Optimized solution prevention
According to the turf status of the golf course and the type of weeds, comprehensive consideration of the management level and economic ability, targeted weed control programs that are optimally formulated are the basis for successful weed control. An optimized weed control program should meet the following requirements: (1) prevent weeds and control weeds before harm; (2) drug efficacy period of more than 4 months; (3) broad spectrum of herbicides, multiple use of one drug; (4) Environmental safety, no pollution; (5) Easy to operate; (6) Moderate cost; (7) Not susceptible to resistance or delaying resistance; (8) Contrary to conventional management measures; (9) Live a favorable climate; (10) Prevent potential problems. Its soul is prevention-oriented.
Right amount saves money efficiently
To prevent weeds, use normal amounts, and when the weeds emerge and become a serious hazard, increase the dosage appropriately. In order to prevent weeds from developing drug resistance, regular increases in dosage are not recommended. This requires us to actively control weeds before weeds start, or weeds should be controlled when they emerge. When we control pre-emergence weeds at conventional or low levels, the cost is lower. When the emergence of weeds and even serious damage, we have to increase the amount of money, not only to increase the cost, but also increase the difficulty, and may bring pressure to produce weeds resistance. It is also important to understand that the degree of resistance to the same herbicide in different growth stages of different lawns and the same lawn is different and should be treated differently to determine the amount.
Timely application, first of all, refers to the completion of the spraying of herbicides before weeds germinate or just before emergence, control weeds at a very low cost, and maintain a fairly long period of validity. It also contains applications that capture favorable climatic conditions. If the turf director can master the changes of temperature and precipitation in the area under control, he can make full use of the fine weather before the arrival of the rainy season every year to complete the pre-emergent weed control work. On the one hand, he can control the miscellaneous season before the arrival of the rainy season. The occurrence of grass can also avoid the waste caused by the heavy rain after the spray of the herbicide. Most of the pre-emergence and early-post-emergence lawns were irrigated and sprayed. After 24 hours, 70% would be absorbed by the soil colloidal particles. After 48 hours, 90% were adsorbed by the soil colloidal particles. After spraying, there was no impediment to the efficacy of the rain, and within 48 hours after spraying, it was necessary to make up the spray.
Precise spray meticulous
Most of the herbicide spraying equipment on the golf course is a TORO or DEERE brand. Although the specification specifies the operating parameters, such as different nozzle types under different pressures, the required travel speed, throttle size and speed, and gear position Relationships, but after a period of use, the parameters will change. The use of herbicides is very small and the requirements are very precise. Therefore, it is necessary to regularly debug the spraying machinery. Through the water discharge test, the area S of the machine under a certain capacity was measured. There are two ways to test the amount of water: First, fix the pressure, speed, etc., and measure the amount of water discharged from each nozzle for one minute. After averaging, multiply the number of nozzles to obtain the total amount of water A for one minute. Under the same pressure and rotation speed, fix the gear and measure the area B sprayed in one minute. In this way, C = A/B, and the water output C (ml/m2) of the machine under certain parameters is obtained. The total capacity V is used. /C=S(m2). Another method is to fix parameters such as pressure, gear, etc., and use a certain volume of fresh water A to discharge the area B covered by A-capacity fresh water, A/B=C (ml/m2), and then use the total capacity V/C. =S(m2). According to the amount of water required for the soil treatment agent 90 to 110 ml/m3, the pressure, gear position, boom height, etc. are adjusted to the design requirements, measured five times, and averaged. When the sprayer measures the amount and area of ​​the nozzle outflow under each parameter, the amount of herbicide is calculated according to the area. All parameters need to be measured according to the data when spraying. Minimize the error.
Low shear management
The height of herbage will directly affect the herbicide efficacy. Different cutting heights will affect the time and speed of penetration of the pesticide in the plant, which in turn will affect the rate and amount of herbicides adsorbed by the soil at the base of the lawn.
Spray the soil treatment agent, after the medicine needs to be watered and kept moist for 3 to 4 days at the base of the lawn; spray and stem leaf treatment agent, no watering within two days after medicine. Sprinkle the soil treatment agent for 20 to 40 minutes and water for 15 to 18 minutes to prevent turbulence from forming. Watering makes the pesticide form a film layer 3 to 5 cm above the surface of the soil. The irrigation time is small, slow pouring or no watering, which will result in poor or failed weed control.
Adapting to local conditions
Implement classification management and adopt different weed control strategies and technologies for different regions. With the exception of greens, the tees and fairways are the focus of conservation. There are fewer weeds than in the long grass area and sand pits. There are many kinds of weeds in the long grass area and bunker side, especially in the long grass area. The damage is heavy. If it is not controlled in time, it may become the source of weeds in the stadium. The weeds in the woods are manually removed or stems and leaves are treated, and weeds in the long grass area are required to reduce the height of the lawn. In order to ensure the control effect of the weeds in the clumps, the liquid medicine can reach the base of the weeds, and the amount of water can be increased when the medicine is sprayed. The sand pits and slope areas should be ensured to be watered in place after spraying, and one-time watering should not be too much. A small amount will prevent the turf under the slope from being damaged by the turbulence, and the amount of drugs on the slope will be affected. Each turf director should understand the changes in precipitation and temperature at the venue. Before spraying, check the weather conditions in the area for a week or even two weeks, such as temperature, precipitation, wind force and wind direction. Prevent the prevention of weeds from failing due to heavy rain or large temperature drop after spraying due to unclear weather trends.
In conclusion, chemical weeding on golf courses is a rigorous system work. The above five key measures are combined to achieve the desired results.
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