As the saying goes, the spring cold is steep, and the first warm is still cold. Spring weather warmer is accompanied by occasional rain and cooling, how should we prevent the threat of pests and diseases at this time? Let's take a look.~
Pest
The warm weather in spring and the right temperature not only allow the moon to begin to sprout and nurture buds, but also make pests come out to move.
-Aphids-
Description of the disease: After the warm weather, many flower lovers found that their moon season was covered with many dense small bugs.
Where there are these insects, such as young shoots, flower buds or leaves, they will show a state of deformation and distortion until they wither, which is the scourge of aphids!
Aphids, also known as honey worms or greasy worms, have mosquito-like stinging mouthpieces through which they suck up the juice of the moon.
Leaves or buds that lose sap will twist and wither due to malnutrition, not only unable to grow or flower normally, but also caused by bacterial infections and other diseases.
What happens: How exactly did the aphids appear?
They usually spend the winter in the grass or deciduous bushes, and when the weather is warm, they will come out to look for young leaves and other young leaves as their own rations.
Temperatures of around 20 °C are most suitable for the growth of aphids, and dry and rainy weather will encourage their reproduction. Therefore, the months of May and June of each year are most susceptible to aphid infestations.
Control means: Timely cleaning up dead branches and leaves in the growth area of plants can effectively avoid the emergence of aphids.
If you already have aphids in the season, then in the early days, you can directly cut them off and then rinse them with water to avoid the remaining aphids and their secreted honeydew residue.
In addition, you can also hang a yellow plate to adhere to aphids, and if you want to kill aphids more thoroughly, imidacloprid sprayed with water in proportion to the packaging requirements is also the best choice.
-Red Spider-
Symptom description: The leaves appear densely white spots in the moon, the leaves are dry yellow and then withered, and some also have many spider webs, seeing such a situation, there is no need to doubt that your moon season is born with a red spider!
Causes: The appearance of red spiders is usually related to the high temperature and dry weather in spring, if the maintenance environment is lacking ventilation, it will come to the door properly, especially in April and May in the spring, which is the outbreak period of red spiders.
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Prevention and control methods: how to avoid the appearance of red spiders in the monthly season?
We often talk about the use of stone sulfur compounds to clear the garden in winter, which is a good means of preventing red spiders;
In addition, the easiest way is to strengthen ventilation, which can avoid red spiders to a large extent.
In the daily maintenance, we can also sprinkle some small white medicine in the pot soil every one or two months for prevention.
If you already have a red spider in your monthly season, we must actively start to treat it, after all, with the reproduction rate of red spiders, if you are not careful, the moon season will suffer.
Red spiders are more afraid of moisture, so flower lovers who don't want to use drugs can try to wash them with high-pressure water guns.
Red spiders have both sides of the leaf, so both sides should be taken care of when scouring, which can reduce the existing red spiders to a certain extent.
If you want to kill the red spider more thoroughly, you need to use medicine.
Golden branches, imidacloprid, and aika mite can be sprayed in proportion to water, and it is best to rotate them, which can not only eliminate the red spider, but also effectively avoid the decline in the efficacy caused by the resistance of the red spider.
-Thrips-
Description of the disease: Waiting for the long leaves of the moon to bloom happily, but found that the leaves and buds of the moon season seemed to be scorched and twisted and yellow, and it was strange that the sun was obviously not so poisonous?
Be careful, this could be a thrips.
Why it happens: Plants and soils often have thrips eggs left, which hatch once they reach the right temperature. It usually emerges diurnal and nocturnal, so during the day, you may not notice any obvious pests on your own season.
Once at night, herds of thrips sneak out and suck the juices of the young leaves and buds of the moon, which is why the moon looks like it is scorched.
Prevention and control means: Although the thrips look menacing, in fact, the drug resistance is very poor, and the basic small white medicine and imidacloprid can solve them.
Before the thrips flood, we must prevent it in advance, and we can use the broad-spectrum insecticide imidacloprid to spray with water in a ratio of 1:1000, which can achieve the effect of preventing a variety of diseases and insect pests.
If you already have symptoms of thrips in the monthly season, spraying imidacloprid with water at a ratio of 1:1000 in the evening when the thrips are about to come out can give them a fatal blow "before meals". At the same time, thrips can also be adhered by hanging a blue plate.
In addition, we can also cooperate with the burying of small white medicines into the pot soil, and the aspiratory drugs will act on the residual thrips, so that the thrips infestation can be perfectly solved!
disease
Of course, in addition to pests, the monthly season may also face diseases caused by various germs.
-Dark spot disease-
Description: Black spot disease is arguably the most common disease in the month.
At the beginning of the disease, the leaves of the moon usually have a small reddish-brown or purple-brown spot, which gradually expands as the disease worsens until the final leaf withers and falls off.
In severe cases, only a few new leaves on the top of the plant will remain in the whole month, and the rest will all die, which will seriously affect the normal growth of the plant.
Causes: The development of black spot disease is also associated with many causes.
It is a fungal disease, the pathogen will be on the remnants of the disease overwintering, with the help of rain or sprinkler water splash spread, insects are also one of its transmission routes.
The wet environment at around 26 °C is most susceptible to black spot disease, that is, around April and May in the spring, and if the environment is not ventilated, the situation may be worse.
Prevention and control means: How can we prevent dark spots?
First, we need to start with prevention.
● Timely cleaning up of dead branches and leaves in the conservation site can effectively reduce the residue of black spot bacteria;
● At the same time, the maintenance environment should be ventilated and transparent, and the leaves can be dried quickly when there is water to avoid the invasion of pathogens;
● The use of carbendazim sprays for preventive purposes can also help reduce the chance of infection.
Secondly, when you have the symptoms of dark spots in the month, you must cut off the diseased leaves and branches in time, and then spray bactericides: ether esters, Kenda, Daisen manganese zinc, etc. are all good choices.
-White Powder-
Description: White powder is a condition with the same frequency of dark spots as the monthly season.
It is mainly manifested by whitishing on both sides of the leaf, accompanied by white powdery spots, and the area of dark spots on the leaves will continue to expand as the condition gradually worsens.
Causes of disease: The environment is hot and humid and not ventilated, which will often cause powdery mildew infection in the monthly season, and the plants will be too dense and poor light transmission.
Prevention and treatment means: The prevention and treatment of powdery mildew can also take the means of prevention + treatment.
● In the early prevention stage, attention can be paid to the timely ventilation of the maintenance environment and the spacing between plants;
● In winter, the use of stone sulfur compound for garden clearance;
● Usually regular spraying, carbendazim bacillus and other drugs can be used as a prevention, according to the ratio of 1:1000 weekly fixed spraying can be effective prevention.
When the moon season has been infected with powdery mildew, it can be used for treatment, such as taking the enemy stability and Lunasen, etc., and it is also necessary to pay attention to the front and back sides of the leaf to be sprayed when spraying to reduce the residue of germs.
A qualified flower farmer will always be smart to recognize the truth that prevention is greater than cure, so small partners must pay more attention to the state of the month, and promptly kill the signs of diseases and insect pests in the cradle, I believe that under your careful maintenance, the moon season will be full!