Control methods of morning glory diseases and insect pests

1. Brown spot disease

Symptoms: when the disease occurs, round or polygonal spots appear on the leaves, usually dark gray in the middle and dark brown at the edges. The surface of the disease spot will produce a lot of light black mildew layer, in severe cases, the disease spot will be covered with the whole leaf, the leaf withered.

Prevention and treatment methods: it can be planted closely to avoid excessive watering and remove the diseased leaves in time; spray Guoguang must be fresh in time at the initial stage of the disease, once every 7-10 days and 2-3 times continuously.

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.

Petunia (Pharbitis nil (L.) Choisy) is an annual twining herb belonging to the genus Petunia of the family Petunia. The flower of this plant is very trumpet-shaped, so it is called trumpet flower in some places. Planting morning glory is generally sown in spring and blossoms in summer and autumn. There are many varieties, such as blue, scarlet, peach red, purple, etc., as well as mixed colors, and there are many changes at the edge of petals, which is a common ornamental plant. The fruit is ovoid and can be used as medicine. Morning glory leaves trifid, base cordate. The flowers are white, purplish red or purplish blue, funnel-shaped, and the whole plant has coarse hairs. The florescence is at its peak in summer. Seeds have medicinal value.

The main disease is powdery mildew. After being killed, the stems and leaves are twisted and atrophied, and after they are found, they can be pulled out and destroyed in time, and 50% carbendazim can be sprayed 500 times. The main pests are aphids. Can be sprayed with selenium 50% dichlorvos 800 murine salt solution. Other control methods refer to melon and leaf chrysanthemum, a string of red, rose pest control part. White rust control [symptoms] the main sites of white rust 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 incidence regularity] the pathogen is Albugoipomoeae-panduranae, 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. Generally, the disease was at its peak from August to September, and the morning glory was planted in the carrier and became the source of infection in the following year. Pay attention to the prevention of quenching disease in the seedling stage, especially in the seedling stage, in addition to doing a good job of disinfection, sparse sowing, adequate light, good ventilation, suitable temperature and not excessive waterlogging can also greatly reduce the incidence of the disease. once the disease occurs, the diseased plants should be pulled out in time. It is generally easy to control the use of Prik, Phytophoretin, root disease and other agents for soil irrigation. Sow seeds when the temperature is high, and prevent rot at the seedling stage. Diseases are not easy to occur after mature seedlings, but some diseases can still occur due to the influence of cultivation environment. Botrytis cinerea, Fusarium wilt and physiological diseases should be prevented, and carbendazim + streptomycin can be sprayed every 7 to 10 days. Once the disease occurs, the disease should be treated in time according to the actual situation. Pests should pay attention to the prevention of aphids, red spiders, cabbage insects, especially to control Liriomyza huidobrensis, to pay attention to observation, in the initial outbreak of insect pests timely spraying relevant agents, generally easy to control. [prevention and treatment methods] the diseased plants were removed and destroyed by ① in time. To reduce the infection of seeds. ② selected disease-free seeds as cultured seeds, and the seeds should be disinfected 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. Morning glory diseases and insect pests and their control methods

Morning glory brown spot

When morning glory occurs, round or polygonal disease spots will appear on the leaves, with dark gray in the center and dark brown on 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.

Prevention and control methods: properly close planting, avoid excessive watering, timely removal of diseased leaves

At the initial stage of the disease, Guoguang must be sprayed in time, once every 7-10 days, and continuously sprayed 2-3 times.

Morning glory quenching disease

Morning glory is crawling, but lodging can 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.

Morning glory pest

There are fewer pests in family breeding morning glory, unless your home is particularly sloppy, there are generally few insect pests. Morning glory common pests are: aphids, leaf rollers, red spiders, cabbage insects. Pay attention to observation during maintenance and find that insects can be sprayed with related agents. Click to learn about specific pest control methods? Flowers also have the trouble of being attacked by insects)