In fact, the red spider can breed more than ten generations a year, and the time of egg formation at different time periods is different. The time of hibernation is generally in the late period of 10. But now, even if the temperature drops, Starscream still exists, but not as much as in the summer peak. Especially now, the temperature in the south is not lower than that in our northern region. As long as the temperature is high, dry air is still their favorite living condition, so there is no need to release pressure in management.
Chlorfenapyr 1500 times solution and phenylhydrazine 3500 times solution should be sprayed continuously. If found, stop spraying as soon as possible. There may also be people who love flowers who consider using floods instead of sprayers. If it is summer, it is allowed, but in autumn, the light intensity should not be too high. When the natural ventilation standard reaches the limit, Bian Xiao does not recommend using floods. For this reason, when we discuss this disease, Bian Xiao will express it independently. Painting is highly recommended here. When these kinds are not available, roxithromycin 1500 times solution can be used alone. Don't forget not to mix with other fertilizers. In addition, 1500 times esoacridine aqueous solution is a good choice. Until the end of 10, enough sprayers can be applied on the surface of branches and tin soil to kill eggs. In that case, the nymph will not ovulate in the spring and March of the following year.
2, whiteflies In addition to the red spider, Rose is also troubled by whiteflies. In the past half month, Bian Xiao has been plagued by whitefly, yellow board, imidacloprid and acetamiprid. They are all used, although they are reduced, but they are still more. There are no potted plants in the greenhouse on the roof, only mint. I have been watering, and suddenly a group of flowers ran out. This pest has been a headache in crop cultivation for many years, and the drug resistance of Bemisia tabaci is different in different parts of the country because of the large amount of drugs sprayed. In addition, 10 generation bred in a year is difficult to fade completely and can survive under high and low temperature test conditions, so both north and south should pay attention to this season. The temperature must be around 23 degrees to really release pressure prevention. Otherwise, the leaves of Chinese rose will gradually change color and turn yellow because of its smoke, spreading diseases.
As far as buying medicine is concerned, acetamiprid and acetamiprid mentioned by Bian Xiao are OK, but only when Bemisia tabaci is few. In addition, it should be used with yellowed boards. In more serious cases, like Mr. Bian Xiao, they have developed resistance to these drugs, so they have to change them to 30% thioxime and bifenthrin 10%. When in use, each medicine is taken at 1g( 1mL) and discharged at1.5l.. If Bemisia tabaci is Bemisia tabaci, Bian Xiao forgot to take a picture. With the picture that Penny took two days ago. According to a better understanding, this cockroach is enough.
3, thrips, thrips, are still very active now. Almost 10 pots of roses in Bian Xiao's house have been recruited, and the leaves are distorted and the buds are deformed. Many new rice lovers remember that the problem like leaves is the result of being bitten by thrips. If the situation is light, the leaves are only slightly twisted at the top. At the serious moment, all the leaves are twisted like lard residue, and the flower bones are black and unable to bloom. At the same time, the total number of blind buds and hair branches increased, and the leaves of roses gradually narrowed.
The traditional Chinese medicine preparation of Bemisia tabaci introduced above has a good effect on thrips, and the compound effect of acetamiprid and acetamiprid is better, which prevents the drug resistance of one or two commonly used pesticides. It should be noted that these pests are applied in broad daylight, but thrips must be applied after dark. After all, it is a nocturnal pest. In addition to applying medicine, it is best to trim the bitten leaves and spray medicine after pruning. Naturally, if there are only a few leaves left in a broken rose, don't cut off all the leaves under the most basic main stem. After pruning, the yellow leaves are not very serious and can absorb light to produce nutrients. If new healthy leaves grow, it is safe to cut off these old leaves for maintenance.