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.

What about potted lavender worms? lavender pest control (spraying insecticide)

Lavender is a common flower plant in daily life. Any plant in nature may grow insects, and lavender is no exception. Lavender has gradually developed into a potted plant, and many people do not know what to do with lavender worms. In fact, there are many reasons for the growth of lavender insects, the most common is the red spider this pest, let's take a look at lavender pest control.

What about lavender worms? spraying to kill insects

The unique fragrance of lavender is deeply loved by people. Its flower language is waiting for love. Lavender is one of the favorite flowers for young people. Earlier we talked about how to raise lavender and when lavender will bloom. Now let's talk about one of the most common questions: what to do with lavender worms. There are several common pests of lavender, different pests, prevention methods are also different, the following for you to introduce lavender pest control.

II. Disease and pest control of lavender

1. Red spider

Red spider, commonly known as fire dragon, is one of the most common pests of lavender. 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.

Solution: 40% omethoate 1500 times liquid and 40% dicofol 1000 times liquid. Spray for 1-2 weeks in summer, and thoroughly before overwintering.

2. Scale insects

Shell insects, so flowers hate one of the insects, lavender long worm may be it. It is understood that the insect often swarms on branches, leaves and fruits. The mouthparts of adults and nymphs are inserted into the leaves and branches of flowers to absorb juice, resulting in the symptoms of branch and leaf wilting and deformity, and coal fouling disease.

Solution: when there are few scale insects, gently brush off with a soft brush or wipe off with cotton balls and towel gourd stems. For this kind of lavender pest control, 40% omethoate, 50% malathion and 80% dichlorvos EC 800 / 1000 times can be sprayed every 7 to 10 days for 2 times in a row, which can effectively prevent the damage of scale insects.

3. Leaf mite

Leaf mites mainly harm the leaves of lavender, prickling and sucking juice, making the leaves green, withering and yellow rust spots, resulting in lavender can not blossom and heading normally. The peak period of spider mite damage is from July to August, during which drip irrigation should be timely to regulate farmland microclimate, which can effectively restrain the harm of spider mites. In biological control, the first is to protect natural enemies, the main natural enemies of leaf mites are lacewings, mite-eating ladybugs, six-spot thrips and predatory mites.

Solution: at the initial stage of the occurrence of spider mites, 0.26% matrine was sprayed evenly with 1000 times of matrine; when occurring in a large area, 20% diclofenac EC was sprayed evenly with 1000 × 2000 times, or 1.8% avermectin EC was sprayed evenly, which could effectively reduce the population number of spider mites and had a good control effect. I believe everyone knows what to do with lavender worms. Let's take a look at the prevention of lavender diseases.

III. Prevention of lavender diseases

1. Lavender root rot

Symptom: this is a root disease. In spring, the lavender seedlings do not turn green or turn green, then dry up and die one after another, and a large number of vascular bundle necrosis can be seen at the roots of the diseased plants; or the susceptible plants can still turn green normally in spring, and the bouquet wilts from the bud to the early stage of flowering. and then start falling flowers until they all fall off. Some branches can still germinate new buds normally in autumn, and a large number of vascular bundle necrosis can also be seen in the rhizome of the plant.

Solution: in chemical control, after pier opening in spring, before burying soil in autumn and at the initial stage of the disease, 70% methyl thiophanate wettable powder 400 times or 50% carbendazim wettable powder 500 times solution can be sprayed on the leaves.

2. Leaf spot

The symptoms of annual sowing and cutting seedlings are wilting, dehydration, dim color, curved branches, withered roots and rotting, and brown stem ducts. In addition to the above symptoms, the seedlings of more than three years old also showed wilting symptoms extending from the inside to the outside in the center or edge of the plant, and the branches withered and died until the whole plant died.

Solution: spray Bordeaux solution for 2 times or 200 Bordeaux solution for 3 times, or Dyson zinc 500 times for 800 times. The above is for you to bring lavender pest control, potted lavender worms how to do all the content, I hope to help you.

What about the growing insects of potted lotus flowers? control of lotus diseases and insect pests / cutting withered leaves and spraying insecticides to kill insects

Insects can grow in any plant in nature, and lotus is no exception. Lotus is one of the top ten famous flowers in China. Lotus is very popular without being stained with mud. Now many families have raised lotus flowers, but they don't know what to do with lotus bugs. Let's take a look at lotus pest control with Xiaobian.

What about the lotus bugs? spray to kill the insects

Lotus is one of the top ten famous flowers in China. With the progress of pot technology, many people have raised lotus at home. What to do with lotus bugs is the most common problem. Common lotus pests are aphids, water maggots, caterpillars, Spodoptera litura and so on. Different pest control methods will be different. Let's take a look at lotus pest control with Xiaobian.

2. prevention and control of lotus diseases and insect pests

1. Aphids

Aphids generally began to harm the floating leaves and small standing leaves of lotus in early May, often concentrated on leaf buds, buds and leaf backs, larvae and adults sucked juice, especially in late spring and autumn. Prevention and treatment: 20% fenvalerate 2000 times solution can be used.

2. Spodoptera litura and Plutella xylostella

Spodoptera litura and Spodoptera litura are commonly known as Caterpillar, which mainly harms the standing leaves by larvae, generally from mid-June to September. Control method: remove the insect leaves and burn them. Spray with 90% trichlorfon 800 to 1000 liquid, or 2.5% enemy kill 3000 times solution.

3. Water maggots

The larvae suck the juice on the stem nodes and roots of the lotus, causing the diseased leaves to turn yellow. Prevention and control methods: lime can be used to drive and kill. Sprinkle 1015kg per 667 square meters (1 mu), but not too much.

4. Spodoptera litura

The main harm to standing leaves, when serious, the back of the lotus leaves can hang 20 or 30, they will eat the new and old lotus leaves riddled with holes, or even all eaten up.

Prevention and treatment: artificial capture can be used to remove the diseased leaves in time. Spray and kill with 1 500-2000 times of trichlorfon and 800 times of trichlorfon. Remove the weeds on the edge of the lotus root field, and carry out disinfection treatment, lotus disease and insect pest control we continue to look down.

5. Spodoptera litura

Also known as lotus armyworm, twill burglar. The first egg larvae gather to gnaw on the back of the leaves, leaving only the upper epidermis and veins, and the injured leaves are like screens. Disperse the harm after 3 years old, eat the leaves into lacerations, often eat up the leaves, and even bite the young stems. When a large occurrence occurs, the larvae can migrate to the adjacent fields in groups after eating up a field.

Prevention and control methods: domestic B.T emulsion or cyanobacteria No. 6 liquid 500 times 800 times were sprayed. Phoxim 50% EC 1000 times, or deltamethrin 2.5% EC 3000 times, or 21% germicidal EC 4000 times. Through the above introduction, now you know what to do with lotus bugs. Let's take a look at the prevention and control of lotus diseases.

III. Control of lotus diseases

1. Black spot

In the early stage of the disease, chlorotic yellow spots appear on the leaves, and in the later stage, they are round or irregular, turn brown and have wheel lines, sometimes with yellowish-green halos on the edges, and upper black mildew layers with a diameter of 5-15 mm. In severe cases, the disease spot is connected into a piece, and the whole leaf is withered and yellow except for the veins. The disease is caused by fungi, serious in rainy season, continuous cropping in lotus ponds or pots, excessive application of nitrogen fertilizer or high water temperature in summer, the disease is very serious.

Prevention and control methods: strengthen cultivation management and remove diseased leaves in time. Plants with serious disease should be replanted in new soil without partial application of nitrogen fertilizer. When the disease occurs, 75% chlorothalonil 600 times 800 times solution can be sprayed for prevention and control.

2. Rot disease

It mainly harms leaves, pedicels and lotus roots. When the leaves are damaged, the green and withered patches are produced along the leaf edge at first. Soon the spot spread into the leaf, and finally the whole leaf turned brown and necrotic. When the pedicel occurs, it turns brown and sunken along the stomatal line. Lotus root disease, first brown, gradually turn to whip node, longitudinal necrosis, but also can see the diseased lotus root node grow white filamentous or pink pile. The disease is usually more serious under continuous cropping and when the soil is poor, and it is also easy to occur if the leaves are often flooded.

Prevention and control methods: appropriate fertilization, pay attention to the water surface should not be too high, so as not to soak the leaves and lead to the disease. It is found that when black spots appear on the leaves, the diseased leaves should be removed as soon as possible, but the connection between the leaves and the petiole should be retained to prevent Rain Water from invading the body from the petiole wound. Spray 50% carbendazim 500 times solution, or 50% Phytophthora Jing 500 times solution for control.

3. Brown spot

It mainly harms the lotus leaves. Round spots with a diameter of 0.5 mm to 8 mm appeared on the diseased leaves, showing light brown to yellowish brown, with dark edges. In the later stage of the disease, there were many black mildew spots on the disease spot. The disease is more serious when it is rainy in autumn. Most of the germs overwintered on the remains.

Prevention and treatment: remove the residual leaves and reduce the source of the disease. If the disease is serious, 50% carbendazim 500 times can be sprayed, or 80% Dysen zinc 500 times 800 times can be used for prevention and treatment. The above is the lotus pest control, lotus long insect how to do all the content, I hope to help you.