How to discern whether has pesticide deteriorated? Small today make up specific will be shared for everybody discern the method with whether degenerative pesticide, hope to be helped somewhat to you.
One, convention differentiates a method
1, attenuant law: Take emulsion pesticide 100 grams, water is added in putting vitreous bottle 300 grams. Forcibly oscillation, quiet place after half hours, if medical fluid chroma is inhomogenous, there is lacteal oil to appear above, bottom has sedimentary, show this drug already invalidation. Lacteal oil is more, property of a medicine is poorer.
2, float law: Take but pesticide of wet sex powder 1 gram, even ground is scattered on face of 200 milliliter clear water, if be inside 1 minute wet sink of water for not invalidation pesticide, it is invalidation pesticide conversely.
3, oscillation law: When emulsion pesticide occurrence grease is detached, usable force oscillation, jolty medicine bottle, quiet place after 1 hour, if still appear detached layer, show this drug already invalidation.
4, thermosol law: the Wen Shuizhong that sedimentary emulsion pesticide puts even bottle 50 ℃ together, after 1 hour, be like sedimentary dissolve slowly, show this drug have not invalidation. If sedimentary dissolve very hard or do not dissolve, criterion this medicine already was degenerative invalidation.
5, suspension law: Take but pesticide of wet sex powder 50 grams, put terrarium inside, add water agitate divide evenly, quiet place after 10 minutes, if pesticide dissolvability is poor, the powdery bead of suspension is thick, it is invalidation pesticide namely.
2, be illogical the form of a drug differentiates a method
1, but wet sex powder.
Take but wet sex powder 1, add water 200, fill within glass, still time after shake up, observe suspension condition. If drug precipitation is slow, explain suspension is good. If encounter quality bad situation, organic silicon auxiliary or 0.10% neutral washing powder should be joined before use, in order to increase wet exhibiting a gender. If but wet sex powder sucks current form nugget, unfavorable use as sparge.
2, dust.
If suck tide to agglomerate,dust is in in custodial process, need to be put in air of shady and cool and ventilated place not to want the ability after insolation, pulverize to use, if agglomerate more serious, can do poisonous earth to use only.
3, breast is oily.
Emulsion pesticide is in custodial process, if keep not good at, may appear the following 3 kinds of circumstances.
(1) agglomerate phenomenon. If breed oil already was shown,do not flow liquid of sticky stiff shape or already formed soap state solid body, prove solvent already volatilized for the most part, quality already had change, cannot use.
(2) precipitation crystallization phenomenon. The emulsion that keeps for a long time, bottom ministry can have white crystallization separate out or thick substance appears. If breed its the oily dip that join bottle is in the Wenshui of 30-40 ℃ , its crystallize to be able to be dissolved in 30 minutes or so, restore transparent liquid, explain quality is still good, can use. If cannot be dissolved, show lacteal oily quality already had change, cannot use.
(3) the change of function of lacteal oily emulsification. Oil extraction breed 1, add water 200, put inside glass, shake up hind still is controlled half hours, observe emulsification condition, if superstratum does not have float oil, lower level does not have precipitation, apparent oil is not had among bead, explain emulsification performance is good; If go up,have lacteal oil, there is precipitation below, have after 10 minutes statified phenomenon, show emulsion is destroyed cannot use.
3, the use of pesticide:
1, dust. Dust is not easy dissolve at water, cannot add water sparge commonly, powder of low pH indicator is used for dusting, powder of tall pH indicator uses as make up poisonous earth, poison bait, seed dressing and edaphic processing to wait. Dust is used convenient, work efficiency is tall, appropriate is used when calm of morning and evening or wind-force are faint.
2, but wet sex powder. Hygroscopic strong, after adding water, can disperse or suspension is in water. Can make sparge, poison bait and edaphic processing wait with.
3, solubility powder (water dissolvent) . Can be opposite directly water sparge or spill irrigate.
4, emulsion (also call breast oil) . Emulsion is after emulsion adds water, can use at sparge, spill irrigate, bine of seed dressing, seed soaking, poisonous earth, besmear.
5, exceed small size preparation (fat dose) . It is the drug that uses spray directly, it is the pesticide of special form a complete set that exceeds small size sparge, water cannot be added when using.
6, grain agent and atomic agent. It is the pesticide the form of a drug that makes grain with pesticide former medicine and filler, this kind of the form of a drug produces medicine not easily to kill. Basically use at fill heart leaf, scatter apply, the dot is applied, seed dressing, channel is applied etc.
7, delay commentate agent. The pesticide when using is slow release, can lengthen medical effect effectively period, so, incomplete effect period lengthen, reduce pollution and noxiousness, usage is the same as grain agent commonly.
8, cigarette dose. Cigarette dose is to use agriculture chemical former medicine, fuel, oxidant, support combustion the agent fine noodles or vermicelli made from bean or sweet potato starch that makes or ingot account other people. Vaporization of be heated of pesticide of this kind of the form of a drug, condense into solid particle in air again, form smoke state, basically use ill bug of agriculture of forest of prevention and cure, establishment and storehouse pest.
How to get essence of life to allow farming ability solution?
1, transmit this article + dot assist.
3, in the head date homepage, find illicit letter function, illicit letter is small make up [agrotechnical] .
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Reference material:
" if appear to say with next circumstances pesticide is degenerative already " Chinese pesticide net
" expire can be pesticide used? Whether degenerative invalidation judges pesticide " net of the first farming classics
" how to discern whether did pesticide already deteriorate " Yangzhou city Shan Yang presses down community to teach a center
