A complete Collection of Disease and Pest Control of Petunia

Petunia needs regular pest control and maintenance in order to ensure its long-term beautification effect and aesthetic value. Let's learn about the threat of diseases and insect pests to Petunia.

Petunia white petunia disease

White petunia disease is the most harmful to the leaves, petioles and tender stems of Petunia. The leaves infected by the disease will produce light green spots at first, then slowly turn into light yellow, and then turn into large disease spots when the disease is further deepened. In the later stage, there will be a white scar on the back of the infected leaves, and the damaged tender stems will cause flowers and stems to grow distorted, when the disease spots spread and surround the petioles and shoots. It will cause some of the hosts above the ring section to grow abnormally until they atrophy and die.

Solution method

It is better to spray 1% Bordeaux solution or 50% Phytophthora solution at the initial stage of infection and spray once every 10 to 15 days.

White mildew of petunia

White mildew is the most serious damage to leaves, the initial bacterial infection is characterized by patches of white spots, the later aggravation will lead to the shedding of infected leaves.

Solution method

After the appearance of the initial symptoms, the diseased leaves were removed as soon as possible, and the 75% concentration of chlorothalonil was sprayed in time.

Petunia leaf spot

Leaf spot disease mainly harms the leaves of petunia, which can also lead to the death of the whole plant in severe cases.

Solution method

The diseased leaves should be removed and burned in time, and the surrounding fallen leaves should be removed as soon as possible; spray 1000 times the concentration of benzoylammonium.

Petunia virus disease

If the petunia plant grows slowly and the rhizome is weak, it is very likely to be infected with virus disease, and the leaves will be yellowed in severe cases.

Solution method

Spray 1000 times the solution of omethoate with 40% concentration.

Aphids

Aphids are the most common and main pest of petunia, which can cause serious erosion on the leaves and tender stems of petunia.

Solution method

When a large number of aphids appear, isolation measures should be taken and sprayed with 10% concentration of omethoate emulsion 1000 times or dichlorvos emulsion 1000 times or Mala sulfur emulsion 1000 times or high concentration imidacloprid (70% concentration) water dispersible granules 15000-20000 times.