Copper, Dithiocarbamates and Organotin Compounds for the Control of Potato Blight, 1962?65
1967; Wiley; Volume: 16; Issue: 2 Linguagem: Inglês
10.1111/j.1365-3059.1967.tb00363.x
ISSN1365-3059
AutoresR. H. Jarvis, J. L. Short, F. E. Shotton,
Tópico(s)Plant Disease Resistance and Genetics
ResumoSUMMARY Trials from 1962–65 at Terrington E.H.F. compared copper oxychloride with other fungicides for the control of potato blight in ‘King Edward’. In two of the four years copper oxychloride gave little or no increase in yield over control. In all years higher yields were obtained from the use of other fungicides (which on all occasions gave positive yield increases over control) except in 1963 when a copper‐maneb spray was very slightly inferior to copper oxychloride. The superior performance of the newer fungicides was not due to better control of foliage blight but to reduced phytotoxicity and, whereas total yield cannot be simply related to the efficacy of foliage blight control, in the 1965 trial good agreement is demonstrated between total yield and haulm death from all causes. Maneb and mancozeb caused no apparent scorch but did not control tuber blight as well as copper. Fentin hydroxide caused appreciable scorch in the presence of aphids but gave outstanding control of tuber blight in 1965.
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