The dry infusion technique is a new type of plant protection technology that has emerged in recent years. Compared with the traditional spraying method, toxic soil method, fumigation, smearing, irrigation and earthing methods, the injection and infusion solution has high utilization rate and pollution. Small, and can go deep inside the plant to solve some "difficult miscellaneous diseases", so once introduced, quickly popular. There is nothing wrong with trying new plant protection methods, but not every kind of tree, every kind of medicine is suitable for the sling bottle insertion. Plant protection experts have repeatedly reminded that if you do not prescribe the right medicine, that is, misuse or abuse, the result can only be "self-seeking trouble." So, how to correctly and properly use the hanging bag? What other plants can not use this method? The reporter interviewed relevant plant protection experts. Clear application scope The original purpose of the dry injection method is to prevent and treat plant pests and vascular pests, as well as to supplement tree nutrients, regulate plant growth activities, and treat plant deficiencies. In this method, the insecticide diluent or certain nutrient components having systemic action is injected into the trunk to make it evenly reach the various parts in the tree body along with the transpiration liquid flow, so that pest control or nutrition purposes can be achieved. The commonly used infusion methods include hanging bottle (bag) infusion, self-flow trunk injection and nebulizer pressure. Gao Jianqiaoguo, Senior Engineer of the Landscaping Management Department of Shijiazhuang City, told the reporter that the injection of dry infusion can be carried out from the beginning of spring sap flow to the fall of the tree before sleep. Among them, the bottle infusion is suitable for seedlings with a trunk diameter of more than 5 cm. If the trunk is too fine, the input liquid cannot flow into the xylem well, and it will also cause some damage to the trunk. Self-flowing tree trunk injection is suitable for tall trees with a trunk diameter of more than 10 cm. It mainly utilizes the dual effects of atmospheric pressure difference and transpiration, so that the liquid enters the tree body slowly through an automatic infusion device inserted obliquely on the trunk. Sprayer pressure transmission is to seal the sprayer with liquid, the nozzle head is fitted with a conical hollow plug, and it is tightly inserted in the infusion hole, pull the handle to inflate and pressurize, open the switch to infusion, when the handle is inflated and laborious to stop Infusion, and seal the orifice. At present, the use of high-pressure trunk injection technology to prevent poplar and other issues has been gradually carried out in Beijing and other cities. Experts warn that some medicines are not suitable for dripping; some do not have to use dripping needles; sometimes nutrients transferred may not be needed by trees. If you infuse a tree that is not suitable for hanging a bottle into a bottle, you will only “seek troubleâ€. For example, the following trees are not suitable for hanging bottles into the bottle: peach, peach, torch tree, pine, cherry, cherry, citrus, apricot, plum, lemon and so on. Such trees often develop wounds due to bacterial invasion, insect infestation, mechanical damage, frost damage, and sunburn, and the phenomenon of tree trunk flow or liquid fat appears. Another example is cedars. Once a wound occurs, the rosin overflows and the infusion port of the sling is blocked. To master the essentials of operation, when injecting fluids, it is imperative to master several operating points and precautions. Zhang Weixing, director of the Plant Protection Technology Research Institute of Pingan, Zhengzhou, said, first of all, the position of infusion is slightly lower, and 30 cm from the ground is appropriate. . When the hole is punched, it is at a 45-degree angle with the trunk, and it is drilled 5 to 10 cm diagonally. The hand drill can be used. The drill bit's fineness is about 3 mm. Try to clean the chips inside. Second, master the infusion time. It is best to take medicine in the weakest part of the plant life. In addition, consider the safe period of application of edible plants. Again, pay attention to the amount of assault or reinforcement of the drug so that the effective insecticidal effective concentration is achieved in the plant immediately after the drug is administered. In special circumstances, it is necessary to input some drugs one after another, which is called consolidation or maintenance. The purpose is to maintain the insecticidal effective concentration of the drugs in the plants so that they can control the pests in a longer period of time. The concentration of drug solution is usually determined according to the nature of the pest. Under normal circumstances, the effective concentration of insecticidal infusion is between 0.015% and 0.05%. If the concentration is too low, it will not play a role in killing insects and it will even cultivate pest resistance. If the concentration is too large, if excessive accumulation occurs in the tree, It will burn plant leaves. Technology is still to be perfected Plant protection experts have stated that infusion plant protection is currently only a perfect means for traditional plant protection. Pests that can be effectively controlled by spraying methods do not advocate infusion plant protection. Because the effective concentration of infusion, the reasonable number of infusions, the rational choice of pharmaceuticals, and the compatibility of input fluids, etc., are still immature and cannot be popularized within a certain period of time. Experts emphasized that when plant phloem diseases are being controlled, the infusion plant protection has a greater limitation. For example, the rotten tree disease of willow tree. At present, more bacteriostatic agents can be transmitted from the bottom to the upper part of the phloem, but such bactericides have poor mobility in woody plants and can only be used for the prevention and control of cereals and diseases of herbaceous plants. The agents that can conduct from top to bottom are very limited, and only a few, such as pyraclocin, are more toxic. Few bactericides that can achieve bidirectional conduction in plant phloem are rare. Therefore, the selection of the drug also makes the injection of infusions somewhat impeded. Zhang Weixing finally said that the advantage of bottle insertion into the bottle is remarkable, and it can effectively improve efficiency in terms of rejuvenation of old trees, weak trees, and prevention and control of long-lived insects such as Tianni. However, there are still few experts in this field to develop methods that can be widely used, recommended pharmaceuticals, and scientific usage. As a manufacturer, it is impossible to exaggerate the facts of the promotion of the bottle insertion product in the absence of sufficient scientific basis and practical experience. This quick success and quick approach can only accelerate the end of the market life of such products.
