Common pests of Osmunda japonica and their control methods
Harm of Osmunda japonica.
Symptomatic manifestation
5-8 generations occur in the north every year, overwintering with eggs, appearing in early May and flourishing in June. Aphids will suck juice, hurt young leaves and threaten the growth of Osmunda japonica.
Prevention and cure method
In early spring, the old bark of Lagerstroemia indica was scraped off, at the same time, the damaged branches were cut off, and concentrated burning was carried out to eliminate the overwintering eggs as much as possible. Cultivation management should be strengthened in peacetime maintenance to reduce the source of disease.
When the aphid is serious, you can choose to spray skin essence1000-2,000 times or 40% omethoate and 40% acephate 1000- 1500 times to eliminate it, but at the same time, you should pay attention to avoid phytotoxicity. Where conditions permit, measures of artificial propagation and natural enemies can also be taken, and it is a good choice to raise harmonia axyridis or grass ridge larvae in free range. In addition, you can also use colored plates to trap winged aphids or use white tin foil to reflect light and refuse to fly.
Hairborne pests of Osmunda japonica
Symptomatic manifestation
It has two generations a year and overwinters with eggs or nymphs. Female adults and nymphs often suck juice on bud axils, leaves and branches of Lagerstroemia indica, which leads to black leaves falling off, which is not conducive to the growth of Lagerstroemia indica. In addition, the excrement of this pest can induce sooty blotch, which is potentially risky.
Prevention and cure method
In winter and early spring, prune branches, focus on burning insect branches, eliminate eggs as much as possible, and manually scrape off found pests. Strengthen management and quarantine, apply fertilizer reasonably, so as to enhance the insect resistance of plants, avoid excessive plant density, keep plants ventilated and do a good job of light transmission. Polymer film can be mixed with spray, and then sprayed evenly, which will form a film on the surface of plants, making it difficult for insects to breathe and then suffocate and die; Or use its natural enemy, the red-lipped beetle, to hunt and kill. Chemical control can also be taken when necessary.
Common pests of alfalfa and their control methods
Purple flower is an edible ornamental plant, also called foreign leek. Flower friends who like noodles can pinch a few pieces as seasoning, which is very delicious. People like to eat, so are bugs thinking about it? Come and learn how to drive away bugs!
Aphids are common pests of purple flowers.
Pest performance
Aphids, also known as honey insects and drill insects, mostly belong to the Homoptera Aphidae family, which is a sucker pest. They often cluster in leaves, tender stems, flower buds, terminal buds and other parts, sucking juice, causing leaves to shrink, curl and deform, and even causing branches and leaves to wither or even the whole plant to die in serious cases. Honeydew secreted by aphids can also induce sooty blotch, virus disease and ant harm.
Aphid control method
Washing powder kills aphids: Washing powder has contact killing effect on aphids. Scrub aphids on the branches and leaves of flowers and plants with a brush dipped in washing powder and 1: 500 times of water. You can also spray it with a small sprayer, or you can better brush off the honey dew secreted by aphids.
Whether you kill aphids with washing powder or other pesticides, you should pay attention. In the future, you should pick purple flowers to eat, and wash them several times to ensure that there are no chemical residues before eating. Otherwise, if you speak, you will spit out the foam of washing powder, and your stomach will be attacked by drugs.
Cicada, a common pest of purple flowers
Pest performance
Nymphs or adults suck juice with their mouths, making the leaves appear pale white spots. When the injury is serious, it is patchy, or the epidermis is stabbed, which makes the branches and leaves wither.
The harm of leafhoppers is not only superficial, but also often spreads plant viruses, such as inducing purple mosaic disease and purple mosaic disease, which is very annoying.
There are many kinds of leafhoppers, so flower lovers should pay more attention to observation in daily maintenance. If they find bugs, they should be trapped and killed in time to prevent them from reproducing.
Prevention and cure method
Spraying 2.5% deltamethrin wettable powder 2000 times, or 90% trichlorfon stock solution 800 times, or 50% chlorfenapyr EC 1000 times.
Control methods of common pests in longevity flower
Aphids: Longevity flowers have long aphids. When the quantity is small, it can be washed directly with water, and when the quantity is large, it can be sprayed with chemicals. Frankliniella occidentalis: treated with stick insects. Scale insects: spraying carbendazim powder. Cyclamen mite: spray acaricide. Mushroom mosquito larvae: controlled by suitable soil fungicides.
aphid
Aphids do serious harm to longevity flowers, which usually appear in winter and early spring. Once aphids are found to need timely prevention and control, if left unchecked, the number of aphids will continue to increase, flooding and out of control.
For the prevention and control of aphids, when the amount is small, it can be washed directly with clean water, and when the amount is large, it can be sprayed with chemicals.
Western flower thrips
Frankliniella occidentalis is rare for longevity flowers, but it still needs attention. Thrips like to invade the soft tissue of the growing point of vigorous plants. It is suggested to keep armyworms at home and check the plants every week to avoid large areas of thrips.
scale insect
It is difficult to eradicate axillary buds and growing points in greenhouse, and the key lies in prevention. Once scale insects are found in plants, they should be scraped off in time to prevent diffusion. If the indoor temperature is high, pay attention to ventilation and spray carbendazim powder in time for sterilization.
Cyclamen mite
Cyclamen mites don't like warm weather, so they seldom do harm in summer, mainly in winter. Its main harm is to cause abnormal growth of plants and hinder normal growth. Cyclamen mites are so small that it is difficult for human eyes to observe them directly, and it takes 20 times the microscope to see them. Therefore, it is necessary to observe carefully in daily maintenance and spray acaricide in time.
Leaf roller moth
The leaf roller moth is the larva of the moth, and the leaves will wrap it into a very distinctive form. In the outbreak of insect pests, if not found in time, the leaves of plants will gradually wither and even die.
Mushroom mosquito larva
Boreholes often appear in cuttings and stems of seedlings on diseased plants infected with pine rot fungi, which need to be controlled by suitable soil fungicides.
Common pests of Sedum sarmentosum and their control methods
Sedum sarmentosum is resistant to high temperature and can grow well in Xinjiang where the average summer temperature is as high as 35 degrees Celsius. Therefore, if the temperature is too low, it will inevitably affect the growth of Sedum sarmentosum and even breed pests!
Common Pest of Sedum sarmentosum: Scale Insects
Pest performance
Scale insects attach to the surface of Sedum sarmentosum leaves, and secretions will pollute the leaves and even cause serious consequences of leaf withering.
Causes of scale insects: disinfection is not timely and eggs breed.
Prevention and cure method
If pesticides are sprayed in time during the nymph period, 40% omethoate 1000 times solution can be sprayed once every 8 days for 2 ~ 3 times continuously. Mixing wine with water can also effectively kill scale insects without damaging the leaflets of Sedum sarmentosum.
It is more convenient for flower friends with rice vinegar at home. Soaking rice vinegar with cotton balls and gently rubbing the damaged leaves can wipe off the scale insects and kill them, and also make the leaves turn green and shiny again.
Common Pest of Sedum sarmentosum: Aphids
Pest performance
Aphids are often attached to the joints of leaves and branches, which are dense and disgusting. Good plants are full of insects, and the growth and ornamental effect of leaves will be affected.
Prevention and cure method
Washing powder has contact killing effect on aphids. Scrub aphids on the branches and leaves of flowers and plants with a brush dipped in washing powder and 1: 500 times of water, or spray with a small sprayer, and the honey dew secreted by aphids can also be washed away.
Common pests of Sedum sarmentosum: butterflies and other eggs.
Pest performance
Flower friends often hang Sedum sarmentosum on the balcony, and butterflies will fly to lay eggs on the leaves. These eggs will become black and white insects after hatching, biting leaves and even getting into branches, destroying plants and even causing the branches of plants to break.
Prevention and cure method
Buy a flower spray.
If the branches are seriously damaged, they can be cut down for cutting maintenance. Pull out the plants, disinfect them, and then change pots for transplantation.