Attention should also be paid to the control of diseases and insect pests of flowers in spring.

Spring is a big world for flowers to grow and transplant, but during this time flowers will also have a variety of diseases. The editor reminded that while reasonably fertilizing flowers and pruning, we should also pay attention to the prevention and control of diseases and insect pests.

Chinese rose

With the rise of temperature and the growth of flowers and trees, all kinds of diseases and insect pests follow. As a manager, flowers and trees should be inspected at any time for symptomatic prevention and treatment. At present, the main chemical pesticides used for pest control are as follows: 1000 times of omethoate for aphids, 2000 times of pyrethroids (such as 2.5% of dimethoate, 20% of quick kill) for Lepidoptera insects, 20% of dicofol for mites, 1000 times of omethoate for scale insects, but the control time must always be in the peak incubation period of the first generation of larvae. The period from mid-May to early June is a critical period. When the young scale forms a protective wax shell, the general pesticide control is very difficult. Prevention and control of diseases is more important than treatment. For those varieties of flowers and trees that are prone to disease, they should be checked frequently. Once a small number of disease spots appear, it is necessary to pay close attention to spraying prevention and control, but there are also some diseases, and germs have invaded as early as the bud. For these diseases, spray control should be carried out as soon as possible. Generally, 70% thiophanate methyl 700-fold solution or 50% carbendazim 500-fold solution can be sprayed every 7 days for 2 to 3 consecutive times for comprehensive control.

Prevention and Control of Diseases and insect pests in Family Flower cultivation in Spring

There are more diseases and insect pests of flowers in spring, and the damage is more serious in April and May. The common diseases and insect pests of flowers in spring are powdery mildew, rust, black spot and so on. The following is to share with you the prevention and control of diseases and insect pests in family flower cultivation in spring. In order to raise your flowers well, let's take a look.

General methods for prevention and control of diseases and insect pests in family flower cultivation in spring:

The main results are as follows: 1. Keeping the environmental hygiene of flower cultivation can reduce the harm.

2, protect the plant, do not break the skin, be injured, beware of germs invasion.

3. Pre-disinfection of culture can kill germs and pests.

4. Strengthen daily management, keep proper water and fertilizer, smooth air, suitable temperature and daylighting, so as to make the plant grow healthily and control the breeding and spread of diseases and insect pests.

Prevention and Control of Diseases and insect pests in Family Flower cultivation in Spring

The following describes the specific prevention and control of related insect pests:

I. aphids

Aphids (greasy) hibiscus, green peach, mulberry, rose, honeysuckle and so on are easily harmed by aphids. With the rise of temperature, aphids are also increasing, which must be prevented.

Prevention and control methods: 1. 40% omethoate or 50% imidophos are sprayed on water 1200-1500 times.

2. A small amount of potted flowers can also be sprayed with 70% 100 times neutral laundry powder.

2. Red spider

Red spider jasmine, Fusang, asparagus, rose, dahlia and so on began to do harm in early April.

Prevention and control methods: a small number of potted flowers often rinse the front and back of the leaves with tap water, or spray or dip in 100% 150 times of batter water that has been boiled and cooled, and rinse again with clean water in a day or two, which can achieve obvious results.

3. Scale insects

Scale insects (flower lice) most of the scale insects on Magnolia, rose, yellow poplar and Haitong began to hatch from mid-April to mid-May.

Prevention and control methods: 1. Brush off the insect body artificially before hatching.

2. Check frequently and spray 40% omethoate 1000-1500 times during the larval incubation period.

Fourth, blight disease

When the temperature reaches 20 ℃, the newly sown flowers, saplings and some flowers with rotten roots are very easy to develop blight when the soil humidity is high.

Control methods: 1. Before sowing, mix 1.5-4kg pentachloronitrobenzene with 70% per mu evenly in the soil.

2. Control watering in the young stage of the seedlings, so as not to make the soil too wet.

3. When diseased seedlings are first found, irrigate 1% ferrous sulfate or 200 times 400 times 50% Dysenamine solution, and irrigate 2-4 kg potion per square meter.

5. Rust

Rust begonia rust is easy to damage a large number of flowers and trees after rain in April and May, and rose rust occurs when roses are budding.

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% trimethoprim 700m 1000 times solution in the initial invasion period.

6. Powdery mildew

Powdery mildew of rose, impatiens and yellow mildew mostly occur in May and June, and it is easy to cause symptoms such as yellow leaves, withered leaves and twisted shoots 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% trimethoprim at the first dyeing stage with 700m 1000 times solution.

Prevention and control of main diseases and insect pests of flowers in spring

When spring comes, there are many diseases and insect pests in all kinds of flowers, and the more serious ones are as follows:

Aphids (greasy): hibiscus, green peach, mulberry, rose, honeysuckle and so on are vulnerable to aphids. With the rise of temperature, aphids are also increasing, which must be prevented.

Prevention and control methods:

1.40% omethoate or 50% imidophos is sprayed 1500 times on water 1200 Mel.

2. A small amount of potted flowers can also be sprayed with a neutral laundry powder of 100 times as much as 70 Murray.

Red spider: harm to jasmine, Fusang, asparagus, rose, dahlia and so on from early April.

Prevention and treatment methods: a small amount of potted flowers often rinse the front and back of the leaves with tap water, or spray or dip them in 150 times the batter water that has been boiled and cooled, and rinse again with clean water in a day or two, which can achieve obvious results.

Scale insects (flower lice): most of the scale insects on Magnolia, rose, yellow poplar and Haitong begin to hatch from mid-April to mid-May.

Prevention and control methods:

1. Gently brush off the worm body before hatching.

2. Check frequently and spray 40% omethoate 1000 Mel 1500 times during the larval incubation period.

Rhizoctonia solani: when the temperature reaches 20 ℃, newly sown flowers, saplings and some flowers with rotten roots are very prone to blight when the soil moisture is high.

Prevention and control methods:

1. Before sowing, mix 70% pentachloronitrobenzene 1.5 ml / mu with 4 kg of soil evenly.

2. Control watering in the young stage of the seedlings, so as not to make the soil too wet. 3. When diseased seedlings are first found, 1% ferrous sulfate or 200 Mel 400 times 50% Dysenamine solution should be irrigated, and 2 Mel 4 kg potion per square meter should be irrigated.

Rust: begonia rust is easy to damage a large number of flowers and trees after rain in 4mi-May, and rose rust occurs when roses 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% of strychnine 700murmur1000 times during the initial invasion period.

Powdery mildew: powdery mildew of rose, impatiens and yellow mildew mostly occurred in 5 May-June. It was easy to cause symptoms such as yellow leaves, withered leaves and twisted shoots 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 a 1000-fold solution of 700Murray.