How to identify flower diseases and insect pests? Identification method of diseases and insect pests in courtyard flowers

There are many kinds of flower diseases and insect pests in the courtyard, and the control methods are not the same. For effective prevention and control, timely detection, correct identification and diagnosis of diseases and insect pests, it is particularly important to prescribe the right medicine to the case. Let's take a look at the identification methods of flower diseases and insect pests in the courtyard with the editor of Huinong Network.

(1) the flowers and seedlings are dead and lodging, and the ridges are broken due to lack of seedlings.

It is usually the result of blight caused by tube hair organisms and fungi, or by underground pests such as grubs and mole insects.

(2) there are spots of different shapes and colors on the leaves.

There are withered spot, brown spot, macula, wheel spot, white spot, mildew spot, coal pollution and so on, mostly caused by fungi. On the other hand, there is a halo around the spot, and sometimes the perforation or leaf decay is often caused by bacteria. Leafy flies and moths can cause withered spots on the leaf surface, but there are many slender insect tracks and insect droppings excreted in the insect tracks. The spots caused by sunburn and chemical injury are mostly brown or yellow-white, and there are no gray molds, small black spots and so on.

(3) abnormal blade and abnormal color.

The leaves appear swelling, gall tumor, protuberance, curl and so on, which are often caused by some fungi or gall aphids and mites. Some viruses can also cause leaf deformities or mosaics. Tumor can also occur on the leaf surface damaged by some bees. Virus infection or lack of some trace elements can cause chlorosis, macula, ring pattern, mottle, reticulation, mass spot, chlorosis and so on.

(4) White powder layer appeared on leaves, shoots, floral organs and fruits.

In the later stage, there are small black spots in the powdery mildew layer, which is powdery mildew caused by powdery mildew. Crape myrtle infected with powdery mildew is shown in figure 2, and there is a powdery mildew layer on the back of the leaf.

(5) Leaf defect

It is often the result of leaf-eating pests, and leaves suffering from sunburn, freezing injury, as well as hail, strong wind damage can also cause leaf defects.

(6) the shoot of the plant died or the whole plant died

Pests such as cicadas and branch blight can cause branches and shoots to die; root diseases and serious cadre cortical rot and ulcers as well as nematode diseases can lead to the death of the whole plant.

The above are the identification methods of flower diseases and insect pests compiled by Huinong net Xiaobian. Have you learned all these?

Control methods of flower diseases and insect pests in winter overwintering and cold prevention techniques of courtyard flowers

Winter flower diseases and insect pests are generally less in winter, but there will also be some diseases and insect pests in rooms with heating or higher temperature, which not only affect the healthy growth of flowers, but also affect the ornamental price, so we must pay attention to the prevention and control of diseases and insect pests. In general, families mainly focus on prevention, maintaining appropriate temperature and humidity, good indoor ventilation, suitable dry and wet soil, disinfection of soil when sowing, selection of strong seeds or introduction of flowers and seedlings without diseases and insect pests, and so on. these are effective measures to prevent diseases and insect pests.

The common diseases are powdery mildew, anthrax, root rot, rust, root nodule, leaf spot, leaf spot, chlorosis and so on. Diseases may occur in the whole growing period of flowers, but the high temperature and rainy season from June to August are the most common, and a few diseases and insect pests also occur in winter.

Overwintering cold protection of courtyard flowers: some families with courtyards like to grow flowers in the courtyard, but some varieties introduced from the south have poor cold tolerance and have the problem of overwintering cold prevention.

Generally speaking, the 2012 grass flowers, perennial root flowers and some flowers and plants cultivated in the open field have strong adaptability, such as chrysanthemum, peony, begonia, rose and so on. However, some flowers, such as dahlia, canna, Michelia, plantain, sweet-scented osmanthus, etc., have a certain ability to protect themselves from cold, but they are not resistant to low temperature. In the area north of the Yangtze River, protection still needs to be strengthened in winter to ensure that flowers survive the winter safely. The following methods are often used to protect flowers from cold in the open field:

Species I, carefully managed to enhance the cold resistance of flowers themselves: when autumn comes and the weather gets cooler, flowers enter the later stage of human growth, at this time, it is necessary to control the application of nitrogen fertilizer, apply more phosphorus fertilizer and potassium fertilizer, and control watering at the same time, so as to enrich the growth of plants and enhance their resistance to cold. After entering the dormant period in winter, one time of ploughing and fertilization can be applied, and barnyard manure, manure or cake fertilizer can be applied to increase the concentration of soil solution and enhance the cold protection ability of flowers in open field.

Some perennial flowers and perennial flowers, such as peony, canna, dahlia, tulips, incense and so on, are prone to frost injury in the north of the Huaihe River. In case of a cold spell, the flower rhizosphere can be covered with fallen leaves, straw, straw mats or plastic film. This method is simple, effective and widely used, and can be removed after night frost.

The second kind, cultivate the soil, winter anti-freezing: some flowers in winter, the ground part of all dormancy, only the roots are still growing slowly, such as peony, eight immortal flowers, hibiscus and so on. Soil can be cultivated around the roots of flowers to form a small mound. When the plants begin to sprout in spring. The soil can be removed.

The third kind, bandaging thermal insulation materials to prevent cold overwintering: for some large ornamental flowers and trees, because the trees are too large to be buried or covered, they can be protected by covering grass, wrapping paper and covering plastic film. For some flowers and trees with strong cold tolerance and fear of cold wind or newly planted flowers and trees, the method of setting up wind barriers can be adopted, that is, Reed mats and other materials are used to set up wind barriers on the west and north sides of flowers and trees. This method is often used to protect against cold when planting cedar in the north of Huaihe River.

Ecological Control methods of Flower Diseases and insect pests

Diseases and insect pests occur in flowers in the family, if pesticides are used for prevention and control, it is easy to pollute the environment, and if drugs are not used properly, it will also cause drug damage. Here are several pest control methods that are easy to use in the family, low cost and low pollution.

Plant ash with 500 grams of plant ash to 2.5 kg of water, soaked for one day and night to filter out impurities, spray the damaged plants with filtrate, can effectively kill aphids.

When the flowers and trees in the ammonia courtyard are harmed by stem borers such as longicorn beetles, gibbons and bark moths, the larvae or pupae can be killed by injecting 20% ammonia 20 to 30 milliliters from the upper hole of the insect path during the larval incubation period, before adult Eclosion and when the larvae are overwintering, and then sealed with clay or wax for 30 to 40 minutes.

Iodine wine if the trunk of woody flowers is rotten, all the rotten parts can be scraped off, reaching to the xylem, and then smeared with iodine, and then daubed again every 7 to 10 days, not only can be completely cured, but also for a long time, the trunk spot is prominent, showing more ancient peculiarities and unique fun.

After liquor was mixed with clear water at the ratio of 1 ∶ 5, it was applied to the parts damaged by shell insects and aphids, once a week for 3 to 4 times in a row.