Using soil-enclosed herbicides, what about weeds that have been unearthed? What are the key points for the prevention and treatment of lawn "cancer" summer spot blight? How to tell if a grub is poisoned... Lawn diseases, insects, weeds and other problems all cause headaches for lawn producers. Pan Wei, promotion manager of Shenzhen Bafang Zongheng Ecological Technology Co., Ltd., shared the prevention and maintenance technology of key lawn diseases and insect pests with the reporter of China Flower News.
Key weed control
Pan Wei's explanation was straightforward: "Lawn weed control should control the risk of drug harm. The prevention and control cycle of insecticide fungicides is relatively short, generally 2 to 3 days to see the initial effect, once the prevention effect is found to be not ideal, increase the amount or change the dressing, you can immediately play again. Lawn herbicide control cycle is relatively long, it takes 10 to 15 days to kill most of the weeds, and some even exceed 20 days, once the effect is found to be unsatisfactory, the weeds have grown, and the back will be passive. Increased doses can also lead to drug harm, reduced safety, sometimes even no drug options, high cost and clean removal of manual weeding. For lawn producers, it is often the young stage that needs to be weededed, and the safety requirements are higher. ”
Lawn weed control includes spring weed sealing dual-effect technology and malignant broad-leaved weed control technology.
Pan Wei said that there are two common problems in the control of weeds in the spring lawn: what about the weeds that have been unearthed when using soil closure herbicides alone? See the grass to hit the medicine, the grass is difficult to get out, after a period of time and then out of the second stubble grass what to do?
To solve the above problems, it is necessary to clarify the characteristics of the occurrence of weeds in the spring lawn, one is a large number, there are a large number of weed seeds in the soil, which can only be reduced and cannot be eradicated, and the temperature and humidity in the spring are suitable for seed germination, which is a critical period for a large number of weeds to emerge; the second is a long time, and the weed seeds are different in depth in the soil, and the excavation is different and the duration is long. Therefore, the key to the control of weeds in the spring lawn is to block the dual-effect technology.
The period of use of the ban double-effect technique is the time period when most of the weeds have been unearthed and some of which have not been unearthed. "Sealing" means that it has the effect of soil sealing, which can seal the weeds that have not been unearthed, and suffocate the weed seeds that have not germinated in the soil; "killing" has the effect of weeding the stems and leaves, which can completely kill the weeds that have been unearthed. And because there is less grass and more small grass, the overall weeding effect is good and more secure.
The program requires both herbicides that play a role in soil sealing and products with stem and leaf weeding functions, which complement each other and are indispensable. Warm season type lawn spring sealing double effect available package for "Pingding" 1 set + "Baiping Seal" 50 ml + "brake Talong" 2 bags, with 30 pounds of water, can spray 330 square meters of lawn. Cold season type lawn sealing double effect available package for "Shengping" half set + "Baiping seal" 50 ml + "brake talon" 2 bags, mixed with 30 pounds of water, can spray 330 square meters.
In autumn, it is mainly a good idea to control over-aged weeds, use blocking agents, and use malignant broad-leaved weed control technology - broad-leaved weed control technology - broad-leaved set.
Specific usage of the Kokon package:
Cold season lawn, "wide diligence" 30 ml + "brake ta long" 20 ml, mixed with water 30 pounds, spray 200 square meters of lawn.
Warm season lawn, "broad diligence" 20 ml + "brake ta long" 20 ml, mixed with water 30 pounds, spray 200 square meters of lawn.
Pan Wei pointed out the characteristics of the Generous Attendance Package:
First, the effect is very fast: 1 to 2 days to see the effect;
Second, the weed killing is thorough: the systemic conduction type, the herbicide from the weed leaf to the root system takes time, but it can kill the weed root system, and the grass cutting and root removal are more thorough;
Third, there are special effects for the elimination of evil grasses: thorny vegetables, small flying puffs, spotted brocade, ask thorns, lettuce, duck plants, spinosa and other weeds of the Asteraceae, legumes, and vine families can be removed. Later, Pan Wei shared an example of using the package to prevent weeds.
Key disease prevention and control
The three main diseases of the lawn are brown spot disease, rotting blight and summer spot blight.
Pan Wei said that the occurrence of brown spot disease in lawns has a lot to do with soil, temperature and humidity, fertilization and pruning.
Brown spot disease on the lawn
The daily maintenance measures for the prevention and control of brown spot disease in lawns are as follows:
Water: a small amount of multiple times, reasonable irrigation, especially in the high temperature season, avoid evening watering, avoid flood irrigation, morning watering can better prevent the occurrence of diseases.
Fertilizer: scientific collocation, less or no nitrogen fertilizer in spring and autumn, maintain a certain amount of phosphorus and potassium fertilizer. Autumn fertilization can make the lawn greener and stronger.
Shearing: moderate pruning, no dew on sunny days, timely pruning (generally 5 cm to 6 cm) in case of conditions, timely removal of dry grass layers and disease residues, improving ventilation and light conditions while better reducing the source of infection.
Nutrient: improve the soil, rapid replenishment, combined with the use of multi-functional water-soluble fertilizer in the growing season, promote multiple roots, strengthen plants, and improve lawn stress resistance.
There are four steps to the prevention and control of brown spot disease in lawns, namely soil disinfection, prevention and protection, prevention and protection at the beginning of the occurrence and protection of severe occurrence. Soil disinfection agents, mainly used in nicoxine; preventive and protective agents include bacillus qing, daisen manganese zinc, lactopyrronitrile, etc.; systemic therapy agents are 1. benzimidazole: carbendazim, methyltropine; 2. triazole: triazolone, propaconazole, pentazole, phenyl ether methylcyclazole, etc., special effects; 3. Methoxyacrylates: pyrazolimate, pyrazole ester, oxime ester, etc., high efficiency. 4. Succinate dehydrogenase inhibitor (SDHI): pyrimidine, fluamide, etc. Pay attention to the rotation of agents to avoid drug resistance.
Pan Wei said that before the occurrence of the disease (late April to early May), it is best to use a broad-spectrum protective fungicide for prevention, and recommends 50% methylthiopramine suspension (reto) or 50% bacillus suspension (Dasshuangning) 1000 times spray treatment, continuous use 2 to 3 times, with an interval of 15 to 120 days. Because the suspension agent has the advantages of environmental protection without dust drift, fine adhesion of particles, and resistance to rain washing, the medicinal effect period is long and conducive to protection.
Pan Wei also gave a detailed explanation of the occurrence of putrefaction blight and summer spot blight from the occurrence law to the characteristics of harm and prevention and control measures.
Key pest control
The more serious damage of underground pests on the lawn is grub, and the damage of foliar pests is the twill moth and the light sword moth.
Because the lawn grass is often trimmed, the upper environment is relatively unstable, while the underground part of the lawn is relatively stable, suitable for the life of underground pests, so the harm caused by underground pests is a long-term hazard and often harmful. The harm of above-ground pests is a temporary hazard and an outbreak hazard.
Larvae and adults of grubs
Grub control is mainly in two periods, one is the spring larval stage, and the other is the late summer period when the larvae have just hatched. In terms of medication time, the high temperature season chooses to take medicine in the evening, and when the temperature is low, it can be taken at noon. Watering is required before taking the drug, especially in the case of dry soil, watering one day in advance is conducive to the movement of underground pests to the surface, thereby improving the control effect. Pan Wei gave three medication regimens.
Scheme 1: 15% chlorpyrifos granules (di meng) a bag of one kilogram mixed sand 10 kg sprinkled, sprinkled after watering for 15 to 20 minutes, to promote rapid penetration of the agent into the soil. This scheme is convenient to use and has a long effective period, but the insecticidal effect is slow, and there is a certain odor during use.
Scheme 2: 10% imidacloprid (crown) 300 times + 5% kung fu permethrin microemulsion 300 times (garden gong) spray, spray wet spray, spray immediately after watering for 10 to 15 minutes to promote the penetration of the agent. This scheme has good quick-acting, long-lasting effect, no irritating taste, and is used when grubs are seriously harmful, and the advantages are greater.
Scheme 3: 30% kung fu prethroid + thiamethoxine suspension agent (sanbiao) 300 times spray. It is characterized by easy use of dual compounding, high content and high activity, longer effectiveness of microcapsulation agents, and no irritation of environmentally friendly dosage forms.
For twill moths and light sword moths, 5% kung fumethrin microemulsion (Yuan Gong) 500 times or 5% perchlorochloride microemulsion (Ruima) 500 spray treatment can be used at the beginning of the occurrence. In severe cases, use 5% Kung Fu Permethrin Microemulsion (Yuan Gong) 500 times + 5% Perchloromethyl Vitamin Salt MicroEmulsion (Rui Chi) 500 Spray Treatment.
"Moth pests emerge day and night, and the effect of medication in the evening is better; young larvae are more sensitive and try to choose early medication; when the insect infestation occurs seriously and the resistance is increasing, it is recommended that the agents of different mechanisms of action be mixed or rotated, which can delay the resistance of the insect body." Pan Wei summarized the key points of leaf-eating pest control technology.
Lawn maintenance management
Pan Wei mentioned that lawn management requires three kinds of seven nutrients, and the physical operations in maintenance management include punching holes, rolling, sand laying, combing grass, and pruning.
After introducing the advantages and disadvantages of punching, rolling, combing and other links, he focused on the role of sand laying - promoting the growth of tillers and creeping stems and increasing the density of the lawn; indirectly improving the height of pruning, improving the cold and drought resistance of the lawn; improving the flatness of the flat bed, degrading the dry grass layer, and improving the permeability of the flat bed; laying sand before winter can promote early return to greening, improve the temperature of the flat bed, and reduce the evaporation of water in winter.
Lawn punching
Pan Wei used a chart to clearly show the effect of pruning height on weeds, lawn density and root system.
Source: China Flower News