A, Do a good job ofs prevention job
Winter low temperature in greenhouse, High wet environmental condition, Benefits to many kinds plant diseases and insect pestses s take place fashion, But plant diseases and insect pests once takes place, Single chemistry medicament prevent and cure very difficult effective control it take place with contagion, Must many kinds meanses combine exertion, These meanses include:
1. Agricultural method: Reasonable work by turns rotation of crops, Graft, Adopts disease-resistant worm breed.
2. Biology means: Scientific reasonable use antibiotic drug grade streptomycin, Neats white.
3. Physics means: Will be like use 50 ¡« 55 ¡æ s water seed soaking, High temperature frowsts booth, Takes advantage of yellow board glue glue trap and kill aphid, Ceruse , America spot hide fly.
Want will above three kinds of meanses with chemistry medicament prevent and cure compose a synthesis plant diseases and insect pests prevent and cure system, And as prevent give first place to. From inseminate start, Be going to prevents stand withered, Sudden falls wait for disease; Prevents aphid, Roots close eelworm wait for insect pest.
Two, Reasonable rotates use pesticide
Smoke dosage, Butter, Can wet sex medicinal powder different the form of a drug (e. g. liquid, powder, pill) pesticide want rotate usage, Wants try the best use smoke dosage under cloudy situation; Disinfect dosage, In suck dosage ( Many germ manes, Methyl hold in the palms cloth Chin, Gram dew) With protection dosage ( Hundred germ Qing Dynasty, Takes place forest violent Zn, Happiness beauty double) Waits for effect mechanism different pesticide, Also wants rotate usage. For example in view of insects egg and pupa, Can adopt touch kill sex ( High power chlorine hydrogen chrysanthemum ester, First chrysanthemum ester) And stifling sex ( DDVP) Medicament extinguishes, Ins view of different categorys nympha or imaginal, Can choose in suck sex, Touch kill sex, Stomach toxicity, Stifling sex and hasten avoid sex insecticide come prevention and cure. Chemical composition different pesticide also want reasonableness rotate usage.
Three, Scientific adopts pesticide, Scientific mixes match pesticide
Popularized use mix drug grade pesticide already were people recognition, But at is engaged also exist a lot of problems. Be like some will ingredient same name different pesticide mix match, Some 45 kinds of even 67 kinds of pesticides mix together, Aboves mix match means not only result in waste, And pollutes environment, Also easy bring forth medicine trouble and accelerate drug-fast form.
Mixes match pesticide must know pesticides characteristic, And science mixes match talent promote action of drugs s exert, Be like will the enemy kills and joy fruit, Sanhuan wait for not alkaline pesticide mix use can enhance prevent effect, And delays drug-fastness bring forth; Quick go out kill man and joy fruit and take place forest violent Zn mix use can alleviate pest to it s drug-fastness. But acidity pesticide can not with alkaline pesticide mix use, Is like time and energy expended on work, Go out sweep benefit, Suffering sulphur phosphorus can not with Bordeaux mixture and lime sulfur mix use; Some pesticide definitude markly clearly can not with copper drug grade mix use, Is like sulfur, Takes place forest manganese Zn, Happiness beauty double, Quits germ very, Many germ good. Meanwhile copper drug grade can not with strong alkaline drug grade mix use, And be jealous of will copper drug grade solvent s PH worth transfer go 6 below, Because this will bring forth huge amount of can come into adult plant; s copper and other impurity metal ion in fruit entity, To adult plant composes medicine trouble. Insecticide mixes match ordinary as two kinds of is good, Will disinfect as 2 ¡« 3 kinds of mix match be good, This can reach economy effective aim.
Author unit: Daan market dragon natural pond town agriculture information service station
Pick from: Village scientific experiment 2007.02 |
