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The effect of fireweed of prevent and kill off of drug of careless pleasant phosphine, besides the biology active of itself of careless pleasant phosphine, namely beyond the action play of medical effect, return the fireweed object with our prevent and kill off, apply medical environment, concern with the means method of use person.
Phosphine of influence careless pleasant weeds the main factor of the effect has:
It is fireweed element. Careless pleasant phosphine is cauline leaf herbicide, weed tall He Xieling concerns the individual plant of the effect and fireweed. Practice makes clear in fireweed 3 to 5 leaves the effect weeds when one pistil. Because right now fireweed is in young age level, grow just germinate, tenderer, return plus root system underdeveloped fight the difference that go against a gender, but just be opposite again herbicide is sensitive, weed so the effect is good. Cross this level, of fireweed fight go against a gender to increase gradually, effect of prevent and kill off drops. Be able to bear or endure of course effect of fireweed of property of a medicine is poorer.
2 it is condition of soil of the taxi that use drug: We sum up good to condition of earthy fat water plot fireweed to grow in practice exuberant, cauline leaf organization is tender, sensitive to herbicide, weed the effect is outstanding. Be in conversely the fireweed that person layer grows in soil of dilettante or arid taxi,
The growth because of itself the environment is harsh, growing pair of harsh environments formed in the process fight go against a gender, the corneous layer of cauline leaf surface is added thick, plant lamina stoma opens business angle is small, poor to the absorbency of herbicide, herbicide effect is so poor.
3 it is the air temperature when using drug. Temperature is to affect herbicide of careless pleasant phosphine to weed the main factor of the effect. After careless Gan Lin is absorbed by fireweed, temperature heals tall the rate that its assign unripe organization to conduct drug heals fast, the dosage that accumulates in rhizome heals much, the effect heals apparent. Hou condition is enraged in extreme low temperature, the herbicide of employ often the effect is poor.
4 it is the air humidity when using drug. In tall the gush below wet air condition applies herbicide to be helpful for the fireweed absorption to herbicide. For example, in fireweed exuberant period, effect of herbicide of the employ when pluvial fine is earlier is apparent. One of reasons are airy humidity better.
5 it is the illumination influence to employ herbicide. Herbicide of careless pleasant phosphor is right the action of fireweed, basically be cauline leaf place of green. So the photosynthesis of chlorophyll is one of its action points.
General situation falls in strong smooth illuminate, photosynthesis is intense, formation photosynthesis product is much, be helpful for the conduction of herbicide and active play.
6 be phosphine of rainfall influence careless pleasant weed the effect. If apply herbicide of careless pleasant phosphine later, rain is encountered to be about to inspect condition inside 6 hours pour affection filling gush. Because rainfall can rinse gush,apply the drug droplet on plant lamina.
7 it is the use means method with use herbicide concerns: Phosphine of for example careless pleasant can make cauline leaf inorganic agent only, do not make edaphic inorganic agent. That is to say of careless pleasant phosphine weed the means that use drug, can be sparge only and cannot use mix person, make medical person use. And when the drug that tick off add, cannot use the well water with the water that contains mud to pledge and higher hardness. These are the influence weeds the main reason of the effect.
8 it is the wind speed when using drug, reach fireweed to whether dew also is concerned. Wind speed can change the drone way that medicine drips, bring about fireweed to cannot get drug, so fireweed cannot die. Additional, the dew on the fireweed when using drug did not work, can reduce the employ concentration of herbicide effectively, reason copy also is differred except the effect.
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