Disease and pest control of morning glory

Morning glory for pest control and disease prevention:

[symptoms] the main sites of the disease were leaves, petioles and tender stems, and the damaged leaves had light green spots on the leaves at the initial stage. After that, it gradually became light yellow, the edge was not obvious, and when it was serious, it expanded into a large disease spot, and in the later stage, a white scar appeared on the back of the disease part. when it ruptured, it emitted white powder, which was the cyst spores of the pathogen, and when the tender stem was damaged, the flowers and stems were twisted. When the disease spot surrounded the petiole and shoot, the host part above the ring cut grew poorly, shrunk and died.

[pathogen and disease regularity] the pathogen is white rust, which belongs to the genus white rust. The pathogen overwintered as oospores in the diseased tissue. In the following spring, the oospores germinated and produced sporangia, which invaded the petunia and other plants of the family Petunia. The peak period of the disease was from August to September, and the morning glory was planted in the carrier and became the source of infection in the following year.

[prevention and control methods]

The diseased plants were removed and destroyed by ① in time. To reduce the infection of seeds.

② selected disease-free seeds as propagation seeds, and the seeds should be sterilized before sowing. Avoid rotation with plants of Convolvulaceae.

Spraying 1% Bordeaux solution or 50% Phytophthora 500 times solution at the initial stage of ③, spraying once every 10 to 15 days has a better control effect.

two。 Cataplexy

Symptoms: morning glory is originally creeping, but lodging may also occur. At the time of the disease, the whole plant drooped and fell on the ground, and the leaves gradually yellowed and rotted.

Prevention and treatment methods: once the disease occurs, the diseased plants should be pulled out in time, and the soil should be irrigated with Purek, Shengshuangling, root disease cure and other medicaments. it can also be prevented and treated with chlorothalonil and methyl topiramate 800 / 1000 times.

What should we do when morning glory grows? the common diseases and insect pests of morning glory / aphids do great harm.

Morning glory, one of the most common flowers in daily life, is often found on the side of the road in the wild, and is now potted at home by many flower friends. But indoor is not compared to outdoor, morning glory environment needs us to create, a little wrong, morning glory will be disturbed by diseases and insect pests, then morning glory worms how to do? It's easy to find out what kind of bug it is and solve it. The following is the prevention and control of common diseases and insect pests of morning glory. Come in and have a look.

First, morning glory worms how to do, spray with medicine

In the breeding method of morning glory, we know that morning glory has requirements for soil, water, light and so on. Once the morning glory is not up to the standard, the insects will come. As for the morning glory worms, it is very simple to spray them with medicine. Morning glory pest control is what flower friends should master, the specific pests and diseases, we continue to look down.

(1) Pest symptoms and solutions of morning glory.

Generally speaking, potted morning glory is rarely infested by insects, but if your home is particularly sloppy, it will naturally attract many pests. Generally speaking, the common pests of morning glory are aphids and leaf rollers, which can be sprayed and killed after discovery. The specific use is as follows:

1. Aphids

Aphids are the most common and main pest of morning glory, which mainly harms the leaves and young stems of morning glory, and will cause serious erosion. Not only that, honeydew secreted by aphids can attract ants and cause soot or other fungal diseases.

Solution: natural enemies can be used to kill, such as red-lipped ladybug, Japanese square beetle, red ring ladybug and so on, which play a better role in preying on aphids. However, when a large number of aphids are found, isolation measures should be taken and 1, 000 times of omethoate or pyrethroid should be sprayed in turn.

2. Red spider

This insect is one of the main pests of morning glory, which is rare. But once it is infested by red spiders, it is a headache. The way of doing harm is to suck the juice from the leaves of flowers with mouth organs, so that the chlorophyll of flowers is destroyed, the leaves show gray-yellow spots or patches, and the leaves become withered and yellow, or even fall off.

Solution: when finding the above symptoms, it should be noted that if individual leaves are damaged, insect leaves can be removed; when more leaves are damaged, spraying should be carried out as soon as possible. The commonly used pesticides are propargite, dicofol, dimethoate, Huachongjing, and so on.

(2) Disease symptoms and solutions of morning glory.

Morning glory worms how to do, read the above content we should know how to do it! However, in addition to being attacked by insects, the disease also endangers morning glory all the time. The common diseases of morning glory are: White mildew, leaf spot, virus disease and seedling quenching disease. The specific symptoms and solutions are as follows:

1. White mildew

The disease is one of the main diseases of morning glory, it mainly harms the leaves of morning glory, the symptoms are: the leaves appear in patches of white spots, the later aggravation will lead to the shedding of infected leaves.

Solution: after finding the above symptoms, remove the diseased leaves as soon as possible, and timely spray 75% chlorothalonil 600-800 times liquid.

2. Leaf spot

Leaf spot disease, which generally occurs after wind injury, sunburn and frost injury, mainly harms the leaves of petunia and, in severe cases, can also lead to the death of the whole plant.

Solution: remove the diseased leaves in time and burn them, and remove the surrounding fallen leaves as soon as possible; spray 1000 times the concentration of Dysenamine.

3. Brown spot

The disease is also one of the main diseases of morning glory, when the disease occurs, there will be round or polygonal spots on the leaves, dark gray in the center and dark brown at the edge. Disease spot surface will produce a lot of light black mildew layer, serious disease spot will not be covered with the whole leaf, the leaf withered.

Solution: remove the diseased leaves in time; spray Guoguang must be fresh in time at the initial stage of the disease, spray once every 7-10 days, and spray continuously for 2 or 3 times.

4. Virus disease

Virus disease, one of the main diseases of morning glory, symptoms: morning glory appears slow growth and weak rhizome, which is very likely to be infected with virus disease, serious leaves will appear yellowing phenomenon.

Solution: remove the diseased leaves and spray 1000 times of omethoate.