The small accident rose turned into a big flower face.

This is the 882nd day of the Blue Devil's daily original article.

Rose Culture Series: the 80th

Recently, the weather is getting hotter and hotter, and many rose diseases and insect pests have begun to break out, such as red spider, flower thrips, black spot and so on.

In the face of these rose diseases and insect pests, we still have to spray drugs in time for treatment and prevention. What the blue demon wants to say today is that there are some points for attention in medication.

Above is a question asked by the blue demon reader group of flower friends. As can be seen from the picture, many buds are beginning to turn black.

Scorched spots also appeared on the leaves, and the tip of the leaves turned yellow. These symptoms all appear after the medication, it can be seen that it is due to the high concentration of the drug. So what should be done when administering drugs in order to avoid drug damage? First of all, we should pay attention to the concentration of the drug. Controlling the concentration is the key to avoid drug damage. In general, there is a description of the ratio concentration on the packaging of drugs, but most of them are calculated in mu.

Because pesticides used to be used in large areas of crops, the unit of calculation is also calculated in mu, for our family flowers, this calculation method is too huge. If you have good arithmetic skills, of course you can do conversion calculations, but if you are like the blue demon, you are not good at math, then you can only weigh it yourself.

Will not calculate the concentration, what if the ratio? If you can't calculate the concentration like the blue demon, the insurance policy is to try it out first. Generally speaking, the concentration of fertilization is more than 2000 times, and we can also refer to this concentration for dispensing.

First spray a single plant with a concentration of about 2000 times, and then observe the effect. You can continue to spray this concentration every few days. If there is no sign of improvement, you need to increase the concentration and try again.

Precautions when spraying: first of all, pay attention to personal safety protection when spraying drugs, it is best to wear gloves, masks, long-sleeved clothes and trousers, outdoor pesticide spraying should stand in the upwind to spray. It is not suitable to take medicine in a windy day. We should not only pay attention to personal safety protection, but also control the amount of spraying, so as to spray evenly as far as possible. The front and back of the leaves should be sprayed.

When spraying, the speed of movement should be as uniform as possible to avoid staying in the same position for too long, which can easily lead to too much drug residue and fertilizer damage. Usually when the concentration ratio is moderate, the leaves can be sprayed salivating.

Blue demon recommends spraying not only the rose plants, but also the surface of the basin soil, in order to kill bacteria and pests that remain on the surface of the basin soil.

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