Precautions for spraying pesticides on Chinese roses
An article about the precautions for spraying pesticides on Chinese roses. Let's take a look at the specific content with the editor!
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Recently, as the weather has become hotter and hotter, many diseases and insect pests of Chinese roses have started to outbreak, such as red spider mites, thrips, black spot disease, and so on.
In the face of these diseases and insect pests of Chinese roses, we still need to spray pesticides in time for treatment and prevention. What I want to say today is a little precaution about spraying pesticides.
The above is a question asked by a reader group of flower enthusiasts. As can be seen from the picture, many tender buds have started to turn black.
There are also spots of withered leaves on the leaves, and the leaf tips have turned yellow. These symptoms all appeared after spraying, indicating that the concentration of the medicine is too high.
So how to avoid the occurrence of phytotoxicity when spraying pesticides?
First of all, pay attention to the concentration of the medicine.
Controlling the concentration is the key to avoid phytotoxicity. Generally, there are instructions for the proportioning concentration on the packaging of the medicine, but most of them are calculated in mu.
Because pesticides were previously used for large-scale crop production, and the calculation unit is also based on mu, this calculation method is too large for our family flowers.
If you have good arithmetic skills, you can certainly convert and calculate, but if you are like the Green Plant Enthusiast Network and not good at math, you can only estimate for yourself.
How to mix if you don't know how to calculate the concentration?
If you don't know how to calculate the concentration, like the Green Plant Enthusiast Network, the safe approach is to try it first. Generally, the concentration of fertilization is above 2000 times, and the medicine preparation can also refer to this concentration.
First mix a concentration of about 2000 times and spray it on a single plant, then observe the effect. If it is reduced, you can continue to spray the medicine at this concentration after a few days. If there is no sign of improvement, you need to increase the concentration and try again.
Precautions when spraying pesticides: First, pay attention to personal safety protection when spraying pesticides, it is best to wear gloves, masks, long-sleeved shirts, and long pants, and when spraying pesticides outdoors, be sure to stand upwind. It is not suitable to spray pesticides on windy days.
You should not only pay attention to personal safety protection, but also control the amount of pesticide spray and try to spray evenly. Both the front and back of the leaves should be sprayed.
The speed of movement when spraying should be as uniform as possible to avoid staying too long in the same position, which can easily lead to excessive drug residue and fertilizer damage.
Usually, when the concentration is properly mixed, spray until the leaves are dripping.