Control of tuber diseases, especially gangrene, with benomyl, thiabendazole and other fungicides

Observations on Potato Disease Incidence Following Soil Application of a Granular Fungicide‐Bactericide at Planting

“…These results contrast with those of French (1973), Hide et al (1969), Copeland and Logan (1975) and Smith (1975) who found reductions in the incidence of skin spot, silver scurf, black scurf but not gangrene in the progeny of seed tuhers dusted with either benomyl or thiabendazole. Hide (1974) and Jellis and Taylor (1977) reported that benomyl and thiabendazole inhibited the production of spores of P. pustulans and H. solani on the surface of dusted seed tubers.…”

“…Lack of disease control in the present trials may be explained by the fact that, as in the trials of Logan (1974), only the surrounding soil received fungicidal granules and therefore tuber-borne inoculum was not totally inactivated. Furthermore, the equivalent concentration of thiahendazole in Byatran applied to the soil in these trials was at least 50 per cent less than that applied as tuber dusts in the trials of Hide et al (1969), Smith (1975 and Copeland and Logan (1975 Traps containing a sex attractant of the pea moth (Cydia nigricana (F.)) and placed in pea fields at 16 sites in south-eastern and eastern England provided records of male moths caught every two or three days from the end of May to the beginning of July, 1976. These traps indicated the arrival of pea moths in the crop considerably earlier than did the traditional egg counts.…”

Emergence of silver scurf (Helminthosporium solani) as an economically important disease of potato

“…Silver scurf on tubers can be reduced by the systemic broad‐spectrum fungicide TBZ and, since the early 1970s, TBZ has been widely used as a postharvest treatment on potatoes (Hide et al ., 1969a, 1980, 1988; French, 1973; Copeland & Logan, 1975; Cayley et al ., 1979; Hide, 1986). TBZ is of low toxicity and has the capacity to prevent/control the onset of silver scurf for several months, with no effect on quality or retention of residues (Hide et al ., 1969a; Hide & Read, 1985).…”

Parch srebrzysty (Helminthosporium solani) – objawy i zwalczanie

“…2007). Jako czynnik obniżający efektywność działania zastosowanych Copeland, Logan (1975) Tolylfluanid/tolylfluanid zaprawianie bulw/ seed dressing skutecznie/ effectively Wainwright i in. (1996) fungicydów podaje się także, na przykładzie fludioksonilu i mankozebu, brak mobilności stosowanych substancji aktywnych i wynikającą z tego możliwość atakowania bulw przez inokulum glebowe.…”