Analysis of insect pests easily suffered by common flowers

Many people like to raise some flowers and plants indoors, which not only greens the environment but also edifies interest. But flowers and plants are not only a little delicate, but also easily "favored" by some bugs, which is annoying and helpless. Next, we will introduce several common pests of flowers and plants and their control methods.

Chrysanthemum (details)

Chrysanthemums are easy to attract aphids

Aphids, mostly green and black, are good at flying, tube-shaped and flea-like. It likes chrysanthemums, bauhinia, roses, roses and other flowers. Often cluster in the tender tips of flowers, flowers and leaf back, absorb juice, make leaves wrinkle, affect flowering. Generally speaking, insect pests begin to be more obvious in the middle of April.

Countermeasures: when sporadic aphids appear, brush them off with a brush dipped in water, and the aphids under the brush should be dealt with in time to prevent spread. You can also add 1 kg of water to 40 grams of tobacco, filter the original solution after soaking for 48 hours, dilute it with 1 kg of water, add 2 grams of washing powder or a little soap, stir well and spray the plant. Using physical methods, you can use cardboard or plastic board coated with yellow and glue to trap and kill aphids, or use silver tin foil to reflect light to drive away aphids.

Jasmine beware of red spiders

Red spider is Obovate, the back and abdomen are flat, there are red, dark red, orange red and so on. Orchids, jasmine and kumquat are easy to recruit red spiders. It is often hidden on the back of the leaves and buds of flowers, causing the leaves to lose green and wither, the buds to wither, and in severe cases, the plants will wither and die. In general, insect pests are more serious from June to July.

Countermeasures: soak the orange peel with 10 times water for one day and night, filter and spray the plant once every day for 3 consecutive days. In addition, a plate of mosquito-repellent incense can be lit and placed in a flowerpot, and then tied tightly with a plastic bag. After 1 hour of smoking, both eggs and adults can be killed. This is a good way to save money and get quick results.

Third, the rose is far away from the yellow moth.

The head of the larva is yellowish brown, the chest is yellowish green, and there is a pair of thorns on each side of the dorsal line. More common in camellias, bauhinia, rose, West House Begonia, and so on, often eat up the leaves of flowers.

Countermeasures: yellow thorn moth likes light, has a strong phototaxis, and can be trapped and killed by a lamp next to the flower.

In addition, brown and pointed insects of plants such as anthurium and cyclamen are often "attacked", as well as mosquito-like mosquitoes and flies that love to grow in poinsettias and pansy, which can be sprayed with garlic juice, pepper water and pepper water at the initial stage.

Prevention and control of common diseases and insect pests in flowers

The more serious damage in May are the following: aphids (greasy insects) hibiscus, green peach, mulberry, rose, honeysuckle and so on are vulnerable to aphids. With the increase of temperature, it becomes more and more serious. It must be detected and prevented in advance.

Control methods: ① sprays 40% omethoate or 50% imidophos, 1200-1500 times water; a small amount of potted flowers in ② can also spray 70 Mel 100 times neutral detergent

Most of the red spiders on many flowers, such as 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 can often wash 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.

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

Control methods: ① gently brushed off the worm body manually before hatching; ② checked frequently and sprayed 1000Mel 1500 times liquid during the nymph incubation period.

When the temperature is more than 20 degrees Celsius, flowers, tree seedlings and some flowers with rotten roots newly sown or sown in autumn, if the soil humidity is high, the blight disease is very easy to occur. Control methods: before ① sowing, the soil is evenly mixed with 70% pentachloronitrobenzene 3-8 jin per mu. ② controls watering in the young stage of seedlings, so as not to make the soil too wet. When ③ first found diseased seedlings, 1% ferrous sulfate or 200-400 times 50% Dysenamine solution were irrigated with 4-8 jin per square meter.

Rust begonia rust is easy to infect a large number after the rain in April and May: rose rust is infected when roses are budding; prevention and control methods: ① rose disease in time to sprout the first yellow disease buds removed and burned to eliminate the source of infection; ② sprayed 15% of trimethoprim in the initial infection period, mixed with water 700-1000 letters, the effect is obvious.

Powdery mildew of rose, impatiens and yellow mildew are mostly infected in May and June, and are easy to cause symptoms such as yellow leaves, withered leaves and twisted shoots in summer. Control methods: ① should pay attention to the ventilation and light transmission of flowers; ② should apply less nitrogen fertilizer and more phosphorus and potassium fertilizer; ③ spray 15% trimethoprim once in the initial infection period and mix it with water 700-1000 times

There are many kinds of common diseases and insect pests in flowers in autumn, and the occurrence and growth and decline rules of diseases and insect pests are different. According to a recent investigation, the main flower diseases and insect pests in our city are: leaf spot, black spot, anthrax, Fusarium wilt, powdery mildew, scale insects, aphids, thrips, longicorn beetles, wood bark moths, whiteflies, Liriomyza huidobrensis, mites (red spiders, tarsal mites), nematodes and so on. Leaf spot is mainly harmful to camellia, sweet-scented osmanthus, elm, orchid, pineapple, Luohansong, sunflower and so on. The general rate of diseased leaves is 15%, and the heavy one is more than 50%. Black spot rose, rose, chrysanthemum and other flowers suffer more commonly, with a general damage rate of 20%.

Anthrax causes serious damage to many kinds of flowers, including orchids, evergreen, camellias, Milan, Jiuli incense, rubber trees, white orchids, gentleman orchids, taros, palms and so on. The injury rate of flower leaves is 10%, 30%, and more than 90% seriously. In addition, powdery mildew is harmful to crape myrtle, peony, etc., and Fusarium wilt is harmful to palms (seedling) flowers, chrysanthemums and so on. Scale insect is a common pest. Often harmful to cycads, sunflower, Magnolia, sweet-scented osmanthus, camellias, Michelia, Jiuli incense, banyan, elm, Fujian tea, palm bamboo and so on. Heavy occurrence occurs in the environment of high planting density and high shade, and the prevention and control is not timely, which often results in fallen leaves, withered branches, and even plant death. Mites (red spider, tarsal mite) there are many kinds of mites that harm flowers, such as citrus, elm, marigold, rose, rose, cycad, bamboo and so on. Autumn is the peak of mite damage, so corresponding pesticides must be used for timely control. Secondly, thrips are often harmful to fine-leaf banyan, etc.; longicorn beetles and bark moths are harmful to the thick branches of banyan trees, imitation umbrella maple, cycads, etc., with a general damage rate of 10%, 40%; whitefly, aphids, Liriomyza huidobrensis mainly damage flowers such as chrysanthemum, peony, rhododendron, etc. The occurrence of nematodes is more common and is not easy to be found. the main targets are: evergreen, palms, chrysanthemums, and even tall trees how to imitate umbrella maple and so on, resulting in rotting of roots and stems of flowers and trees. Nematodes are also often damaged by Fusarium oxysporum, causing the occurrence and spread of serious Fusarium wilt. Prevention and control suggestions: prevention of flower diseases and insect pests should give priority to prevention and reduce repeated infection in the garden as much as possible, especially how to avoid the epidemic of diseases caused by polluted water sources. In addition, we must prescribe the right medicine to the case and prevent it in time. 1. In the flower field, we should clean up the diseased and residual branches and leaves in time, use clean water to irrigate flowers, and reasonably arrange the planting layout of flower varieties in the field, so as to reduce the repeated infection and mutual spread of diseases and insect pests. 2. prescribe the right medicine to the case and apply medicine in time for prevention and treatment. Disease control: topiramate, carbendazim, mancozeb, copper oxychloride and other pesticides are used to control leaf spot and black spot; anthrax is protected, Baig or Dysen zinc is used; powdery mildew is used with aldicarb, glue suspension, trimethoprim and so on. Pest control: scale insects should choose quick culling and omethoate; mites use dacarine, propargite, diformamidine, etc.; imidacloprid, rice planthopper, Wanling, etc., for thrips and whitefly control; Liriomyza huidobrensis, Badan, etc.; nematodes use carbofuran and milol; in case of borer pests, in addition to spraying pesticides on the surface, pesticide perfusion and mixed nip can also be used.