Zeama bordeleza
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Zeama bordeleza

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    Zeama bordeleza Zeama bordeleza Document Transcript

    • Zeama bordeleza este o substanta de combatere a bolilorcare se prepara foarte usor in gospodarie astfel: pentru oconcentratie uzuala de 0,75-1%, la 100 litri apa sefoloseste 1 kg piatra vanata (sulfat de cupru), care seneutralizeaza cu var nestins in proportie de 2:1 (0,5 kg),sau var stins (pasta) in raport de 1:1 sau 1:2; piatravanata se dizolva in apa calda cu o zi inainte; solutiile depiatra vanata si de var se prepara separat; dupadizolvare, solutiile se amesteca si se adauga apa pana la100 litri solutie. Este important ca zeama bordeleza saaiba o reactie neutra sau slab alcalina, verificand cuhartia de turnesol care trebuie sa se albastreasca. Dacanu se intampla acest lucru, se mai adauga lapte de var.Prepararea trebuie facuta numai in vase de lemn sausmaltuite, si nu in vase de metal. Solutia nu trebuiepastrata prea mult timp, cel mult de la o zi la alta.