Caij nplooj ntoos hlav los.Nyob zoo cov phooj ywg ua liaj ua teb, koj puas npaj txhij rau lub caij nplooj ntoos hlav ploughing?Koj puas tau npaj siab rau kev tawm los?Txawm koj cog dab tsi los xij, koj yeej tsis tuaj yeem tau txais tshuaj tua kab.Koj puas tau ntsib cov xwm txheej zoo li no ob qho tib si siv tshuaj tua kab tua kab lossis tiv thaiv kab mob, qee tus neeg tuaj yeem tau txais txiaj ntsig sai thaum lwm tus tsis zoo.
Raws li qhov teeb meem no, tej zaum koj yuav tau nkag mus rau peb lub minefields - xaiv cov tshuaj tua kab tsis raug, siv tshuaj tua kab tsis raug, thiab sib tov tshuaj tua kab tsis raug.Muaj ntau cov ntsiab lus uas yooj yim yuav tsis quav ntsej hauv cov minefields.Los saib seb koj puas yog?
Minefield 1 - xaiv cov tshuaj tua kab tsis raug
Txhawm rau kom tsis txhob xaiv cov tshuaj tua kab tsis raug, cov phooj ywg ua liaj ua teb yuav tsum tau ua tib zoo saib xyuas cov khoom hauv qab no - txheeb xyuas cov tshuaj tua kab tiag tiag, kev sib hloov tshuaj tua kab, thiab muab tshuaj tshwj xeeb rau tus kab mob!
1. txheeb xyuas cov tshuaj tua kab tiag tiag
Yuav cov tshuaj tua kab cuav lossis cov tshuaj tua kab tsis zoo, nws yog qhov tseeb tias yuav tau txais txiaj ntsig tsis zoo thiab yuav ua rau poob loj.Tom qab ntawd puas muaj kev txawj yuav tshuaj tua kab tiag?
Ua ntej tshaj plaws, thaum yuav cov tshuaj tua kab peb yuav tsum pom kom meej txog daim ntawv lo, daim ntawv pov thawj, thiab hnub tim ntawm lub pob.Sim mus yuav cov tshuaj tua kab uas tsim los ntawm cov tuam txhab loj.Thiab mus rau cov khw muag khoom siv ua liaj ua teb nrog lub koob npe nrov, kev paub txuj ci thiab kev ua haujlwm tau zoo.
2. Kev hloov tshuaj tua kab
Cov khoom siv tshuaj tua kab zoo yuav tsum tau siv rau hauv kev sib hloov.Tsis muaj teeb meem dab tsi ntawm cov qoob loo, siv cov tshuaj tua kab ib zaug lossis ntev siv tib lub sijhawm lossis ntau yam tshuaj tua kab uas muaj cov yam ntxwv zoo ib yam yuav txhim khu kev tiv thaiv ntawm cov kab tsuag thiab txo cov nyhuv tswj.Kev siv lwm cov khoom siv lossis cov tshuaj tua kab sib xyaw tuaj yeem txo qhov kev pheej hmoo ntawm cov tshuaj tiv thaiv.
3. Yuav tshuaj tua kab raws li cov tsos mob
Qee tus neeg nyiam ua raws li thaum yuav cov tshuaj tua kab yam tsis tau kuaj xyuas seb nws puas yog tib yam kab tsuag lossis kab mob.Lawv tsuas yog ua raws li kev yuav khoom uas lwm tus yuav, thiab hloov mus rau lwm tus lossis ntxiv lwm yam khoom yog tias cov nyhuv tsis zoo.Yog li ntawd, tshuaj tua kab thiab kab mob tsis sib xws.Tsis txhob tiv thaiv kab mob los yog kab tsuag, los yog ncua lub sij hawm zoo tshaj plaws ntawm kev tiv thaiv thiab tswj.Thiab yuav muaj tshuaj lom neeg.
Yog li, kawm ntxiv thiab pom ntau ntxiv, loj hlob koj tus kheej-qhov muag.Ua ntej kuaj cov kab tsuag lossis kab mob, tom qab ntawd mus rau cov tuam txhab tsim khoom lossis cov khw muag khoom ua liaj ua teb xaiv cov khoom tshwj xeeb!
Minefield 2 - Kev siv tsis raug
Kuj tseem muaj qhov teeb meem yooj yim kom tsis quav ntsej-tsim nyog collocation ntawm additives.Kev nqus sab hauv, permeability thiab conductivity ntawm cov tshuaj tua kab muaj kev cuam tshuam zoo rau kev siv.Tsim nyog collocation ntawm additives yog conducive rau cov nyhuv ntawm cov tshuaj tua kab.
1. Mechanism ntawm kev nqus sab hauv
Tshuaj tua kab yog absorbed rau hauv cov nroj tsuag los ntawm cov hauv paus hniav, stems, nplooj thiab noob, thiab dispersed thiab kis mus rau hauv, kom lawv khaws cia rau ib lub sij hawm ntawm lub sij hawm, los yog tsim tshuaj tua kab metabolites nrog muaj zog insecticides.Kab tsuag tuag thaum lawv pub rau cov nroj tsuag tshuaj los yog kua txiv hmab txiv ntoo.
2. Permeation mechanism
Cov tshuaj tua kab nkag mus los ntawm txheej txheej (cuticle) ntawm cov nroj tsuag.Cov txheej txheem ntawm kev nkag mus tau yooj yim muab faib ua qhov nkag mus rau hauv cuticle thiab penetrating stoma, thiab feem ntau ntawm lawv yog thawj hom.
Thaum cov tshuaj tua kab tsuag tsuag rau saum npoo ntawm cov qoob loo los yog kab tsuag, cov quav ciab txheej ntawm cov qoob loo thiab cov kab tsuag ua rau nws nyuaj rau cov tshuaj tua kab kom nkag mus rau hauv thiab ua raws, yog li cov kua tshuaj tua kab poob thiab kev ua haujlwm tau zoo heev.Yog li ntawd, lub wettability thiab permeability ntawm kev npaj tshuaj tua kab tom qab dej dilution muaj kev cuam tshuam zoo rau kev ua tau zoo.Ib txoj hauv kev los txhim kho qhov ua tau zoo yog siv cov surfactants nrog zoo ntub dej thiab permeability.
Kev siv cov tshuaj ntxiv kom raug tuaj yeem muab kev ua si tag nrho rau kev ua tau zoo ntawm cov tshuaj tua kab, tsis tsuas yog txhim kho kev siv tshuaj tua kab, tab sis kuj txo cov pa phem rau ib puag ncig, tiv thaiv huab cua tsis zoo ntawm daim ntawv thov, thiab txhim kho kev ua tau zoo.Piv txwv li, rau cabbage, scallion thiab lwm yam waxy zaub, kua tshuaj tua kab yog yooj yim rau ntws.Ntxiv silicone, txiv kab ntxwv tev cov roj tseem ceeb, Bayer dichloride, thiab lwm yam hauv cov kua, cov nyhuv zoo heev.
Raws li cov tshuaj tua kab pyrethroid uas tau sau npe ntau tshaj plaws, Bayer dipyridamole yooj yim siv thiab muaj kev nyab xeeb zoo heev;tib lub sijhawm, nws tuaj yeem tiv thaiv thiab tswj cov kab loj thiab me;nws yog kev lag luam thiab muaj qhov sib piv ntawm cov tswv yim-tso tawm;nws muaj cov nyhuv synergistic thaum sib xyaw nrog lwm cov tshuaj tua kab;nws muaj zog permeability thiab tuaj yeem tsoo cov kab tsuag sai sai!
Minefield 3 - Kev siv tsis raug
Nws yog qhov tseem ceeb ntawm lub sijhawm thiab cov txheej txheem ntawm kev thov.
1. Lub sijhawm thov tsis raug
Ntau tus neeg cog qoob loo tsis siv tshuaj tua kab kom txog thaum muaj kab mob thiab kab tsuag loj heev.Piv txwv li, lub sijhawm zoo tshaj plaws los tswj Pieris rapae yog siv cov tshuaj tua kab ua ntej lub hnub qub thib ob ntawm cov larvae, thaum qee tus neeg ua liaj ua teb tsuas yog siv tshuaj tua kab thaum Pieris rapae tau loj hlob mus rau hnub nyoog laus.Lub sijhawm no, kev puas tsuaj ntawm Pieris rapae tau cuam tshuam kev loj hlob ntawm cov nroj tsuag thiab ua rau poob.
2. Txoj kev thov tsis raug
Qee tus neeg cog qoob loo txhawj xeeb tias kev tswj xyuas tsis zoo, yog li lawv nce qhov ntau npaum li cas.Lawv xav tias qhov ntau npaum li cas thiab ntau lub sij hawm lawv siv, qhov kev tswj tau zoo dua yuav zoo dua.Qhov no yuav tsis tsuas yog ua rau cov tshuaj tua kab ntau dhau, tab sis kuj txhim khu kev tiv thaiv kab mob thiab kab tsuag.Qhov tseem ceeb tshaj, nws yog ib qho yooj yim heev ua rau cov tshuaj tua kab puas tsuaj.
Txhawm rau txuag kev ua haujlwm, qee tus neeg dig muag sib xyaw txhua yam ntawm fungicides, tshuaj tua kab, foliar fertilizer, cog kev loj hlob regulators thiab hais txog.Lawv xav tias ntau cov tshuaj tua kab sib xyaw, qhov kev tswj xyuas zoo dua.Yog li ntawd, cov qoob loo tau txais tshuaj tua kab puas tsuaj thiab cov neeg ua liaj ua teb tau poob.
Yog li ntawd, peb yuav tsum siv cov tshuaj tua kab raws li cov tshuaj tau sau tseg, txoj kev, zaus thiab kev nyab xeeb.
Post lub sij hawm: Dec-16-2021