Common Pests and Diseases of Gardenia and the Latest Control Methods
Gardenia is a highly ornamental flower that looks pure white and clean, and it is also very versatile, and can even be eaten by people~ But for many flower growers, how to control gardenia diseases often becomes a very headache-inducing problem. Next, this editor will bring you some common pests and diseases of gardenia and their treatment methods. Come and take a look with the editor!
1. Red spider mite
Symptoms of damage:
The red spider mite is a parasitic pest. It often parasitizes the underside of gardenia leaves, feeding on the sap of gardenia leaves as its nutrient source to survive. Affected by red spider mite parasitism, gardenia will lack nutrients, which in turn causes the leaves to turn yellow and growth to weaken. In addition, red spider mites reproduce very quickly in high-temperature and dry environments.
Treatment methods:
⟦NL>1. If the environment is very dry, you can often spray some water mist and use some humidifying methods to increase humidity. At the same time, this also has a certain effect of lowering the temperature, thereby inhibiting the reproduction of red spider mites and not creating favorable conditions for their reproduction. 2. If red spider mites are found, they can be immediately washed off with clean water to directly eliminate them. 3. If conditions at home allow, you can soak yellow tobacco leaves or leftover unfinished cigarette butts in water and then spray the solution, which has a better insecticidal effect.
2. Scale insects
Symptoms of damage:
Scale insects are pests that survive by sucking the sap of the plant. Although these insects are small in size, their destructive power is great. In mild cases of affected plants, the leaves turn yellow and fall off, and plant growth weakens; in severe cases, the entire plant dies. The impact on the growth and development of gardenia is very great.
Treatment methods:
Scale insects are relatively small and often gather in a pile in one place, and they secrete a waxy substance. From a distance, they look like a pile of white waxy powder. You only need to use a wooden stick to pick them off and crush them to death, or eliminate them by spraying a 1000-times solution of 80% dichlorvos. Every year in early spring, spraying gardenia with 0.2-0.5 degrees lime sulfur mixture can eliminate insect eggs. This method has a great effect on preventing the occurrence of pest damage.
3. Gardenia leaf spot and blight
Symptoms of damage:
Leaf spot and blight is a disease caused by fungi, and the main affected part is gardenia leaves. When the disease occurs, the gardenia plant will develop round yellow-brown diseased spots with a diameter of 2-4 cm, and there will be many small black dots on the leaf edges. Do not place gardenia in a very humid environment, otherwise it will increase fungal reproduction and thus raise the incidence rate.
Treatment methods:
When growing gardenia, be sure to pay attention to indoor ventilation and light transmission, reduce the humidity in the air, and water appropriately. If conditions permit, the plant can be placed outdoors for cultivation. In the early stage of the disease, promptly remove the diseased leaf parts that have already been affected to prevent infection of other leaves, and keep diseased plants separate from other normal unaffected plants to avoid cross-infection. When the plant is diseased, you can spray Bordeaux mixture or zineb solution for control, spraying 3-4 times a day, once every 7-10 days, and it can be cured.
4. Gardenia chlorosis
Symptoms of damage:
Gardenia chlorosis mainly harms the leaves of the flower and is a physiological type of damage. When the disease occurs, the leaves gradually turn yellow, and the plant grows slowly and gradually wilts.
Treatment methods:
If the plant is found to be turning yellow, you can spray the leaf surface or irrigate the roots with a 0.2-1% ferrous sulfate solution. When irrigating the roots, the concentration can be adjusted higher. It is best to spray after the morning dew has completely dried, and expose it to the sun after spraying. If the yellowing is very severe, it can be sprayed once every week, but be sure to control the concentration of the solution well to avoid burning the roots. After a period of time, the plant leaves will return to their original green color.
4. Gardenia sooty mold
Symptoms of damage:
Gardenia sooty mold mainly occurs between the branches and leaves. When the disease occurs, brown-white diseased spots appear on the branches and leaves, causing branch growth to stop and the plant to gradually wilt.
Treatment methods:
When the disease is found, promptly use clean water to wipe off the white fungal matter on the branches and leaves, or spray 1000-1200 times carbendazim and Baume degree lime sulfur mixture for comprehensive treatment.
5. Gardenia rot disease
Symptoms of the disease:
It mainly harms the main trunk part of the plant. Below the main trunk, the stem will become enlarged and split, and the main trunk will gradually shrink and rot.
Treatment methods:
When the flowers fall, promptly cut off the withered branches and thin out the branches to reduce nutrient consumption and thereby promote the growth of the main trunk. If the stem is found to be rotting, be sure to promptly scrape off the rotten part and apply 5-10 degrees lime sulfur mixture several times.
The above are the common diseases of gardenia and their treatment methods. I hope this article can help you and let your beloved flowers grow healthily! If you want to learn more related knowledge, please pay more attention to this site!