What are the methods for preventing flower diseases in summer?
Many friends are unaware that flower diseases and insect pests are actually two completely different concepts. Although we always refer to them together as pests and diseases, there is a very big difference when it comes to treatment. The hot summer is coming soon, so the editor will introduce the methods for preventing flower diseases in summer.
Many friends are unaware that flower diseases and insect pests are actually two completely different concepts. Although we always refer to them together as pests and diseases, there is a very big difference when it comes to treatment. The hot summer is coming soon, so the editor will introduce the methods for preventing flower diseases in summer.
Rose
As temperatures rise and rainfall increases, infection by pathogens that easily cause plant diseases follows. In terms of disease prevention and control, we must focus on prevention and use treatment as a supplement. Under conditions of high temperature, high humidity, poor ventilation, and the presence of sources of pathogen infection, diseases are extremely likely to occur. Therefore, whether plants and flowers are grown in the ground or in pots, the first thing to consider is their ventilation and air-flow conditions, and then, according to the disease resistance of the flowers and plants themselves, choose targeted remedies for various diseases. In the preparation and use of pesticides for disease prevention and treatment, we must adopt a scientific attitude, strictly follow the ratios, and put prevention first. In other words, under high-temperature and high-humidity climate conditions, even if no disease occurs, antibacterial and disease-treating chemicals should still be sprayed regularly.
In addition, for flowers such as roses, azaleas, and orchids that are prone to brown spot and anthracnose, not only should prevention come first, but thiophanate-methyl or chlorothalonil and other chemicals should also be regularly diluted with water at a ratio of about 1:400 and sprayed on the plant leaves. Especially when the temperature reaches 25°C-35°C, or during the plum rain season when the air humidity is relatively high, spraying must be done once every 7-10 days.
After a heavy rainstorm, although outdoor plants have already been sprayed with antibacterial and disease-treating chemicals, these will have been washed away by the rain, so they must be sprayed again. Do not be careless. Once a plant develops disease, diseased leaves and branches should be pruned promptly to prevent cross-infection. Otherwise, the occurrence of disease will not only lead to poor plant growth, but may even cause death.
Summer flower diseases and their control
In June, temperatures continue to rise, and rainfall increases from south to north across China. After Grain Full, the weather gradually turns hotter, marking the imminent arrival of summer. At this time, temperatures are high and humidity is high. The middle and lower reaches of the Yangtze River are in the plum rain season, and it is the month with the largest rainfall of the year. Flower diseases are mainly of two types: physiological and infectious. Physiological diseases refer to diseases caused by adverse environments, such as water imbalance, unsuitable temperature and light conditions, deficiency or excess of a certain nutrient element, and soil salt damage. Infectious diseases refer to diseases caused by infection by harmful organisms such as fungi, bacteria, viruses, and nematodes. Leaves affected by disease will show discoloration, necrosis, rot, deformity, and wilting, seriously affecting their ornamental value.Insect pests are also something that cannot be ignored in home flower care. There are many kinds of pests that harm flowers, and often a single flower can be harmed by many kinds of pests, preventing the plant from growing normally and even causing death. According to incomplete statistics, there are more than 5,000 species of flower pests in China, the vast majority of which are insects, followed by mites and mollusks. According to feeding method and the plant parts damaged, they are usually divided into four categories: piercing-sucking pests, leaf-eating pests, trunk-boring pests, and underground pests.
Common home flower diseases and their control
Control methods for powdery mildew: spray 25% triadimefon wettable powder at 2000-3000 times dilution, or 50% carbendazim wettable powder at 500-600 times dilution, or 70% thiophanate-methyl wettable powder at 600-800 times dilution, etc. When the disease is severe, spray once every 7-10 days, for 2-3 consecutive sprays. Different chemicals should be used alternately to avoid the development of chemical resistance in the pathogen.
Triadimefon wettable powder is a specific remedy for treating powdery mildew. Its residual effect period can reach 20-25 days. After spraying, the powdery white layer on the affected parts turns dark gray, shrinks, and disappears. It is a relatively ideal chemical for controlling powdery mildew.
In the home, baking soda can also be used for spraying. Spraying affected plants with a 1% baking soda solution can achieve a control rate of more than 80% for flower powdery mildew.
Common summer home flower diseases and their control
In June, temperatures continue to rise, and rainfall increases from south to north across China. After Grain Full, the weather gradually turns hotter, marking the imminent arrival of summer. At this time, temperatures are high and humidity is high. The middle and lower reaches of the Yangtze River are in the plum rain season, and it is the month with the largest rainfall of the year. Flowers at this time are most susceptible to pests and diseases. When plants become sick and wilt, and pests eat the leaves, can you accurately identify the cause?In fact, flower illness is mainly of two types: physiological diseases and infectious diseases. Physiological diseases refer to diseases caused by adverse environments, such as water imbalance, unsuitable temperature and light conditions, deficiency or excess of a certain nutrient element, and soil salt damage. Infectious diseases refer to diseases caused by infection by harmful organisms such as fungi, bacteria, viruses, and nematodes. Leaves affected by disease will show discoloration, necrosis, rot, deformity, and wilting, seriously affecting their ornamental value.
Insect pests are also something that cannot be ignored in home flower care. There are many kinds of pests that harm flowers, and often a single flower can be harmed by many kinds of pests, preventing the plant from growing normally and even causing death. According to incomplete statistics, there are more than 5,000 species of flower pests in China, the vast majority of which are insects, followed by mites and mollusks. According to feeding method and the plant parts damaged, they are usually divided into four categories: piercing-sucking pests, leaf-eating pests, trunk-boring pests, and underground pests.
Seeing your beloved flowers and plants wither day by day under pest and disease damage must make you very sad. Only by accurately identifying the cause can you prescribe the right remedy, so that your flowers and plants can be freed from the troubles of pests and diseases and grow healthily!
Common home flower diseases and their control
Control methods for powdery mildew: spray 25% triadimefon wettable powder at 2000-3000 times dilution, or 50% carbendazim wettable powder at 500-600 times dilution, or 70% thiophanate-methyl wettable powder at 600-800 times dilution, etc. When the disease is severe, spray once every 7-10 days, for 2-3 consecutive sprays. Different chemicals should be used alternately to avoid the development of chemical resistance in the pathogen.
Triadimefon wettable powder is a specific remedy for treating powdery mildew. Its residual effect period can reach 20-25 days. After spraying, the powdery white layer on the affected parts turns dark gray, shrinks, and disappears. It is a relatively ideal chemical for controlling powdery mildew.
In the home, baking soda can also be used for spraying. Spraying affected plants with a 1% baking soda solution can achieve a control rate of more than 80% for flower powdery mildew. African jasmine anthracnose
For leaf diseases such as African jasmine anthracnose, snake plant leaf spot, aloe round spot, Malabar spinach purple spot, sago palm leaf spot, and arrowroot leaf blight, the control methods are:
1. Promptly remove and destroy diseased leaves; 2. In the early stage of disease, spray 75% chlorothalonil wettable powder at 800 times dilution, or 50% carbendazim wettable powder at 1000 times dilution, or 70% thiophanate-methyl wettable powder at 800 times dilution, or 70% zineb wettable powder at 800 times dilution, as well as some sterilizing chemicals to prevent disease. Spray the leaves once every 7-10 days, for 2 to 3 consecutive times, to achieve relatively good results;
3. Keep the plant well ventilated and exposed to light, and promptly drain any accumulated water in the potting soil. Control soil moisture, eliminate the harm of high temperature and high humidity to the plant, and promote robust plant growth so as to achieve good disease prevention results. In summer, place it in a relatively cool, semi-shaded environment, and avoid exposure to strong sunlight.
For scale insects such as the cottony cushion scale that harms pittosporum, the brown soft scale that harms rubber trees, the blackish circular shield scale that harms sago palms, and the red wax scale and white wheel shield scale that harm orange jasmine, the control methods are:
1. Prune off infested branches; 2. Apply 3% carbofuran granules to the roots; each pot (about 20 cm in diameter) can be given 2-3 grams, then cover with soil and water.
3. During the peak hatching period of nymphs, before wax has formed or just as the wax layer begins to form, spray the branches and leaves with 40% methidathion emulsifiable concentrate at 1500-2000 times dilution, or 6% imidacloprid soluble liquid at 2000 times dilution, or pyrethroid pesticides (insecticides) at 2500 times dilution. Use the above three chemicals alternately, spraying once every 7-10 days for 2-3 consecutive sprays, and good results can be achieved. The key to spraying lies in seizing the timing (the nymph stage); once the scale shell has formed, spraying is unlikely to be effective.
At home, the following can also be used: 1. Rice water with a small amount of laundry detergent, brushed onto branches and leaves;
2. Use a cotton ball dipped in vinegar to wipe the leaves and branches, which can kill scale insects;
3. Repeatedly wipe branches and leaves infested with scale insects using high-proof liquor.
Brown soft scale harming a rubber tree
For cotton bollworm harming kalanchoe, the control methods are:
Handpick the larvae; spray 1.2% nicotine-sophocarpidine emulsifiable concentrate at 800-1000 times dilution; when the infestation is severe, household sanitary insecticides can be sprayed; you can also soak cigarette tobacco with a high nicotine content for 24 hours and spray it to kill them. Mites (also called red spider mites) can harm the leaves of many plants in summer. The control methods are:
Remove diseased and pest-infested branches and burn them in a centralized manner; when the mite population does not affect plant growth, spray clean water to wash them off; when the pest infestation is severe (June-July), commonly available biological agents on the market such as biological insecticide and insecticide king have relatively good control effects.
Do not use dichlorvos to kill mites; dichlorvos has the effect of stimulating mite proliferation, and do not use pyrethroid pesticides either (most household insecticides used to kill mosquitoes and flies are of this type), as they are ineffective against mites.
At home, red chili peppers can also be boiled in water for one hour and then sprayed; or one of garlic, ginger, or Sichuan pepper can be mashed, soaked in water for 12 hours, and then sprayed.
Six methods to eliminate insects and ants in flower pots
1. When small flying insects appear in a flower pot, use three or four cotton swabs (cotton sticks), soak them thoroughly in dichlorvos (until it is just short of dripping), insert the handle ends into the potting soil around the plant, cover the potted flower with a plastic bag, and the flying insects can be eliminated.
2. Dissolve one tablespoon of laundry detergent in 4 liters of water, and spray the flower leaves every two weeks to completely eliminate whiteflies and bacteria.
3. Mix 4 cups of flour and half a cup of milk into 20 liters of water, stir, filter through gauze, and spray on flower leaves to kill mites and their eggs.
4. Pour beer into a shallow dish placed under the flower pot soil; snails that crawl in will drown.
5. Mash one large garlic bulb, mix it with one tablespoon of pepper into half a liter of water, and after one hour, spray it on flower leaves to prevent mouse intrusion.
6. If ants appear in a flower pot, soak cigarette butts and cut tobacco in hot water for one or two days. When the water turns dark brown, sprinkle part of the water on the flower stems and leaves, and after diluting the rest, pour it into the flower pot to eliminate them.