What if sweet-scented osmanthus does not blossom if it is not fragrant in control of diseases and insect pests?

We see sweet-scented osmanthus usually in the community, when passing by can smell, rarely see sweet-scented osmanthus trees, sweet-scented osmanthus is also to grow insects, to get sick, sweet-scented osmanthus diseases and insect pests how to control? Why don't the potted plants raised at home blossom and smell good?

Disease and pest control of sweet-scented osmanthus:

1. Brown spot

There are small yellow spots on the leaves, which slowly become a large grayish brown. Generally, the disease occurs from April to October, and the old leaves are easy to get sick.

Remove the diseased leaves in time and spray chlorothalonil!

2. Blight spot

There are brown dots on the leaves, which slowly turn dark brown. It is easy to get sick with high temperature and humidity and poor ventilation.

3. Anthrax

There are small gray-green spots on the leaves, which gradually become serious, and the wet environment is easy to get sick!

Prevention and treatment: Osmanthus fragrans should remove diseased leaves in time, maintain them with ventilation, see more light, and build weak and dense branches properly.

Flower friends who spray can choose Bordeaux solution, carbendazim and benzoate for their own consideration, and basin soil and seedlings can be soaked in potassium permanganate before planting.

Pest control:

General prevention and control of red spiders is almost enough, see spray mite clear, aphid mite kill, leaves are sprayed on both sides, once a week, 2-3 times in a row.

Does potted sweet-scented osmanthus blossom?

Lack of light, lack of fertilizer, too much watering, alkali pot soil or smoke pollution, these reasons will cause your sweet-scented osmanthus not to blossom!

Is the sweet-scented osmanthus in bloom?

What should be planted is four seasons cinnamon, it blossoms all year round, but it is not fragrant! Breed reason!

So much for the disease and pest control of sweet-scented osmanthus and the problems encountered during the flowering period. Come and raise a pot of sweet-scented osmanthus to blossom and return fragrance. And healthy.

What about the growing insects of sweet-scented osmanthus in potted plants? control of diseases and insect pests of sweet-scented osmanthus (spraying for different diseases and insect pests)

Insects can grow in any plant, and sweet-scented osmanthus is no exception. With the progress of pot technology, sweet-scented osmanthus can also be raised at home. Sweet-scented osmanthus is one of the flower plants that can easily grow insects, so what about sweet-scented osmanthus worms? There are many kinds of insect pests in sweet-scented osmanthus, and each kind of prevention and control methods will be different. Let's take a look at sweet-scented osmanthus pest control with Xiaobian.

What about the long insects of potted sweet-scented osmanthus? spraying to kill insects

Any flower plant may be harmed by diseases and insect pests. Potted sweet-scented osmanthus is naturally inseparable from the problem of growing insects. What about potted sweet-scented osmanthus worms? Do not panic, first of all to see what kind of insects your sweet-scented osmanthus grow, common pests are scale insects, whitefly, red spiders and so on, for different pests spraying agents are not the same, let's talk about sweet-scented osmanthus pest control one by one.

2. prevention and control of diseases and insect pests of sweet-scented osmanthus

1. Scale insects

The adult is 5-7 mm long, the female is oval, orange-red, the ventral surface is flat, the back is raised, and secretes white oocysts at the back of the abdomen before spawning. The male has a thin abdomen, about 3 mm long, a black chest and an orange abdomen. Most of the female adults are fixed in one place and secrete white waxy oocysts at the end of the abdomen. the oviposition period lasts for more than 30 days, and each female can lay hundreds to 2000 eggs. After hatching, the larvae disperse their activities, then transfer from the tender shoots and the back of the leaves to the social harm on the branches, absorb the tree sap, and excrete honeydew, causing coal fouling disease. Due to the cross-harm of diseases, it often leads to yellowing leaves and wilting branches of sweet-scented osmanthus.

Prevention and control methods: usually use fewer pesticides to protect natural enemies. If you find a small amount of worms, wipe them off and squeeze them to death in time. The overwintering pests were killed by spraying 0. 3-0. 5 Baomei stone sulfur mixture in winter, and the eggs were sprayed with 1000 times of the final medium, or 1000 times of the scale clear liquid, or with the frenzied scale liquid.

2. Whitefly

The main whitefly pests that harm sweet-scented osmanthus are white whitefly, black whitefly, orange whitefly and so on. they mainly use the mouthparts of adults and larvae to pierce the mesophyll on the back of the leaves to absorb juice, making sweet-scented osmanthus leaves curly, chlorotic and yellow, and even withered. A large amount of honeydew excreted by it will seriously pollute the branches and leaves of sweet-scented osmanthus, and can cause coal pollution, resulting in poor growth of sweet-scented osmanthus, thus affecting the normal flowering and display of sweet-scented osmanthus plants.

Control methods: whitefly has strong drug resistance, so when selecting pesticides for control, we should pay attention to the principle of alternating use and mixed use. for example, 1000 times of liquid can be used, 2000 times of imidacloprid wettable powder, 1500 times of omethoate EC, 1000 times of aphid and so on.

3. Red spider

Red spider, commonly known as fire dragon, is one of the most common pests of sweet-scented osmanthus. Its individual is very small, less than 1 mm long, round or oval, orange or reddish brown. We should try our best to defend against red spiders, so the cultivation environment must be ventilated and the humidity is suitable to avoid dryness and muggy heat as far as possible.

Prevention and control method: how to do the long worm of sweet-scented osmanthus? In dry weather, attention should be paid to irrigation and combined with fertilization to promote plant health and enhance insect resistance. In the application of chemical pesticides, we should pay attention to frequent rotation, because it will produce resistance after the application of certain highly toxic pesticides. It can be sprayed with 1000 times of mite or 1500 times of dimethoate EC, and the control effect is good.

4. Cinnabar spider mite

The adult mites of cinnabar spider mites are 0.5-0.6 mm long, female mites are oval, scarlet to rust red, or dark brown to dark brown; male mites are slightly rhomboid, yellowish, slightly smaller, 0.3-0.4 mm long. High temperature and drought season is most conducive to its occurrence, resulting in the whole plant or a piece of sweet-scented osmanthus forest leaves gray, seriously affecting the growth, flowering and display of sweet-scented osmanthus.

Control methods: protect natural enemies, such as small black ladybug, small flower bug, thrips, Chinese lacewings, large lacewings, etc.; remove weeds under trees and burn them in winter, and kill overwintering adult mites, nymphs and eggs with 0. 3-0. 5 Bomedo stone sulfur mixture; mite 1000 times or Avidaben 800 times. What about the long worm of sweet-scented osmanthus? now do you know? let's take a look at its disease control.

III. Disease prevention of sweet-scented osmanthus

1. Brown spot

In the early stage of the disease, small yellow spots appeared on the leaves, which gradually expanded into a circle with a diameter of between two millimeters and ten millimeters. The disease spot is yellowish brown to taupe, and there is a yellow halo outside the spot. Generally speaking, it is a frequent season from April to October every year.

2. Blight spot

Leaf blight often invades from the leaf edge and leaf tip, and occurs at the leaf edge and leaf tip. In the early stage of the disease, sweet-scented osmanthus leaves will have light brown dots, gradually expand into round or irregular disease spots, the edge is dark brown. Most of them occur between July and November.

3. Carbon mycosis

Sweet-scented osmanthus anthracnose the disease infects sweet-scented osmanthus leaves. In the early stage of the disease, small chlorotic spots appeared on the leaves of sweet-scented osmanthus, which gradually expanded to form round, semicircular or oval spots. The disease spot is light brown to grayish white, with reddish-brown rings on the edge. Under moist conditions, a pink myxospore disk appears on the spot. Anthrax occurs from April to June. The above is how to do sweet-scented osmanthus worms, sweet-scented osmanthus diseases and insect pests control methods, let's take a look at the treatment of diseases.

Control methods of sweet-scented osmanthus diseases:

1. The prevention and control of the following diseases should first reduce the source of infection. If the diseased leaves are thoroughly removed in autumn, the potted sweet-scented osmanthus should remove the diseased leaves in time.

2. Strengthen the management of sweet-scented osmanthus trees. Select fertile and well-drained soil or substrate to plant sweet-scented osmanthus; increase the application of organic fertilizer and potassium fertilizer; planting density should be suitable for ventilation and light transmission, reduce leaf humidity and reduce the occurrence of diseases.

3. Spray 200 times Bordeaux solution at the initial stage of the disease, and then spray 50% carbendazim wettable powder 1000 times or 50% benzoate wettable powder 1000 to 1500 times.

4. Soak and disinfect the seedlings with 1000 times potassium permanganate solution when they come out of the nursery in the severe disease area. The above is for you to bring sweet-scented osmanthus pest control, potted sweet-scented osmanthus worms how to do, I hope to help you.

Classification of Osmanthus fragrans Control of Diseases and insect pests of Osmanthus fragrans

The fragrance of sweet-scented osmanthus is rich and attractive, so it is an ideal flower for indoor breeding. And now the sweet-scented osmanthus has been artificially cultivated, forming a lot of varieties for everyone to choose from. However, potted sweet-scented osmanthus flowers often bloom rarely or do not bloom for a long time, so we need to pay more attention to the threat of diseases and insect pests. The following is about the classification of sweet-scented osmanthus and the prevention and control of sweet-scented osmanthus diseases and insect pests.

Classification of Osmanthus fragrans

Sweet-scented osmanthus has formed a rich variety of cultivated varieties due to long artificial cultivation, natural hybridization and artificial selection. Based on the extensive investigation of sweet-scented osmanthus resources and varieties in major cities in China, the flowering characters of sweet-scented osmanthus were recorded on the spot, the characters of various types of sweet-scented osmanthus were analyzed and compared, and the more stable genetic characters were selected. four variety groups of sweet-scented osmanthus were identified by traditional classification and application in garden production.

1. Four Seasons Cassia population

The variety is bushy, low in tree shape, short and dense in branches and round in crown. The new leaves are dark red, the old mature leaves are green or yellowish green; the leaves are oval in shape, entire or sparsely serrated, and the leaf margin is undulate; the quality of the leaf is thin, the mesophyll of the leaf surface is slightly raised, and the reticulate vein is more obvious. The average length of petiole is about 1 cm. The important feature is that the intersection angle between the main vein and the lateral vein of the leaf is very large, close to the vertical state.

The flower buds of Cinnamomum chinense are often solitary or 2-3 superimposed, blooming in batches from September to March every year. The flower color is lighter, it is milky yellow to lemon yellow, the flower fragrance is not as strong as silver cinnamon, cinnamon and cinnamon, and the varieties are big leaf cinnamon and leaflet cinnamon. The four seasons bloom, there are "laurel", "Japanese cinnamon", "big leaf Buddha top bead", "tooth leaf four seasons cinnamon" and other varieties.

2. Danguipin population

Evergreen shrub having a dioecious crown and a spherical crown. The bark is light gray and smooth, with sparse lenticels. Leaves leathery, long elliptic or elliptic, 6-12 cm long and 2.5-5 cm wide; leaf surface smooth, margin revolute, entire, apex occasionally sparsely toothed, base broadly cuneate; apex obtuse or mucronate; lateral veins 8-10 pairs, reticulate veins conspicuous on both sides; petiole 8-10 mm long. The flower color is orange and red, the Corolla is slightly buckled inside, and the fragrance is light.

Flowering period from late September to early October. Autumn flowering, dark flowers, orange, orange to scarlet, strong smell, thick leaves, there are "big flower cinnamon", "tooth cinnamon", "cinnamon cinnamon", "broad leaf red" and other varieties.

3. Jinguipin population

Small evergreen tree with a spherical crown; strong, tall and straight branches, very close. The bark is gray, the lenticels are round or oval, the spring shoots are stout, with an average length of 15.9 cm; the leaves are dark green, leathery and glossy; the leaves are oval, uneven, microwave curled, anti-curling is obvious; entire, even apex is serrated; flowers are yellow, fragrant, not sturdy.

It blossoms in autumn and the lemon is yellow to golden. The varieties are "Dahua Jingui", "Dayehuang", "Huangchuan Jingui", "late Jingui", "Yuanye Jingui", Xianning late Gui, Qiangui, Yuanjian Jingui, Liu Ye Sugui, Jin Shigui, Boye Jingui, and other varieties.

4. Yinguipin population

Small evergreen trees with round crowns, large branches spreading, dense branches and leaves, growing well. Bark light gray, lenticels are many and large, shaped like snowflakes, very obvious. The average length of spring shoot is 15.5cm, and the new shoot is brown-red, which is very eye-catching. Leaves green or dark green, thick leathery, glossy; long oval or oval; leaves broad and thick; leaf surface more flat; leaf margin shallowly wavy, anti-curly, entire, even apex sparsely toothed; flowering in the first and middle of September, Corolla obliquely spreading, lobes ovoid, creamy to lemon yellow in color, rich aroma; not fruiting after anthesis.

It blossoms in autumn with pure white, milky white, yellowish white or light yellow. The varieties include broad-leaf seed silver cinnamon, willow leaf silver cinnamon, hard leaf silver cinnamon, "seed silver cinnamon", "Jiulong cinnamon", "early silver cinnamon", "evening silver cinnamon", "Baijie", "pure white cinnamon", "Qingshan silver cinnamon" and so on.

Control of Diseases and insect pests of Osmanthus fragrans

Sweet-scented osmanthus brown spot, sweet-scented osmanthus blight and sweet-scented osmanthus anthracnose are common leaf diseases of sweet-scented osmanthus. These diseases can cause early defoliation, weaken plant growth and reduce flower yield and ornamental value of sweet-scented osmanthus.

1. Brown spot

In the early stage of the disease, chlorotic small yellow spots appeared on the leaves, which gradually expanded into near-round spots, with a diameter of 2-10mm, or irregular spots due to the limitation of leaf veins. The disease spot is yellowish brown to grayish brown with a yellow halo on the periphery of the spot. Brown spot usually occurs from April to October, and old leaves are more susceptible to the disease than young ones. The pathogen overwintered on the diseased fallen leaves with hyphae and produced conidia for primary infection in the following spring. The conidia were transmitted by airflow and raindrops.

2. Blight spot

The pathogen of the disease mostly invaded from the leaf edge and leaf tip, and occurred at the leaf edge and leaf tip. In the early stage of the disease, light brown dots appeared on the leaves, which gradually expanded into round or irregular plaques, and then expanded into near round or irregular grayish brown spots, with dark brown edges. Blight occurs from July to November and can occur all year round in greenhouses with poor environmental conditions. The pathogen is infected by conidia through wind and water. The environment of high temperature, high humidity and poor ventilation is beneficial to the disease. The disease was more serious in the old leaves and lower leaves of the plant during the weakening of plant growth and after overwintering.

3. Anthrax

The disease infects sweet-scented osmanthus leaves. At the initial stage of the disease, small chlorotic spots appeared on the leaves, and gradually enlarged to form round, semicircular or oval spots. The disease spot is light brown to grayish white, with reddish-brown rings on the edge. Under moist conditions, a pink myxospore disk appears on the spot. Anthrax occurs from April to June. The pathogen overwintered in diseased leaves with conidia and was transmitted by wind and rain.

4. Prevention and control measures

First of all, the source of infection should be reduced. Thoroughly remove the diseased leaves in autumn. Potted sweet-scented osmanthus should remove the diseased leaves in time.

Secondly, strengthen the cultivation management. Select fertile and well-drained soil or substrate to plant sweet-scented osmanthus; increase the application of organic fertilizer and potassium fertilizer; planting density should be suitable for ventilation and light transmission, reduce leaf humidity and reduce the occurrence of diseases.

Scientific use of chemicals for prevention and control. At the initial stage of the disease, spray 1V 2v 200 times Bordeaux liquid, and then spray 50% carbendazim wettable powder 1000 times or 50% benzoate wettable powder 1000-1500 times.

The serious disease area should be soaked and disinfected with 1000 times potassium permanganate solution when the seedlings came out of the nursery.

5. Pest control

The main pest of family breeding sweet-scented osmanthus is mites, commonly known as red spiders. Once the disease is found, it should be disposed of immediately, and foliar spray can be carried out with mite, aphid and triazoltin. Spray both sides of the blade evenly. Once a week, 2-3 times in a row, can be cured.