Hello everyone, today is the fifteenth day of the first month, but also our traditional Lantern Festival, here three farmers planting through wish everyone the Lantern Festival is fast, yesterday we talked about the spring mulberry garden management skills, today we talk about the spring peach tree growth period management, peach tree is among other fruit trees, the first flowering fruit tree, especially in the spring, everyone also likes to go out to enjoy peach blossoms, see peach blossoms is also a more pleasant thing, but for the spring, peach tree growth period, Growers need to prevent the harm of the pest Huanglian wood ruler moth, especially in areas where peach trees are planted in mountainous areas, and should strengthen management from pests.
Today we will talk about the harm of this huanglian wood ruler moth, huanglian wood ruler moth believes that many people who plant fruit trees know, especially this pest in addition to liking to invade fruit trees, for other trees are also more favored, in addition to peach trees, like, apple trees, hawthorn trees, pear trees, vine trees, etc., followed by huanglian trees, pepper trees, locust trees, poplars and other trees will cause damage, especially in the mountainous areas planted fruit trees and other trees are more seriously damaged, To say that this pest is not simple is that the yellow wood ruler moth is an omnivorous pest, maybe your planting park will not appear pests today, tomorrow this pest will come to the door, so it is urgent to control the yellow wood ruler moth, everyone should pay attention.
< h1 class= "pgc-h-arrow-right" > first talk about how harmful the Yellow Wood Ruler Moth is</h1>
Huanglian wood ruler moth is a kind of overeating more serious pests, in many areas of our country have distribution, basically in the south and the north will occur this pest, according to records, in 2014 in a mountainous area in Henan region appeared when the yellow wood ruler moth, the larvae of this pest can eat the trees at the top of the mountain in a day, this harm is also relatively large, the harm of the yellow wood ruler moth is so large, the main reason is because the reproductive ability of the huanglian wood ruler moth is relatively large, and the amount of food is more amazing, Secondly, for the occurrence of insect pests in mountainous areas, because the growers are not found in time, coupled with the limited conditions for prevention and control, it is more difficult to say that once the insect infestation occurs in the mountainous areas, in addition, the Huanglian wood ruler moth is different from other pests, it is a relatively lazy pest, do not like to fly during the day, like to rest on fruit trees and other trees, so once the damage to fruit trees is a great loss to growers.
For peach trees in the growth period, once they suffer from the harm of the yellow wood ruler moth, the leaves of the peach tree will be eaten in large quantities, and then the peach tree will grow and be affected, and when the fruit is produced, it will cause serious fruit fall of the peach tree, causing a relatively large loss to the yield of the peach tree, and sometimes the peach is invaded by the yellow wood ruler moth, the fruit tree will stop growing, and the whole peach tree will die.
<h1 class= "pgc-h-arrow-right" > everyone to get to know the appearance of this yellow wood ruler moth</h1>
Huanglian wood ruler moth is a lepidoptera, the pest of the family ulna, the yellow wood ruler moth is also called the wood ruler moth, from the name you can see, the yellow wood ruler moth likes to appear on the yellow wood, for the moth pests we basically have a cognition, that is, most of the moths are the target of the invasion of the fruit tree leaves, and the larvae of the huanglian wood ruler moth in the early stage of action is also very rapid, the resistance of this pest is relatively strong, and the speed of transmission is also fast, mainly after the larvae eat the leaves of the fruit tree in the early stage, Only the leaf vein tissue on the leaves remains, and the larvae will spit silk when they are full, and then the larvae will swing along the spit silk to other fruit trees, and then cause harm to other fruit trees. The following is the appearance of the Yellow Wood Ruler Moth, which is mainly composed of adults, larvae, eggs, and pupae.
Adult: The size of the yellow wood ruler moth is larger than that of the general moth pest, and the female yellow wood ruler moth is larger than the female wood ruler moth, the female adult size is about 20-30 mm, the size of the flying can reach about 70-80 mm, the male wood ruler moth is about 18-25 mm, about 50-60 mm when flying, the compound eyes are relatively large, black, the body is milky yellow, and the wing position is white yellow, The position of the forewing has a relatively large orange-yellow circular spot, the thorax, shoulders, neck, and abdomen have dark brown scales, the outer horizontal lines of the forewing and hindwings are corrugated by orange-yellow and brown, and there is a large gray spot in the middle chamber, and the color of this gray spot will appear protective with the time of the parasitic fruit tree.
Larvae: The length of the newly hatched larvae is about 1.5-2 mm, the body is light brown, the length of the mature larvae is about 70-75 mm or so, the head of the larva is similar to a four-corner diamond, the head is milky white, the head has a light yellow bubble bulge on the top, the position of the forebreast and dorsal plate is protruding on both sides, the head body has a lot of granularity, the chest foot has a pair, the gastropod pair, the tail foot is paired, the middle of the tail is inverted, the tip of the tail is relatively thin, and it is particularly noteworthy that the color of the larva will change with the color of the invading fruit tree, belonging to the color of the larvae, we should pay attention to observation.
Egg: The egg is oval in shape, about 0.8-1 mm long, the body is green, the head position of the egg is black, and there is a layer of orange villi on the body.
Pupae: The length of the pupa is about 25-30 mm, the width is about 6-7 mm, the larvae feather into a pupa, the feathered wing position is green, the abdomen is pink, the pupa will become dark brown after time, there are thorny bumps on both sides of the head, and there are three tail spines at the position of the tail and anus.
<h1 class = "pgc-h-arrow-right" > let's understand the life habits of the yellow wood ruler moth</h1>
Due to the large amount of food collected by this kind of pest, sometimes other trees planted around many fruit tree parks have become the target of infringement, especially in the southwest region of China in recent years, a large number of planting peppercorns is also the main target of the Yellow Wood Ruler Moth, especially the pepper tree and other fruit trees can not spray highly toxic pesticides, so in terms of prevention and control is also under pressure, from the current point of view, many areas to May-June, the frequency of the emergence of the Yellow Wood Ruler Moth has increased, sometimes, When the larvae fall on the grower, it will also cause allergies in the personnel, so it is fundamental to the prevention and treatment that is also reasonable and scientific.
Huanglian wood ruler moth in most parts of China is a generation of annual occurrence, huanglian wood ruler moth pupae in May and June each year began to feather adults, adults will be at the end of June at the end of the tail laying eggs, and then the spawning period in about 10 days, July and August is the peak of the occurrence of insect pests, this time is also the time when young pests concentrate on attacking fruit trees, to August and September is when the larvae become old mature larvae, the old mature larvae at this time will be harmful to November, and then it will be in the orchard fruit tree branch trunk crevices, the soil cracks of the park, Under the rocks, overwinter in the weeds, then appear in April-May of the following year, and then begin to feather. Especially in peach tree planting areas, in the case of rainy spring, temperature and humidity continue to rise, the speed of pupa feathering adults will also appear in advance, under normal circumstances, when the temperature is higher than 10 degrees, pupa feathering adults faster.
After the adult of the yellow wood ruler moth feathers adults, like to lay eggs around the fruit tree and on the fruit tree, sometimes, the adult worm will also lay eggs on the weeds or in the stone crevices, the number of eggs laid each time is also more amazing, the adult eggs can reach 2000-3000 eggs at a time, after laying eggs, the egg grain mulberry will have a layer of yellow fluff wrapped around the egg, because as mentioned earlier, the female wood ruler moth is relatively large, so the amount of eggs laid is relatively large, but the adult worm will die about 10 days after laying eggs. The next round of larvae appears pupating adults.
For newly hatched larvae that like to gather together to harm fruit trees, the larvae of the Yellow Wood Ruler Moth have six age bands, the length of the larvae of the first-instar segment is about 1.5-2 mm, the length of the larvae of the second instar segment is about 8-10 mm, the length of the larvae of the third instar segment is about 20-22 mm, the length of the larvae of the fourth instar segment is about 25-28 mm, the length of the larvae of the fifth instar segment is about 40-45 mm, the length of the larvae of the sixth instar segment is about 65-70 mm, and the larval stage will feather into pupae at about 45 days.
For insect infestation in the peach tree park, generally we can see from the fruit tree whether there is filament, the larvae will spit out silk after nibbling on the leaves, and then the larvae will run to other leaves or fruit trees with the silk, when the larvae are 1-3 years old, the action is relatively fast, will quickly nibble the leaves to run to other places to continue to nibble, but after the 4th instar larvae become more lazy, because the 4th instar larvae at this time have a relatively large amount of food, so the action is relatively slow. Basically catching a tree is a violation. At the same time, adult insects are inactive during the day, only egg laying activities at night, and the larvae also have a strong protective color, so it is necessary to observe carefully in terms of prevention and control.
<h1 class="pgc-h-arrow-right" > how to effectively prevent and treat the yellow wood ruler moth in Peach Tree Park? </h1>
1, timely control of the temperature and humidity of the park, for the early spring, it is best to keep the fruit trees of the park should not be too much watering, too high humidity is the main reason for the occurrence of pests in the park, so for the fruit tree park in the spring and pests appear in April and May to maintain a moderate drought in the park, for the winter planting area when the temperature and humidity are suitable, it is also a reason for the occurrence of the yellow wood ruler moth, mainly the orchard must maintain a certain degree of light and ventilation, so that the orchard is not in a high humidity situation. Secondly, for the law of insect infestation, the yellow wood ruler moth likes to invade middle-aged fruit trees, so it should focus on protecting middle-aged fruit trees during the planting period. At the same time, the planting of other trees is prohibited in areas where peach trees are planted, and fruit trees of large, medium, and young age are planted separately as much as possible.
2, after autumn and early spring, we must carry out deep ploughing soil treatment when the garden is opened and closed, when the soil is deeply ploughed, the tree plate must be planed, the overwintering insect pupa around the fruit tree is killed, and when the fruit tree is deeply ploughed, the stones and weeds around the fruit tree must be cleaned up, and at the same time, the soil crevices should be drugged to kill the insect pupa, and if conditions permit, the irrigation measures can be used to freeze the pupa when winter comes. When the garden opens in the spring, it is also necessary to carry out a deep ploughing, pay attention to the fact that the subsoil of the tree plate should be cleaned, and many insect pupae will be in the topsoil of 2-3 cm under the tree tray, which is easier to dig out.
3, build insect nets, for some orchards around other trees, such as locust trees, willow trees, apples, pears and other fruit trees, it is best to build an insect net before the occurrence of insect infestations, because the size of the yellow wood ruler moth is relatively large, so the use of insect nets is still more rational, but also can use the natural enemies of the yellow wood ruler moth for control, like the black egg bee, small cocoon bee, horse bee, sparrow and other birds are the natural enemies of the yellow wood ruler moth, can control the number and reproduction of the yellow wood ruler moth, in addition, We can also use the phototropism of the adult insect of the yellow wood ruler moth, and can use black light lamps, high-pressure mercury lamps, solar insecticidal lamps, etc., which can play a role in insecticide. Secondly, for the Yellow Wood Ruler Moth in the morning when there is dew, due to the wings of moisture can not fly, this time we can manually use the insect net for artificial pest control.
4, the reasonable use of drugs for insecticide, but for fruit trees in the growth period, we still have to adhere to the use of low-toxicity pesticides, for our spray control of pests the principle is, strictly crack down on the first three-year-old larvae, increase the dose of larvae after the fourth instar, the recommended drugs can use dichlorvos emulsion, oxidation of fruit, dimethoatecrystal crystals, high-efficiency cypermethrin, cyanopyridine emulsion, fipronil. Secondly, biological agents can also be used for pest control, and it is recommended to use Bt emulsion or matrine for control.
Special attention: when spraying fruit trees with drugs, to spray from the canopy, be sure to spray the leaves of fruit trees to start dripping water, in addition, in some remote mountainous areas when planting fruit trees suffer from insect infestation, unfavorable conditions, you can also use an efficient cypermethrin smoke machine for spraying treatment also has a good effect.