Traditional Culture Encyclopedia - Photography major - What is the white spot on the flower? Is it a bug or a disease
What is the white spot on the flower? Is it a bug or a disease
Red spider is a kind of mite, also known as Tetranychus urticae, commonly known as red spider, fire dragon and short-bearded mite. This is a common flower disease, especially harmful to flowers and leaves. It is widely distributed and hosts are very common, including herbs, woody plants, fruit trees and wild elms, broom and pine needles in bonsai. Starscream's body is very small, only the size of a needle tip, less than 1 mm, round or oval, orange, reddish brown and so on. It's just a red dot to the naked eye, and you can see orange-red transparent spherical eggs under the magnifying glass.
In family flower cultivation, the following methods can be used to control red spider:
(1) Soak the orange peel in water for about 10 times, soak it for one day and night, filter it, and spray the plants, which can also prevent aphids, such as watering flowers and preventing nematodes in the soil.
(2) Mix 15g washing powder, 15ml 20% sodium hydroxide and 7.5kg water evenly, and then spray. After 1-2 days' inspection, the mortality rate of adults and nymphs of red spider was 94% ~ 98%.
(3) Take 50g of plant ash, add 2,500g of water, fully stir, soak for two days and nights, filter, add 3g of washing powder, mix well, and then spray/kloc-0 times a day, at intervals of 1 week for 3 days, which can not only kill the second generation pests, but also control sucking pests such as aphids and scale insects. Put it in the soil to prevent maggots.
(4) light a plate of mosquito-repellent incense, put it in the diseased plant basin, and then tie it tightly with a plastic bag. After about 1 hour, both eggs and adults can be killed.
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