Watermelon Field Qiao Weed
The occurrence of weeds in watermelon field has two peak periods. The first peak period is the excavation of watermelon melon seedlings, and weeds are also excavated in large numbers. The weeds in this period account for 60% of the total number of weeds in the whole growth period of watermelon. The second peak is when the watermelon grows about 70 centimeters.
First, it is recommended to cover the plastic film to reduce the chance of weeds unearthed.
In addition, the watermelon field can be herbicided with chemical herbicides. There are two types of herbicides in the watermelon field: non-selective and selective. The former can effectively control all kinds of weeds, while the latter can selectively control one or a certain type of weeds. During the peak period of the first weed occurrence, herbicides such as graficin, grafloxacin, ampicillin, ectoine, herbicide and other herbicides can be applied to the soil surface before the watermelon seedlings are excavated; During the peak period, herbicides such as grass cover, safe and stable grasshoppers, and safe weeds should be used. These herbicides can be sprayed on grass weeds at the 2-5 leaf stage to prevent weeds. Watermelon seedlings safe.
Third, the use of herbicide technology.
1. Non-selective herbicides: If this type of herbicide is used improperly, it is easy to cause damage to watermelon seedlings, and it is appropriate to apply watermelon before sowing after sowing. Such as grass grazing: can be planted before sowing, mu 50% CWP WP 150-200 grams of surface spray, control of annual weeds, grass killing: before the emergence of watermelon, 80% per acre with grass Wettable powder 150-200 grams of surface spray.
2, select herbicides. This type of herbicide is suitable for use during the growing period of the watermelon and will not cause phytotoxicity to the watermelon. For example, Gaoxoneng can control annual and a few perennial grasses weeds, weeds in grass, 2-5 leaf phase, control annual valerian, use 12.5% ​​per acre with 65 ml of emulsifiable oil, leaf and leaf spray treatment , to prevent the use of perennial grasses to double the dosage. Steady and stable kill: Effective against annual and perennial grasses, but not against broad-leaved weeds, in the 2-5 leaf stage of grass, with 35% or 15% of fine stable per mu. Emulsifiable oil 70-130 ml, spraying stems and leaves. Fine grass gram: spraying stems and leaves during the 2-5 leaf stage of grass weeds, the efficacy is fast, and the effect is good.
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