Month: June 2023

　　Cloud pine in the cultivation process will often appear leaf yellowing situation, and cause leaf yellowing reasons are many, too much water, too little, too strong sunlight, too weak, too much fertilizer, too little will cause the leaves of different degrees of yellowing. I will give you a detailed introduction to the cloud pine leaves yellowing causes and treatment methods.

Cloud pine

　　1, water yellow: young leaves dark yellow and no luster, old leaves no obvious changes, branches and trunks tiny yellow-green, new tips shrinkage does not grow, indicating that too much watering. Put the flowers off the pot in the ventilated shade since blowing dry soil mass and then put back into the pot.

　　2, dry yellow: water shortage of yellow and water yellow is not the same, water shortage of yellow for the leaf tips or edge withered, dry, old leaves withered from the bottom up, but the new leaves grow more normal. Pay attention to watering when watering enough, water thoroughly can be.

　　3, burning yellow: strong direct sunlight to some shade-loving flowers (such as hanging orchids (details), jade hairpin, etc.), easy to cause flowers leaf tips, leaf edges withered, the sunrise part of the leaves appear yellow spots. Move to the shade can be.

　　4, lack of light yellow: long time set shade environment, the leaves do not get enough sunlight, can not form chlorophyll, the whole plant leaves become yellow and then fall off, supplemental light can avoid this disease.

　　5, fertilizer yellow: fertilization too much or too large concentration caused by the flower yellowing, performance in the top of the new leaves appear dry brown, general leaf surface fat and lusterless, and bump not stretch, the old leaves scorched and fall off. Should immediately stop fertilization, serious with a lot of cleaning flush part of the fertilizer.

　　6, lack of fertilizer yellow: manifested in the young leaves color becomes light, yellow or light green, while the old leaves are more normal or gradually from green to yellow. Check the potting soil, such as the phenomenon of dry caking should be changed, usually thin fertilizer diligently and water some alum water at the right time.

　　In the past, it was regarded as the day when spring plowing began, as the Tang poem goes: “The drizzle is new, and the thunder is beginning to stir. In the past, it was regarded as the beginning of spring cultivation. The insects are the first to see this vitality, and the original meaning of jingxing is that the weather warms up and spring thunder begins to sound, awakening the insects hibernating in the ground. So in this March, the family grows more succulents flower friends, may be a careless in the back of the leaves plant heart found familiar mealybugs, or in some are blooming succulent flowers found on the smell of honey and aphids.

Succulents

　　March is an important month to fight with insects, in this month, if not a little control mealybugs, let them know exactly who is in charge, once the summer unrestrained up, see not only they are four generations together, more will aggravate the black rot, soot disease and other diseases, and summer kill insects, because of the high temperature and strong sunlight, especially easy to trigger the pest. Therefore, March does not prevent insects, July sadness.

　　Let’s start with the aphids that are easily attracted by the blooming of succulent plants in this season, in fact, there is nothing to say. Because in front of the mealybug, other pests belong to the simple mode, you only need to spray the flower protection, or avermectin, it is very simple to take away the aphids in one wave, even without drugs, just need to gather the dense aphids of that flower arrow cut off can be, aphids have a very strong swarming, as long as they are not found late, before they spread, cut off, it is gone. More often than not, the aphids are gone during the time you are fighting to the death with the mealybugs. Why is March a good time to kill mealybugs?

　　Mealybugs generally occur 1-3 generations in a year, a few 4-5 generations, there is often an intermediate period before the transformation of the rabbit into an adult, this stage is sluggish in appearance, and some even stop feeding, this time is around the sting of the year, the second is the end of May to early June. At this time, most of the worm hatching soon, the body surface has not yet secreted wax, the shell is not formed, the drug is still easy to kill.

　　 Recently, there are a lot of flower friends in a good pot of nettle grass suddenly found wilted. The actual fact is that there are several reasons for the wilting of nettle grass, such as lack of water, waterlogging, and cold weather.

nettle grass

　　1, lack of water

　　The best solution is to replenish the water immediately, and generally speaking, it will recover after half a day. The correct watering method should be to look at the topsoil, between dry and wet, watering is watered thoroughly, the number of times not fixed, look at the soil to see the day at any time change. The topsoil is a shallow layer of 3 to 5 cm, try with toothpicks or tweezers to test the wet and dry situation, and water thoroughly when it is dry.

　　2, watering too much

　　Frequent watering, waterlogging inside the soil, the root system does not breathe well, which will lead to rotten roots and wilting. General waterlogging rotten roots of the flower is very difficult to reply, flower friends can try to pull out and repot, but the possibility of recovery is not too great.

　　3, the temperature is too low

　　Nettle grass in the temperature below 13 ℃, the leaves will appear yellowing, wilting, so in the region if the winter can not guarantee the temperature, it is recommended not to easily raise nettle grass.

　　4、Lighting reason

　　Nettle grass is most afraid of summer hot sun exposure, strong sun exposure leaf edge scorched, fall off, but in the long-term growth process, but must have suitable sunlight exposure, long-term placed in the shade of the room, the leaves lose luster, stem slender, therefore, there should be 4-6 hours of diffused light every day. Insufficient indoor light, the potted plant can be placed under a fluorescent lamp at night to increase the number of hours of light to ensure that the plant’s demand for low light.

　　5、Air humidity problem

　　In addition to watering to increase the humidity of the potting soil, foliar spraying and ground sprinkling are more necessary. Keeping high air humidity is good for the growth of nettle stems and leaves. However, the potting soil should be well drained, not waterlogged, and the leaves should not be immersed in water spray for a long time, otherwise the leaves will turn white and easily cause shedding and decay.

　　But in winter or rainy days, the potting soil can be slightly dry, air humidity can be moderate. Conditional living room can be sprayed in the pot plant around the pedestal, the ground and other places; to ensure that there is sufficient air humidity. It can also be cultivated in a glass box or large wide-mouth jar with fine sand or perlite as the substrate.

　　Lavender is a relatively common flowering plant and a natural spice plant, but in the process of cultivation, lavender can develop wilt disease, which occurs in different areas, especially in the seedling stage, often with patches of lot death, and occurs in Xi’an in Shaanxi and Jun County in Henan.

Lavender

　　First, the symptoms of the disease: annual seedlings or cuttings are affected when the first plant wilting, water loss, dull leaves, the top of the leaf branches downward bending drooping, the most obvious performance in the current bud period. The lighter ones can recover at night, the heavier ones die in two or three days, the roots rot, and the stem ducts turn brown and show luster. Seedlings more than three years old, in addition to the same performance as the seedling disease, wilting symptoms appear in the center or edge of the plant, gradually develop inward and outward, the branches wilted and died, and finally the whole plant died, the degree of damage varies with the age of the plant, species. It usually starts in May and reaches its peak in July and August. French lavender has a heavy disease, while the former Soviet Union’s 2-417 varieties have a light disease.

　　The incidence of the disease is not only related to temperature and precipitation, but also to the height of the terrain and drainage. The disease is most prominent in summer after heavy rainfall, and the dead seedlings are serious. The lighter more than ten percent, the heavier more than ninety percent death.

　　Second, the field pharmaceutical trials: “9.20” effectiveness in about 15.5%, the effectiveness of ammonium daidze in about 13.3%, the effectiveness of methyl tolbutazin in about 2.6%, ethyl tolbutazin effectiveness in about 26%, with antimicrobial 500 ppm effectiveness in about 23%, 300 ppm effectiveness 82%, 200 ppm The effectiveness of antimicrobial 500 ppm is about 23%, 300 ppm is 82%, 200 ppm is 79%, 100 ppm is 89%, but the effect of root irrigation is not good. It is recommended to strengthen management in cultivation, use disease-resistant varieties, practice ridge cropping, cultivate in sandy soil, and apply more phosphorus and potassium fertilizers to enhance resistance. Also refer to the control methods of watermelon, cotton, peanut and other crops wilt.