The effectiveness of different fungicides containing mancozeb in reducing development of early blight in field and laboratory investigations
Jerzy Osowski
j.osowski@ihar.edu.plZakład Nasiennictwa i Ochrony Ziemniaka w Boninie, Instytut Hodowli i Aklimatyzacji Roślin w Radzikowie (Poland)
Abstract
In the years 1999 and 2001–2003, the efficiency of different fungicides in controlling early blight was evaluated in field and laboratory experiments. Two contact fungicides: mancozeb (Dithane NeoTec 75 WG and zoxamide + mancozeb (Unikat 75 WG), a translaminar fungicide fenamidon + mancozeb (Pyton 60 WG) and a systemic fungicide metalaxyl M + mancozeb (Ridomil Gold MZ 68 WG) were compared. The results showed that all tested fungicides significantly reduced early blight development in the field trials. The control of early blight resulted in the increase of potato yield by 4.8 t/ha (metalaxyl M + mancozeb) to 6.2 t/ha (zoxamide + mancozeb). In the laboratory experiments only mancozeb and fenamidon reduced the development of Alternaria alternata fungus.
Keywords:
Alternaria solani, Alternaria alternata, active ingredient, early blight, chemical controlReferences
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Authors
Jerzy Osowskij.osowski@ihar.edu.pl
Zakład Nasiennictwa i Ochrony Ziemniaka w Boninie, Instytut Hodowli i Aklimatyzacji Roślin w Radzikowie Poland
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