1. Reasonable drug selection: Select high-efficiency, low-toxic, low-residue pollution-free pesticides ; second, choose biological agents, such as microbial pesticides, antibiotics, etc.; third, try to use selective and selective pesticides, Use broad-spectrum pesticides to protect natural enemies and beneficial organisms; Fourth, use pesticides or imported pesticides produced by domestic pesticide manufacturers, and try not to use "new drugs." Most of the so-called new drugs are refurbishment of old drugs. Although the name is good and the packaging is good, the price is more expensive and the use is not affordable. Fifth, we must choose a drug with a good active ingredient content.
2, timely use of drugs, according to the characteristics of the occurrence of pests and diseases, such as gold-grained moth, heartworm and other drill-bit pests to be in the adult stage, egg stage and larvae hatching before the leaves have been drilled, fruit; the scale insects should be secreted The wax layer is administered prior to forming the shell. The second is to use the drug according to the performance of the drug. For example, the late-acting pesticides such as chlorfenapyr and BT should be applied for 3-5 days in advance to maximize the effect of the drug; the protective fungicide should be applied before the infection of the bacteria, and the systemic fungicide should be applied at the beginning of the disease. medicine.
3. Accurate use of drugs should be strictly in accordance with the dosage and concentration of pesticides used on the pesticide label. Second, the correct application method should be selected, such as fumigation or injection to control dried pests such as beetles and geyser; The quality of the drug. Maintain a balanced pressure when spraying the liquid. The spray head is more than 0.5 m away from the fruit tree leaves to ensure the atomization effect. The spray should be even and thoughtful. From top to bottom, from the inside to the outside, the front and back sides of the blade should be sprayed with the liquid medicine. It should not be leaked or sprayed. It is better to wet the leaves and not form flowing water droplets.
4. Safe medication mainly includes safety for humans, animals, fruit trees, fruits and natural enemies. For the young fruit period before bagging, use pesticides such as dry suspension, water-dispersible granules, water-floating agent, microemulsion or wettable powder for safe young fruit. Do not use organic phosphorus or pyrethroids. Insecticides and fungicides containing sulfur, thiram and copper, so as not to cause fruit rust and kill natural enemies.
In addition to mastering the above principles, reminding fruit farmers should also pay attention to three points:
First, when using fungicides, care should be taken to use protective fungicides and systemic fungicides alternately or in combination, especially for the last time before bagging, it is necessary to add high-quality systemic fungicides. After the medicine is used, the medicine solution is dried and then bagged. Generally, the bagging starts within 2 days after spraying, and the bagging ends within one week.
The second is to pay attention to the selection of high-quality, breathable fruit bags to ensure the effect of bagging and control the occurrence of pests and diseases in the bag.
The third is to pay attention to the prevention and control of pests and diseases before apple bagging, to prevent fruit from carrying insects into the bag, and to pay attention to the prevention and control of pests and diseases in the leaves and branches of the bagging, to protect the growth of fruit trees, and to bring you a bumper harvest. joy.
Stop Valves are closed by screwing a rubber gasket down onto a seat in the middle of the valve. Pros only use small versions that act as shutoff valves for fixtures such as sinks and toilets and outdoor sillcocks. Flow is inefficient because of the circuitous route the fluid (water, in most cases) has to follow. It's important to orient the valve in the right direction with the arrow (cast into the side of the valve) aligned with flow direction. That way, water flows against the bottom of the rubber gasket. If the valve is put in backward, the flow will force the gasket away from the top of the valve.
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