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    [Alliage, a new fungicide against apple and pear scab and powdery mildew [kresoxim-methyl]]
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    On a etudie la lutte contre l'oidium du pommier et les effets sur la tavelure, la pourriture des fruits et le feuillage de six associations de fongicides: nitrothal-isopropyl+polyrame, triadimefon+captane, myclobutanil+captane, myclobutanil+mancozebe, nuarimol+mancozebe et penconazole
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    Microemulsion (ME) and emulsifiable concentrate (EC) formulations of fenarimol were equally effective in greenhouse trials in controlling apple scab (caused by Venturia inaequalis) when applied 48, 72, 96, or 120 hr after inoculation. The percent of surface area affected with chlorotic and sporulating lesions did not differ significantly between the two formulations at 10, 20, or 30 μg a.i./ml
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    Abstract A 3‐year field trial was conducted using established apple cv. Crown Gold and English oak ( Quercus robur L.) to assess the efficacy of eight fungicides applied via microcapsule trunk injection against the foliar pathogens apple scab ( Venturia inaequalis ) and powdery mildew ( Phyllactinia sp). In both apple cv. Crown Gold and English oak, the fungicide myclobutanil was not taken up when microcapsules were inserted into the tree vascular system at the root flare. Disease severity in injected trees, excluding myclobutanil, was lower over the following two growing seasons compared to water‐injected controls indicating seven of the eight fungicides used in this study provided a significant degree of protection against scab and powdery mildew infection. A difference in the magnitude of pathogen control achieved was recorded between fungicides. Of the fungicides tested, penconazole, pyrifenox and carbendazim significantly reduced disease severity and significantly increased leaf chlorophyll (Fv/Fm) and SPAD values as a measure of tree vitality and chlorophyll content, respectively, in both apple cv. Crown Gold and English oak over two growing seasons after microcapsule injection. Based on the results of this investigation, it is suggested that these three fungicides be used in preference to thiabendazole, fosetyl‐aluminium, triadimefon and propiconazole for the control of apple scab and powdery mildew where outbreaks of these foliar pathogens are problematic.
    Myclobutanil
    Apple scab
    Propiconazole
    Venturia inaequalis
    Triadimefon
    Chlorothalonil
    Quercus robur