still choose imidacloprid, but the concentration has increased again and again, and the content is getting higher and higher, and the 10% content is not completely eliminated.
5. Malathion is commonly used in green-letter locusts, but resistance is easily produced. Fipronil effect is more obvious. Other compoundings are possible, but the cost is higher.
Sixth, the Hummer Hummer problem is a chronic problem, the general agent is more difficult and effective, the more commonly used is spinosa, but also easy to produce resistance, control efficiency is not ideal, from the beginning of a package Until now, three packs or more, resistance has increased step by step. The biggest problem currently facing is not to fight immortality, but because the duration of effect of the resistance is too short. However, no matter how the medication is administered, it will only last for about three days.
VII. Commonly used glycosides are avermectin, bufalin, and acetylene. The acetylene is known as a product that is not resistant for 30 years and currently kills some of the harmful lice. Spiroxime ester and ethylcarbazole are two effective acaricides. Even if this drug is used for several years, whether it is registration, arbitrage, or implicit component, the effect is gradually reduced.
In fact, the emergence of pest resistance is ultimately caused by irrational drug use. Look for a specific drug. Farmers are struggling to use it repeatedly. Manufacturers overproduce and distributors recommend it. Ultimately, after the resistance is created, it is out of control!
VIII. Whitefly Control Program: The currently used spray insecticides are mostly contact-killing, and a few pesticides have both fumigation and antifeedant effects. Fructus Aurantae attached to the sap of the leaf blade on the back of the leaf, which is easy to form a dead angle that cannot be touched by the pesticide. This is especially true when the plant is flourishing.
Moreover, when the whitefly is disturbed, it will flee and avoid, so that the contact effect of the liquid is significantly reduced. Therefore, once the outbreak of whiteflies, spraying alone is difficult to achieve a good control effect. Because the growth and development of the whitefly is closely related to the temperature, it is necessary to adopt a combination of spraying and spraying or fumigation.
Temperature control method: The vent can be closed to ensure that the temperature in the booth is between 30-33 °C for 1-2 hours (should pay attention to the temperature can not be too high, the time can not be too long, otherwise it is easy to produce phytotoxicity), can effectively improve the efficacy of pesticides, Play a better control effect.
The overall prevention and removal of the treatment method in the earlier period: point application of pesticide insecticide + other crops to attract + spray control First of all, in the pre-planting point application of systemic drugs insecticide. For species that are vulnerable to viruses, pest control begins with seedling colonization. Only from the time of planting can we avoid the proliferation of whiteflies and transmission of the virus.
Nowadays, there are many pharmaceutical agents that can be used in the market, such as the use of biological bacterial agents and tablet pesticides with sustained-release components, which can play a very good role in deworming. There are no insect-repellent products with special acupoints, and some vegetable farmers have chosen Aketai and other pharmaceutical acupuncture points. The colonization has also played a very good effect.
Second, some kind of “food†like powder meal was planted between the rows for centralized control. After the application of acupuncture point, even if there is a whitefly in the shed, they do not like to eat on the colonized vegetables. If there are no points in the shed or on the back wall, the “food†will be seen at the same time. Such as melons, tomatoes, cowpeas, etc., you can better observe the occurrence of whitefly, so that early medication, control the whitefly before the outbreak.
Again, viral diseases and whitefly are suitable for growth under neutral or alkaline conditions. The acidity of the surface of the plant after the sparging of the Kasumi Gold Point or vinegar can inhibit or kill bacteria and insect pests that are not as acidic. After planting, use Jiamei Golden Point, spray once every 5-7 days, even spray 3-4 times, can effectively prevent viral diseases, and increase production by more than 30%. In addition, we must pay attention to the micro-nutrient Jiamei bonus and profitability. Studies have shown that yellowing virus, fern leaf virus and iron, zinc, calcium and other elements are closely related.
Late period: when the sticky board + spraying to the plant is relatively large, the point application of pesticides and other functions is not obvious, the whiteflies can have more space for shelter, and the difficulty of spraying prevention is even greater.
Bemisia tabaci has a strong tropism towards yellow and can be set in the greenhouse to trap and kill adult worms. The yellow board can be purchased directly from the market, or it can be made on its own. Paint the cardboard with a yellow paint, cover it with a transparent plastic bag, and apply a layer of viscous oil (add a little oil with a little oil of No. 10). Apply a stick of oil once every 10 days. Yellow plates can trap adult worms, but a more important role is to provide monitoring of the occurrence of whiteflies. The armyworm board can be hung above the plant, and the bottom of the yellow board is flat or slightly higher at the top of the plant, 40-50 pieces per mu. When it is found that the number of whiteflies increases, it is necessary to spray them in time. When spraying, acetamiprid, matrine, chlorfenapyr, nitenpyram, etc. can be used in combination with buprofezin to rotate the medication and avoid the rapid development of antibiotic resistance.
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