Common diseases and insect pests of flowers in spring, explore high-yield cultivation techniques of edible fungi

The temperature in spring is suddenly warm and cold, and there are the following kinds of diseases and insect pests that harm flowers from April to May:

Aphids

Hibiscus, green peach, rose, honeysuckle and so on are vulnerable to aphids. With the rise of temperature, aphids are also increasing. Prevention and treatment: imidacloprid and acetamiprid are sprayed, and a small amount of laundry powder can be added to enhance the efficacy.

Red spider

It has been harmful to jasmine, asparagus, rose, dahlia and so on since early April. Prevention and control methods: the use of acarine, avermectin for prevention and control.

Shell worm

(flower lice) most of the scale insects on Magnolia, rose, lobular yellow poplar and crape myrtle begin to hatch from mid-April to mid-May. Prevention and control methods: 1. Brush off the insect body manually before hatching. 2. Spraying chlorpyrifos and cyhalothrin during the larval incubation period.

Blight disease

When the temperature reaches 20 ℃, newly sown flowers, saplings and some flowers with rotten roots are very prone to bacterial blight when the soil moisture is high. Control methods: 1. Use the special seed coating agent for flowers to mix seeds before sowing. 2. Control watering at the seedling stage so as not to make the soil too wet. 3. At the beginning of the disease, irrigate 1% ferrous sulfate or spray mancozeb.

Rust disease

Rose rust infects roses when they are in bud. Prevention and control methods: 1. When the rose sprouts, the first yellow bud should be removed and burned in time to eliminate the source of infectious disease. 2. Spray 15% triadimefon 700Mel 1000 times solution in the initial invasion period.

Powdery mildew

Rose powdery mildew and impatiens powdery mildew mostly occur from May to June, which are easy to cause yellow leaves, withered leaves, tender shoot bending and other symptoms in summer. Prevention and control methods: 1. Pay attention to the ventilation and light transmission of flowers. 2. Apply less nitrogen fertilizer and more phosphorus and potassium fertilizer. 3. Spray 15% strychnine at the first dyeing stage with 700Mel 1000 times solution.