What to do when potted lavender gets bugs? Spray pesticide to control pests and diseases

Lavender is a common flowering plant in daily life. Any plant in nature can get bugs, and lavender is no exception. Lavender has gradually developed into a potted plant, and many people do not know what to do when lavender gets bugs. In fact, there are many reasons why lavender gets bugs, and the most common one is the red spider mite pest. Below let us take a look at the prevention and control of lavender pests and diseases.

I. What to do when lavender gets bugs: spray pesticide to kill the insects

Lavender's unique floral fragrance is deeply loved by people. Its flower language is waiting for love, and lavender is one of the flowers most loved by young people. Earlier we talked about how to grow lavender and when lavender blooms. Now let us talk about a most common problem: what to do when lavender gets bugs. There are several common pests of lavender, and different pests require different control methods. Below we introduce the prevention and control of lavender pests and diseases one by one.

II. Prevention and control of lavender pests and diseases

1. Red spider mite

The red spider mite, commonly known as the fire dragon, is one of the most common pests of lavender. Its body is very small, less than 1 mm long, round or oval, orange-yellow or reddish-brown. Every effort should be made to defend against the red spider mite, so the cultivation environment must be ventilated and have suitable humidity, avoiding dryness and stuffiness as much as possible.

Solution: The pesticides for controlling it include 40% omethoate 1500-times dilution and 40% dicofol 1000-times dilution. In summer, spraying should be carried out on a cycle of 1-2 weeks, and a thorough spraying should be carried out before overwintering.

2. Scale insects

Scale insects are one of the insects that all flowering plants hate, and the bugs on lavender may be them. It is understood that these insects often gather in groups on branches, leaves and fruits. The mouthparts of adults and nymphs pierce into the leaf and branch tissues of flowering plants to suck sap, causing symptoms of withered and deformed branches and leaves, and inducing sooty mold, doing great harm.

Solution: When there are few scale insects, gently brush them off with a soft brush or wipe them off and clean them with cotton balls or loofah stems. For this kind of prevention and control of lavender pests and diseases, you can choose 40% omethoate, 50% malathion, or 80% dichlorvos emulsifiable concentrate at 800-1000-times dilution, spraying once every 7-10 days for 2-3 consecutive times, which can effectively prevent the harm of scale insects.

3. Leaf mites

Leaf mites mainly harm the leaves of lavender, piercing and sucking sap, making the leaves lose green, showing withered, dry and yellow rust spots, and causing lavender to be unable to bloom and head normally. The peak period of leaf mite damage is from July to August, during which timely drip irrigation should be carried out to regulate the field microclimate, which can effectively inhibit the harm of leaf mites. In biological control, first, protect natural enemies. The main natural enemies of leaf mites are green lacewings, predatory ladybirds that feed on mites, six-spotted thrips and predatory mites.

Solution: In the early stage of leaf mite occurrence, evenly spray 0.26% matrine at 1000-times dilution; when it occurs over a large area, evenly spray 20% dicofol emulsifiable concentrate at 1000-2000-times dilution, or 1.8% abamectin emulsifiable concentrate at 3000-4000-times dilution, which can effectively reduce the population base of leaf mites with good control effect. I believe everyone now knows what to do when lavender gets bugs. Below let us take a look at the prevention of lavender diseases.

III. Prevention of lavender diseases

1. Lavender root rot

Symptoms: This is a root disease. In spring, lavender seedlings do not turn green or turn green poorly, and then gradually dry up and die, and dissection of the roots of diseased plants shows extensive necrosis of vascular bundles; or infected plants can still turn green normally in spring, but the flower clusters wilt from the budding stage to the early flowering stage, and then flowers continuously drop until all fall off. In autumn, some branches can still sprout new buds normally, and dissection of the root and stem part of the plant also shows extensive necrosis of vascular bundles.

Solution: In chemical control, after removing the soil cover in spring, before earthing up in autumn, and in the early stage of disease onset, foliar spraying can be carried out with 70% thiophanate-methyl wettable powder at 400-times dilution or 50% carbendazim wettable powder at 500-times dilution.

2. Leaf spot disease

The symptoms of one-year-old seedling-grown and cutting-grown plants are wilting, water loss, dull color, curved branches, and in severe cases withered and rotted roots, with the stem vessels turning brown. For seedlings more than three years old, in addition to the above symptoms, wilting symptoms also appear, spreading from the center or edge of the plant from the inside outward, with branches wilting and dying until the whole plant dies.

Solution: Spray Bordeaux mixture at 1:200 for 2-3 preventive treatments, or zineb at 500-800-times dilution. The above is all the content brought to you on the prevention and control of lavender pests and diseases and what to do when potted lavender gets bugs. I hope it can help you.

What to do when potted osmanthus gets bugs, prevention and control of osmanthus pests and diseases (spray pesticide according to different pests and diseases)

Any plant can get bugs, and of course osmanthus is no exception. With the progress of potting techniques, osmanthus can also be grown at home. Osmanthus is one of the flowering plants that easily gets bugs, so what to do when osmanthus gets bugs? There are many kinds of pests on osmanthus, and the control methods for each are different. Below, follow the editor to take a look at the prevention and control of osmanthus pests and diseases.

I. What to do when potted osmanthus gets bugs: spray pesticide to kill the insects

Any flowering plant can be harmed by pests and diseases, and potted osmanthus naturally cannot avoid the problem of getting bugs. What to do when potted osmanthus gets bugs? Do not panic. First, look clearly at what kind of bugs your osmanthus has. Common pests include scale insects, whiteflies, red spider mites and so on. The pesticides sprayed for different pests are also different. Below we explain the prevention and control of osmanthus pests and diseases one by one.

II. Prevention and control of osmanthus pests and diseases

1. Scale insects

The adult female is 5-7 mm long, oval, orange-red, with a flat ventral surface and a raised back, and secretes a white egg sac behind the abdomen before laying eggs. The adult male has a small, slender entire abdomen, about 3 mm long, with a black thorax and orange-red abdomen. Most adult females gather and fix in one place, secreting a white waxy egg sac at the end of the abdomen. The egg-laying period lasts more than 30 days, and each female can lay hundreds to 2000 eggs. After hatching, the larvae move about separately, then migrate from tender shoots and leaf backs to branches and trunks to live in groups, sucking tree sap and excreting honeydew, inducing sooty mold. Because insects and diseases cause cross damage, osmanthus plants often suffer yellowing leaves and withered shoots.

Control method: Usually use less pesticide and protect natural enemies well. When a small number of insects are found, promptly wipe them off and crush them to death. In winter, spray lime sulfur mixture at 0.3-0.5 degrees Baume to kill overwintering pests; at the peak hatching period of eggs, spray with Zhongjie at 1000-times dilution, or Jieqing at 1000-times dilution, or Kuangshajie at 800-times dilution.

2. Whiteflies

The whitefly pests harming osmanthus mainly include whitefly, black whitefly, orange-yellow whitefly and so on. They mainly use the mouthparts of adults and larvae to pierce into the leaf flesh on the back of leaves and suck sap, making osmanthus leaves curl, lose green and turn yellow, and even dry up. The large amount of honeydew they excrete seriously pollutes the branches and leaves of osmanthus and can cause sooty mold, leading to poor growth of osmanthus, thereby affecting the normal flowering of the plant and its display and appreciation.

Control method: Whiteflies have strong pesticide resistance. When choosing pesticides for control, pay attention to adhering to the principle of alternating use and mixed use, for example, Feisao at 1000-times dilution, 10% imidacloprid wettable powder at 2000-times dilution, 40% omethoate emulsifiable concentrate at 1500-times dilution, and Yashilandai at 1000-times dilution can be used alternately.

3. Red spider mite

The red spider mite, commonly known as the fire dragon, is one of the most common pests of osmanthus. Its body is very small, less than 1 mm long, round or oval, orange-yellow or reddish-brown. Every effort should be made to defend against the red spider mite, so the cultivation environment must be ventilated and have suitable humidity, avoiding dryness and stuffiness as much as possible.

Control method: What to do when osmanthus gets bugs? In dry weather, attention should be paid to irrigation combined with fertilization to promote robust plant growth and enhance insect resistance. When applying chemical pesticides, attention should be paid to frequent rotation, because after the application of certain highly toxic pesticides, resistance will develop. Spraying with Manke at 1000-times dilution or 40% dimethoate emulsifiable concentrate at 1500-times dilution gives good control effect.

4. Carmine spider mite

The adult carmine spider mite is 0.5-0.6 mm long. The female mite is oval, vermilion to rusty red, or dark brown to blackish brown; the male mite is slightly diamond-shaped, light yellow, slightly smaller, 0.3-0.4 mm long. Hot and dry seasons are most conducive to its major outbreak, causing the leaves of an entire plant or a patch of osmanthus grove to turn gray-yellow, seriously affecting the growth, flowering and display and appreciation of osmanthus.

Control method: Protect natural enemies, such as small black ladybirds, minute flower bugs, tower six-spotted thrips, Chinese green lacewings, large green lacewings and so on; in winter, clear weeds under the trees and burn them, and use lime sulfur mixture at 0.3-0.5 degrees Baume to kill overwintering adult mites, nymph mites and eggs; Manke at 1000-times dilution or abamectin-pyridaben at 800-times dilution. Now you know what to do when osmanthus gets bugs. Below let us take a look at the prevention and control of its diseases.

III. Prevention of osmanthus diseases

1. Brown spot disease

In the early stage of disease onset, small yellow spots appear on the leaves and gradually expand into a round shape, with a diameter between 2 mm and 10 mm. The spots are yellow-brown to gray-brown, and there is a yellow halo around the spots. Generally, the period from April to October each year is the season of frequent occurrence.

2. Blight spot disease

Blight spot disease mostly invades from the leaf margin and leaf tip, occurring at the edge and tip of the leaf. In the early stage of disease onset, there will be small light brown spots on osmanthus leaves, gradually expanding into round or irregular spots, with dark brown edges. It mostly occurs between July and November.

3. Anthracnose

Osmanthus anthracnose infects osmanthus leaves. In the early stage of disease onset, small chlorotic spots appear on osmanthus leaves, and after gradually expanding they form round, semicircular or oval spots. The spots are light brown to gray-white, with a reddish-brown ring at the edge. Under humid conditions, light pink viscous spore discs appear on the spots. Anthracnose occurs from April to June. The above is what to do when osmanthus gets bugs and the prevention and control methods for osmanthus pests and diseases. Below let us take a look at the treatment methods for the diseases.

Control methods for osmanthus diseases:

1. For the control of the following diseases, first reduce the sources of infection. For example, thoroughly clear fallen diseased leaves in autumn, and for potted osmanthus, promptly remove diseased leaves.

2. Strengthen the management of osmanthus trees. Choose fertile soil or substrate with good drainage to plant osmanthus; apply more organic fertilizer and potassium fertilizer; the planting density should be suitable so as to ventilate and let light through, reduce leaf surface humidity and reduce the occurrence of diseases.

3. In the early stage of disease onset, spray Bordeaux mixture at 1:2:200, and afterwards spray 50% carbendazim wettable powder at 1000-times dilution or 50% benomyl wettable powder at 1000 to 1500-times dilution.

4. In severely diseased areas, when seedlings leave the nursery, they should be soaked and disinfected with 1000-times potassium permanganate solution. The above is brought to you on the prevention and control of osmanthus pests and diseases and what to do when potted osmanthus gets bugs. I hope it can help everyone.

What to do when potted lotus gets bugs, prevention and control of lotus pests and diseases / cut dead leaves and spray pesticide to kill insects

Any plant in nature can get bugs, and lotus is of course no exception. Lotus is one of the top ten famous flowers in our country, and lotus, emerging unstained from the mud, is deeply loved by people. Now many families grow lotus, but they do not know what to do when lotus gets bugs. Below, follow the editor to take a look at the prevention and control of lotus pests and diseases.

I. What to do when lotus gets bugs: spray pesticide to kill the insects

Lotus is one of the top ten famous flowers in our country. With the progress of potting techniques, many people have started growing lotus at home. What to do when lotus gets bugs is the most common problem. Common pests of lotus include aphids, water maggots, stinging caterpillars, cotton leafworm and so on. Different pests require different control methods. Below, follow the editor to take a look at the prevention and control of lotus pests and diseases.

II. Prevention and control of lotus pests and diseases

1. Aphids

Aphids generally begin to harm the floating leaves and small standing leaves of lotus in early May, often concentrating on harming leaf buds, flower buds and leaf backs. Larvae and adults gather in groups to suck sap, with the heaviest damage in late spring and autumn. Control method: 20% fenvalerate at 2000-times dilution can be used.

2. Pear green stinging caterpillar and brown stinging caterpillar

The pear green stinging caterpillar and brown stinging caterpillar, commonly known as stinging caterpillars, mainly harm standing leaves as larvae, generally causing damage from mid-June to September. Control method: remove the worm-eaten leaves and burn them. Spray with 90% trichlorfon at 800-1000-times dilution, or 2.5% deltamethrin at 3000-times dilution.

3. Water maggots

The larvae suck sap on the stem nodes and roots of lotus, causing diseased leaves to turn yellow. Control method: generally lime can be used to drive them away and kill them. Scatter 10-15 kg per 667 sq m (1 mu), but do not use excessively.

4. Large bagworm

It mainly harms standing leaves. In severe cases, twenty or thirty of them can hang on the back of lotus leaves, eating new and old lotus leaves into a mass of holes, or even eating them all up.

Control method: Manual capture can be used for control, and diseased leaves should be removed in time. Spray with 90% trichlorfon at 1500-2000-times dilution plus qingchongjun at 800-times dilution. Clear weeds at the edge of the lotus field and carry out disinfection treatment. For the prevention and control of lotus pests and diseases, let us continue reading below.

5. Cotton leafworm

Also known as the lotus striped noctuid and striped night thief. Newly hatched larvae gather on the back of leaves and nibble, leaving only the upper epidermis and leaf veins, and the damaged leaves look like window screens. After the third instar they disperse to cause damage, eating the leaves into notches, and when they occur in large numbers they can eat all the leaves, or even bite the young tender stems. When a major outbreak occurs, after the larvae eat up one field they can migrate in groups to adjacent fields to cause damage.

Control method: Spray with domestic B.t. emulsion or qingchongjun No. 6 liquid at 500-800-times dilution. Spray with 50% phoxim emulsifiable concentrate at 1000-times dilution, or 2.5% deltamethrin emulsifiable concentrate at 3000-times dilution, or 21% mieshabi emulsifiable concentrate at 4000-times dilution. Through the above introduction, now you know what to do when lotus gets bugs, right? Below let us take a look at the prevention and control of lotus diseases.

III. Prevention and control of lotus diseases

1. Black spot disease

In the early stage of disease onset, chlorotic yellow spots appear on the leaves, and later they become round or irregular, turn brown and have concentric rings, sometimes with a yellow-green halo at the edge, and black mold grows on them, with a diameter of 5-15 mm. In severe cases, the spots join into patches, and except for the leaf veins, the whole leaf withers and turns yellow. This disease is caused by fungi and occurs severely in the rainy season. Under conditions such as continuous cropping in lotus ponds or pots, excessive nitrogen fertilizer application, or excessively high water temperature in summer, the disease is very severe.

Control method: Strengthen cultivation management and remove diseased leaves in time. For plants with relatively severe disease, new soil needs to be replaced before replanting, and do not apply excessive nitrogen fertilizer. When the disease occurs, spray 75% chlorothalonil at 600-800-times dilution for control.

2. Rot disease

It mainly harms leaves, flower stalks and lotus rhizomes. When harming leaves, green wilt-colored patches initially form along the leaf margin. Soon the spots expand inward, and finally the whole leaf turns brown and necrotic. When flower stalks are affected, they turn brown and sunken along the stomatal lines. When lotus rhizomes are affected, they first turn brown, gradually spread to the whip nodes, and necrose longitudinally, and white filamentous substances or pink powdery masses can also be seen growing from the diseased lotus nodes. This disease usually occurs more severely under continuous cropping and in poor soil, and if leaves are often in a water-soaked condition, they are also prone to the disease.

Control method: Fertilize appropriately, and note that the water level should not be too high, so as to avoid soaking the leaves and causing disease. When black spots are found on leaves, remove diseased leaves early, but the junction between the leaf and the petiole needs to be retained to prevent rainwater from invading the body through the petiole wound. Spray 50% carbendazim at 500-times dilution, or 50% yimeijing at 500-times dilution for control.

3. Brown spot disease

It mainly harms lotus leaves. Round spots with a diameter of 0.5-8 mm appear on diseased leaves, light brown to yellow-brown, with darker edges. In the later stage of the disease, many small black mold spots grow on the lesions. The disease is relatively severe in rainy autumn. The pathogen mostly overwinters on residues.

Control method: Remove residual leaves to reduce sources of disease. For severe cases, spray 50% carbendazim at 500-times dilution, or use 80% zineb at 500-800-times dilution for control. The above is all the content on the prevention and control of lotus pests and diseases and what to do when lotus gets bugs. I hope it can help you.