Yesterday I chatted with a fruit grower friend and talked about the problem of apple tree pest control now, and this fruit grower friend said that in his orchard, sometimes he can see the pest infestation, but he can't find where the pest is.
Drought and insect prevention, the spring in Jiaodong area is often relatively dry, the same is true this year, in recent times, I have a lot of orchards in our Jiaodong area pest occurrence is more serious, in view of the situation of yesterday's fruit farmer friend, I went to some orchards today to check it, took some photos, and also combined with my records in the orchard some time ago, to talk about the pest problem on apple trees in our Jiaodong area in the recent period, mainly so that our fruit farmer friends can find these pests, And in the next step of management can be targeted measures.
<h1 class="pgc-h-arrow-right" > green blind bugs</h1>
A few days ago I wrote an article about green blind bugs, this year in our Jiaodong area, to focus on the prevention and control of this pest, there are many orchards have appeared more harmful situations, so it is necessary to talk about it again.
Green blind bugs are pests of sucking mouthparts that can harm the young leaves and young fruits of apples, and now they mainly harm the young leaves of apples. After the young leaves of apples are harmed by green blind bugs, some dark necrosis spots appear, which has been very obvious in recent days.
Let's look at the picture below, this is the situation where the green blind bugs I photographed in the orchard today harm the young leaves of the apple, on these young leaves, we can see some dark brown spots, which are the necrotic spots formed after being sucked by the green blind bugs, as long as the apple leaves are found in the orchard, there must be green blind bugs.
Green blind bugs harm the performance of young leaves of apple trees
On such young leaves, we can find the larvae of the green blind bugs on a closer look, and if the temperature is very high, the green blind bugs are likely to hide in these leaves, and in the morning or evening when the temperature is relatively low, we can find the green blind bugs from the surface. The green blind bug is green and very small, now about the size of an aphid, but it is very lively and runs fast, and the picture below is what my enlarged green blind bug looks like.
Green blind bug control to grasp the use of drugs after flowering, you can choose pallidoid insecticides, flufenacilamine nitrile, acetamiprid, thiamethoxine and other agents, found the orchard of green blind bugs, when using medicine after the flower, you must put all the weeds around the orchard ground after the medicine, because when spraying, green blind bugs are easy to hide in these weeds, and it is difficult to have a good effect without taking medicine.
The green blind bugs found on these young apple leaves in the picture above
< h1 class = "pgc-h-arrow-right" > leaf curling moth</h1>
Now is the peak of the leaf curl moth harm, many orchards have appeared a lot of leaf curl moth, we here the most is the top of the leaf curl moth, we look at the picture below, this is also what I photographed in the orchard today, if we find such apple shoots in the orchard is rolled together, basically it is now more harmful top leaf curl moth.
The top-tip leaf curl moth harms the young leaves of apple trees and rolls them together
If we open these young leaves that are rolled up by them, we can find that their bodies are pale yellow and their heads are black larvae, and these larvae can be cocooned in them by mid-to-late May, feathered and laid eggs around mid-June, and the first generation of larvae occurs around late June. Now when we spray medicine, they hide in the rolled young leaves, which can play a certain protective role, so I personally believe that if the top leaf curling moth in the orchard is more serious, we should pay attention to taking certain measures to prevent and control it in mid-to-late June.
Now we can see such curly leaves directly and artificially eliminate them when we thin the fruit in the orchard, and when we spray after flowering, we can choose to control and control agents such as methylphenidate, urea, fluolamide or permethrin insecticide.
Peeling open these young leaves that are rolled together, you can see the larvae of the top leaf curling moth
In addition to the top leaf curl moth, in some of our orchards, we have also found traces of apple leaf curl moths, but the number is far less than the number of top leaf curl moths, only occasionally found, this pest is also curly leaves, now mainly endanger the leaves of apple trees, feathering around mid-June, late June to early July when the first generation of larvae hatched, at that time if it is an apple without bagging, the fruit will also be endangered. The first key period of control of the apple leaf curl moth is after flowering, and the choice of medicine is the same as that of the top leaf curl moth.
Apple leaf curl moths are also occasionally found in some of our orchards here
<h1 class="pgc-h-arrow-right" > red spider</h1>
Apple blossom before the flower is the focus of red spider control period, I found some hawthorn leaf mites in some of our orchards, hawthorn leaf mites are a kind of red spider we often say, after the apple blossom, is their peak spawning period, the following picture is what I photographed today, we can see that they gather on the back of the apple leaf, has begun to spawn in large quantities.
Red spiders and their eggs on the back of apple leaves
However, their size is very small, and now the harm to apple leaves is not very obvious, we fruit grower friends can be sparse flowers and fruits, incidentally check the back of apple leaves, if you find some very small red dots, basically it is a red spider. What I found today is hawthorn leaf mites, which are now at the peak of spawning, about a week after the fall of the flower, and the spawning ends, so the first and second times after the apple blossom are the key periods of control.
In addition, before and after the wheat harvest, it is also a critical period for the prevention and control of hawthorn leaf mites, in our Jiaodong here is around the beginning of June, this time is exactly at the end of the apple bagging, so if the orchard found hawthorn leaf mites, it is recommended not to directly hit Bordeaux liquid after bagging, first hit a clear water medicine, plus acaricide, after the prevention and control of hawthorn leaf mites, and then hit Bordeaux liquid to protect the leaves.
The red spider is very small, just a small red dot on the apple leaf, even if magnified more than ten times, it is very difficult to see their appearance
<h1 class="pgc-h-arrow-right" > scarab beetle</h1>
Since the end of April this year, there have been some scarab beetles in our apple trees here, and by the way, it is common during the day to be the Apple-Haired Golden Turtle, which is mainly active during the day, and when the temperature is relatively low at night, the tree will be hidden in the soil at night, and when the temperature is above 20 ° C at night, it will stay on the fruit tree.
Apples and mary turtles like apple flowers the most, so they are mainly harmful to the flowering period of apples, as long as they have passed the flowering period, they will basically not harm the apple trees anymore. They have a suspended animation, after being frightened will fall on the ground to pretend to die, this has been found in many orchards here, for apple trees that have not yet fallen flowers, we should pay more attention to it, and we can eliminate them in time.
Apple-haired golden turtles are harming apple blossoms, and after the flowers are gone, they are basically no longer harmful
Then there is the apple's black velvet gill golden turtle, we have here "black coat" and other names, this in many newly planted or one or two years of young trees in the orchard appear more, and apple mauri golden turtle contrary, they come out in the evening, during the day will hide in the soil around the fruit tree, they mainly endanger the young leaves of the apple tree, according to my observation, they eat apple leaf leaves very fast, after four o'clock in the afternoon, some small young trees often appear a lot of black velvet gill golden turtle, the harm to the apple tree is more serious.
At present, most of the fruit farmers take the method of artificial control, that is, in the evening to go to the orchard, the fruit tree to a few times, the black velvet gill turtle on the tree will fall to the ground, and then use plastic sheet to catch or directly eliminate the way to remove, if the occurrence is more serious, you can in the evening, the canopy sprayed with the appropriate amount of insecticides such as parathrin to eliminate.
The black-velvet gill turtle only appears in the evening and nibbles on the leaves very quickly
<h1 class="pgc-h-arrow-right" > summary</h1>
At present, it is the critical period of various pest control, for the control of these pests, we must first find out which kind of pest is harming, there are many pests due to small size, hidden deep and other characteristics, it is difficult for us fruit farmer friends to find out if they do not pay attention, so today we will talk to fruit farmer friends about some of the pests I found in our orchard, fruit farmer friends can refer to the control, carefully observe in their own orchards, in order to facilitate targeted prevention and control measures after flowering.