"Open guns are easy to hide, dark arrows are difficult to prevent", crops appear diseases and insect pests, to the agricultural material store to buy pesticides, as long as the right medicine, sprayed twice at most, can solve the problem, however, there is a kind of insect that drills into the tree body, no matter how you spray pesticides, it just does not come out, hiding in the tree body to nibble on the wood, "taste" the sap, a look that can not help it, so that farmers hate the gums are itchy, but can only look at the tree and sigh, for a time really can not come up with too good a way to deal with it.
This pest has two significant characteristics, one is the appearance of debris at the eye of the tree body, or brown or white, and the other is the flow of sap at the harmful part, or the flow of glue, according to the different trees, the two symptoms and symptoms are not the same.
So, what is this pest, and how can farmers and friends effectively prevent it?
According to agricultural expert and agronomist Zhang Yanhuai, this kind of insect pest is often the "masterpiece" of the two pests of Pear Jinyuan Jiding and Baixing Tianniu, and it is not difficult to control it, it is difficult for farmers and friends to grasp their living habits, and it is not surprising that they cannot do the prevention work of early application of medicine in the early stage, and cannot master the tricks of scientific prevention and control during the harmful period.
As the saying goes, "Only by knowing oneself and knowing the other can we never lose a battle", if you want to completely prevent these two pests, you must find out their living habits and their respective weaknesses.
Pear golden edge of the jiding, is the familiar gidding insect, can harm peach, pear, apple, sand fruit, apricot, hawthorn and other fruit trees, according to the region, 1-3 years can occur a generation, with larvae to harm the tree body (that is, what everyone calls drill heartworm, or borer tree worm), according to the region, late March or early April began to pupate, early May can be seen adult insects.
At this time, the first key point of control of giddingia comes, as long as the adult of giddingia is seen, before it lays eggs, dilute 1500-2000 times the spray with 20% perchloromalatiphos to carry out adult control, while also preventing heartworms, once a month, according to the size of the insect, it needs to be controlled 2-3 times.
The second key point in the prevention and control of giddingia is passive administration, that is, after seeing the symptoms of giddingia harm, start to administer drugs, and there are many types of drugs, such as fast-acting and effective cypermethrin + thiamethoxam or cypermethrin + chlorpyrifosyl formula, diluted with water 10 times after flexible application.
Less harmful: If the tree body has only one worm hole, the drug can be injected into the worm hole with a syringe and then blocked with batter or mud.
More serious harm: you can scrape off the bark of the harmful parts of the continuous pieces, wrap them with pesticide soaked cotton cloth or sack pieces, and also seal the harmful parts with medicinal mud.
In addition to passive administration, active prevention is the key point, in addition to active application of medicine to prevent adult insects, for gidding insects love weak trees, that is, rural people often say "rotten eyes are willing to attract ash", so scientific planting, so that fruit trees have a robust tree posture, is the core measure to resist Gidding insects.
White Star Tianniu, one of the many varieties of Tianniu, and pear golden edge giding, are all coleoptera pests, and the biggest difference between pear golden edge giding is that the way of harming trees is different, white star tianniu not only endangers fruit trees, but also endangers non-fruit trees such as willow, while pear golden edge giding prefers fruit trees.
The White Star Celestial Bull generally harms the lower part of the tree, while the Pear Golden Edge Jiding likes to harm the upper part, of course, this is not very absolute, but their habits are indeed so.
In terms of spawning, the White Star Celestial Bull seems to be able to produce a little more than Pear Golden Edge Giding (70:30 eggs) and has a greater risk of harm.
In comparison, the larvae of the White Star Celestial Bull are more harmful, the woody parts of the borer are deeper, and it is more difficult to control.
The peak feathering period of the white star tianniu is 5-6 months, and the spawning period is 5-8 months, that is to say, during this period, it is the best period for the control of adult tianniu, and once the adults are eliminated, they can prevent their eggs from laying, thereby reducing the amount of harm of larvae.
The specific application method for the control of adult white star cattle is the same as that of pear gold edge jiding.
For regular orchards, you can start from the management procedures such as clearing the garden and painting white in the early stage, and the scattered trees are damaged, and the way of seeing the wormhole can be blocked.
Before and after the insect infestation, the formula of thiamethoxine + high-efficiency cypermethrin is diluted with water for 10 times, and the syringe is used to inject the drug, and the worm hole is blocked after application, which can achieve a more ideal killing effect.
In the middle and late stages of insect pests, the larvae are aging, the woody parts are deeper, and the insect path is gradually complicated, considering that pesticides cannot contact pests, the epidermis of the worm holes can be enlarged, the worm holes are blocked with aluminum phosphide particles, blocked with mud, and in the way of fumigation, the old pests with deeper borers can be easily eliminated.
Warm tips: The traditional control of drill borer pests often uses more insecticides such as dichlorvos, but there are more and more farmer feedback that the excessive use of chriopyrene can easily cause the death of branches or trees, so under the premise of ideal drug substitution, try not to use dichlorvos.