Key words: red spider in apple orchard comes from prevention and control. In my hometown in Pingliang, Gansu Province, red spiders are not only found in apple orchards, but also on apricot trees, peach trees, plum trees and pepper trees, so the occurrence range is still very wide, so it is also a headache for our local area.
This red spider in the apple orchard has strong wintering ability, and better preventive measures can be taken before winter and before apple trees germinate in early spring.
Therefore, I suggest you start with the following points:
1. First, the work of clearing the garden. First, it is in winter after autumn, and second, it is before the apple trees bloom in early spring. The garden cleaning work is mainly to thoroughly clean up fallen leaves, orchard garbage, weeds, hay and so on in the apple orchard. This way of cleaning the garden has a lasting effect, so I suggest you do it better.
2. Trim and scrape the bark. In my hometown in Pingliang, Gansu, I mainly prune in the twelfth lunar month and the end of the month. At this time, you will find that there will be more dry and rotten branches on this apple tree, some of which need to be sawed off directly, and some need to scrape off the rotten bark.
Then a large number of spider eggs and larvae will be in these bark interlayers, so we have to scrape them off completely, and then clean up these barks out of the orchard and even burn them centrally. Then my family usually smears it with special chemicals. If it is made before wintering, it can be directly smeared with lime mixed water. One is to prevent freezing, and the other is to prevent pests and diseases, killing two birds with one stone.
3. Weeding, this measure is similar to "clearing the garden". In my rural hometown of Pingliang, Gansu, this kind of weeding and clearing the garden for apple trees can be done almost all year round.
What needs to be done is to get rid of weeds in the apple orchard in early spring, early summer, midsummer, autumn and after autumn before winter. If black plastic film is laid on my house, weeds will be reduced by a large part, so the prevention and control of red spiders (mainly damage to the breeding environment) combined with effective weeding will prevent red spiders to a great extent.
4. According to the medication of Starscream, it is mainly concentrated in two stages, one is before the apple tree blooms and germinates, and the other is before bagging, which is the time period with the largest occurrence, so the acaricide will be directly sprayed on the apple tree.
In these two stages, my family usually sprays some chemicals on red spider, aphid and leaf curl moth larvae for two or three times, and the control effect is quite good. The main control is some red spider larvae and upcoming adults, who are extremely active in apple trees.
Of course, during the whole apple tree growth period, it is still necessary to observe carefully, because the onset of this red spider begins in the middle and late February of the lunar calendar and can last until the beginning of the lunar calendar 10, which is still a long time for our rural areas in Pingliang, Gansu. Therefore, after the prevention and control from spring to early summer, we should not take it lightly in the expansion period and coloring period of apple fruit, especially after continuous rainfall, we should observe and prevent it in time.
Summary Therefore, the red spider in this apple orchard mainly breeds in soil, bark and dead leaves, so we need to do a good job of prevention first, from pruning, scraping bark (cleaning and burning), clearing the garden (leaves and weeds), ensuring the cleanliness in and around the apple orchard, so that the breeding environment of red spider can be destroyed, and combined with pesticides and mites in the apple growing period, the effect will be very good.