What diseases should be prevented by rose in winter

Black spot: the number one disease this summer, now the prevention effect is better!

The rainy season is coming, and friends with flowers are happy: God watered me.

It's really young and easy! What about black spot, which is called the number one disease in summer? Gently grow a few spots, the leaves become bald.

Many flower lovers do not like medication, but black spot disease is not drugged, so their growth will have a direct impact on the number of flowers in autumn and next spring. So listen to me about the rainy season, but we need medicine! !

-reveal the true face of black spot-

There is black spot on the leaves.

When the flower seedlings were just infected with black spot, brown spots appeared on the leaf surface, and then spread into dark brown spots in the radial direction.

Black spot disease often occurs in summer plum rain season, high temperature and high humidity. The main reason is mold: spores on the lesions are contagious by splashing and splashing on the surrounding leaves.

Under the catalysis of high temperature in summer, Rain Water remained in the leaves for more than 4 hours, and the spores of the black spots began to germinate.

In addition to Meiyu, the branches are dense, foliar spraying a lot of water, fog spread, black spot is also very fast, the disease is more serious.

We have a test field that never sprays.

And then it turned out like this. . .

-Black spots: great prevention-

Black spots are mainly based on prevention.

Although it is very harmful, fortunately, as long as prevention is timely, it can basically prevent the occurrence of disease (marked!).

Prevention:

? Always clean the leaves.

Don't leave the beads on the leaves for too long.

Observe the flower seedlings every day, if you find any pathological changes, deal with them immediately.

Seedlings should not be planted / placed too densely. Basal branches should be trimmed regularly to ensure ventilation.

? Spray prevention: spray every 4 days to prevent it; spray again after continuous rainfall for more than 4 hours.

Drug treatment recommendations:

Take enemy stabilizers, difenoconazole, renaissance (flusilazole)

-treatment tips-

At any time, it is always better to take steps to make amends rather than indifference. So, if your rose has fallen into a black spot, do it.

You have a chance to save it!

Treatment:

When black spot is found, remove the diseased leaves (do not pick it when there are few leaves).

? Spray: same as above. I don't bother to turn it over to show you: spray it every 4 days; if it continues to rain for more than 4 hours, spray another medicine immediately. )

Drug treatment recommendations:

Take enemy stability, difenoconazole, revival (fluazol), tribe, Ami Miao, Shigao, Lunassen, Lunarun

* Note: during the rainy season, the rain will not stop. Many people mistakenly think that there is no chance to spray. But in fact, it didn't rain from morning till night. When the rain stops for a short time, it will be sprayed. Even if sprayed, it will have an impact. If not sprayed by Rain Water and Rain Water, it will cause the spread of black spot. It is too late for remedial measures after the outbreak.

* attention? Powdery mildew and black spot are treated with the same drugs.

END

What should I do if I have black spots on potted roses? This method can be prevented!

Rose is poorly managed and has gained a black spot. Rose black spot is a very serious fungal disease with rapid spread and high injury. If you have a month of cure, if you don't get good treatment, it's easy to break out. Today brings you novice rose maintenance-rose black spot!

Rose black spot is a worldwide disease that occurs in the country and is mainly caused by leaves, followed by petioles, leaf tips, young shoots and pedicels. In the south and north, the incidence of the disease is higher. The disease causes the leaves to turn yellow and fall. When diseases are serious in summer and summer, as well as in late summer and September, all leaves fall, destroying roses, roses and autumn blossoms. The strike seriously weakened the trees.

Route of transmission: with the spread of Rain Water or sprinkler, insects will also spread. The better starting temperature is about 26 degrees Celsius. In the rainy season, the host plant is seriously ill, new transplantation, more damage to the root system, the growth is easy to occur.

How to prevent it?

The disease is prone to overcast and rainy weather, sudden heat, high humidity and airtightness. Second, the soil is not good or there are such diseased objects around. Spraying carbendazim or mancozeb in cloudy and rainy weather can prevent it. In such a serious stage, professional fungicides such as difenoconazole, flusilazole and so on should be used. Leaves that can be trimmed and need to be cleaned. Use scissors and need to be sterilized after use.

And leaves should be carefully installed and burned. After applying fungicides, good fermentation fertilizers must be used and conditioned and germinated within 7 days. This is mainly to reduce losses. Because of the dark spots in the season, most of the leaves cannot be used, and some branches need to be pruned. For roses, this is a very big operation. At this time, we need to quickly restore the season.

Many people just pay attention to treatment, often ignoring the subsequent recovery. The nephew caused the rose, which will grow slowly for a long time, affecting the flowering for a whole year. Therefore, when you treat dark spots, you should always add nutrition to the leaves of roses and increase humidity by the way. After the high temperature, the moon needs a certain amount of humidity to sprout, so the general 15-day season begins to sprout a lot.

After germination, manganese and zinc are sprayed once a month. This can protect the moon from getting dark spots, which is very important! Entering the June pit stop season is dangerous and everyone should be cautious

Time: 2019-05-07 Click: