Common diseases and insect pests of gardenia and their control methods

Gardenia is a very ornamental flower, looks pure white and clean, and has a wide range of uses, and it can also be used for people to eat ~ but for many flower growers, how to prevent and control the diseases of gardenia has often become a headache. Next, this editor will bring you some common diseases and insect pests of gardenia and treatment methods, follow the editor to have a look!

one。 Red spider

Performance of hazards:

Red spider is a parasitic pest, it often parasites on the back of gardenia leaves, sucking the juice of gardenia leaves as a source of nutrition for its own survival, affected by the parasitism of red spiders, gardenia will lack nutrients and lead to leaf yellowing and growth weakness. In addition, red spiders can reproduce very fast in high temperature and dry environment.

Treatment:

1. If the environment is very dry, you can often spray some water mist and some wet means to increase the humidity, at the same time, it also has a certain effect on reducing the temperature, thus inhibiting the reproduction of the red spider and not creating favorable conditions for its reproduction. two。 If you find a red spider, you can immediately rinse it with clean water and destroy it directly. 3. If there are conditions in the family, you can use yellow tobacco leaves or spray the remaining cigarette butts after soaking in water, the insecticidal effect is better.

two。 Scale insect

Performance of hazards:

Scale insect is a kind of pest which can survive by sucking plant sap. Although the insect is small, it can kill a lot. If the diseased plant is light, the leaves will fall off yellow, the plant growth will be weak, and the whole plant will die, which has a great effect on the growth and development of Gardenia jasminoides.

Treatment:

Scale insects are small in size, often gather in one place and secrete wax, which looks like a pile of white wax powder from a distance. Just pick it off with a stick and crush it to death, or wipe it out by spraying 1000 times of dichlorvos. At the beginning of spring every year, spraying 0.2-0.5 degree stone sulfur mixture on gardenia can destroy insect eggs. This method plays an important role in preventing the occurrence of pests.

three。 Gardenia spot blight

Performance of hazards:

Spot blight is a disease caused by fungi, which mainly damages the leaves of Gardenia jasminoides. During the onset of the disease, gardenia plants will appear round yellow-brown spots with a diameter of 2-4cm, and there will be many small black spots on the edge of the leaves. Do not put gardenia in a very humid environment, otherwise it will increase the reproduction of fungi and increase the incidence of disease.

Treatment:

When breeding gardenia, we must pay attention to indoor ventilation and light, reduce the humidity in the air, the right amount of watering, if conditions permit, the plant can be put outside for cultivation. In the early stage of the disease, the diseased leaves should be removed in time to prevent the infection of other leaves, and the infected plants and other normal plants should be separated to avoid cross-infection. When the disease occurs, the plant can be sprayed with Bordeaux solution or Dyson zinc solution, 3-4 times a day and once every 7-10 days.

four。 Gardenia yellowing disease

Performance of hazards:

Gardenia yellowing mainly harms the leaves of flowers and is a physiological hazard. When the disease occurs, the leaves will gradually turn yellow, the plant will grow slowly and wilt gradually.

Treatment:

If the plant is found to be yellowing, 0.2-1% ferrous sulfate solution can be used to spray the leaves or irrigate the roots, and the concentration can be adjusted higher when watering the roots. It is best to spray after the dew is dry in the morning and bask in the sun after spraying. If the yellow flower is very serious, it can be sprayed once a week, but be sure to control the concentration of the solution so as not to burn out the roots. After a period of time, the leaves of the plant will return to their original green.

four。 Gardenia soot disease

Performance of hazards:

The soot disease of Gardenia jasminoides mainly occurs between branches and leaves, and brown and white disease spots will appear on branches and leaves, resulting in the cessation of branch growth and the gradual wilting of plants.

Treatment:

It is found that the white bacteria on the branches and leaves should be wiped with clear water in time, or sprayed with 1000-1200 times carbendazim and Baumedu stone sulfur mixture for comprehensive treatment.

five。 Gardenia rot

Manifestations of the disease:

The main harm to the trunk of the plant, the stem will appear below the phenomenon of hypertrophy and cracking, the trunk gradually atrophied and rotted.

Treatment:

When the flowers fall, the withered branches should be cut off and thinned in time to reduce the consumption of nutrients so as to promote the growth of the trunk. If you find that the stalk is rotten, you must remember to scrape off the rotten stalk in time and apply 5-10 degree stone sulfur mixture several times.

The above is about the common diseases and treatments of gardenia. I hope this article can help you and let your love flowers grow healthily! If you want to know more related knowledge, please pay more attention to this site!