Relative value and mode of action of some fungicides used as seed disinfectants and protectants

A.S. Samra

Research output: Thesisinternal PhD, WU

Abstract

The first part of this paper deals with investigations at the Phytopathological Laboratory, Wageningen, into the control of Alternaria spp. (mainly A . raphani) on radish seed by chemicals. Organic mercury compounds proved better than thiram products and were more effective wet than as dusts, ceresan and germisan wet treatments being the best (99 % control) and, as 1 % for 4 to 8 min., not phytotoxic.

The fungus was able to penetrate to the interior of the seed and may thus prevent germination. The fungicidal effect of ceresan increased when seed was stored up to 32 days after treatment, but the phytotoxic effects were also greater.

Of the antibiotics tested, some had no effect, and actidione, though giving control, proved too phytotoxic. Rimocidin at 200, 400 or 800 p.p.m. for 16, 8, and 4 h respectively, was more effective; at 400 p.p.m. for 30 h it eliminated deep-seated infection without injury to the seed and in this was superior to ceresan.

The second part deals with the relative value of thiram and mercurials as seed protectants against unspecified soil fungi. In cold tests with maize seed (germination in unsterilized field soil at low temperature) arasan SF-X at 0.2 to 0.3 % was the most effective of the thiram products and was less phytotoxic and more persistent than ceresan-new.

Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • Wageningen University
Supervisors/Advisors
  • Oort, A.J.P., Promotor
Award date25 May 1956
Place of PublicationWageningen
Publisher
Publication statusPublished - 1956
Externally publishedYes

Fingerprint

disinfectants
fungicides
mechanism of action
thiram
seeds
organomercury compounds
soil fungi
Alternaria
radishes
dust
seed germination
antibiotics
germination
fungi
corn
infection
soil
temperature
testing

Keywords

  • plant protection
  • fungicides
  • seed treatment
  • seeds
  • disinfection

Cite this

@phdthesis{c0e91acfbdbd426f85028f57544a7c74,
title = "Relative value and mode of action of some fungicides used as seed disinfectants and protectants",
abstract = "The first part of this paper deals with investigations at the Phytopathological Laboratory, Wageningen, into the control of Alternaria spp. (mainly A . raphani) on radish seed by chemicals. Organic mercury compounds proved better than thiram products and were more effective wet than as dusts, ceresan and germisan wet treatments being the best (99 {\%} control) and, as 1 {\%} for 4 to 8 min., not phytotoxic.The fungus was able to penetrate to the interior of the seed and may thus prevent germination. The fungicidal effect of ceresan increased when seed was stored up to 32 days after treatment, but the phytotoxic effects were also greater.Of the antibiotics tested, some had no effect, and actidione, though giving control, proved too phytotoxic. Rimocidin at 200, 400 or 800 p.p.m. for 16, 8, and 4 h respectively, was more effective; at 400 p.p.m. for 30 h it eliminated deep-seated infection without injury to the seed and in this was superior to ceresan.The second part deals with the relative value of thiram and mercurials as seed protectants against unspecified soil fungi. In cold tests with maize seed (germination in unsterilized field soil at low temperature) arasan SF-X at 0.2 to 0.3 {\%} was the most effective of the thiram products and was less phytotoxic and more persistent than ceresan-new.",
keywords = "gewasbescherming, fungiciden, zaadbehandeling, zaden, desinfectie, plant protection, fungicides, seed treatment, seeds, disinfection",
author = "A.S. Samra",
note = "WU thesis 206 Proefschrift Wageningen",
year = "1956",
language = "English",
publisher = "Veenman",
school = "Wageningen University",

}

Samra, AS 1956, 'Relative value and mode of action of some fungicides used as seed disinfectants and protectants', Doctor of Philosophy, Wageningen University, Wageningen.

Relative value and mode of action of some fungicides used as seed disinfectants and protectants. / Samra, A.S.

Wageningen : Veenman, 1956. 58 p.

Research output: Thesisinternal PhD, WU

TY - THES

T1 - Relative value and mode of action of some fungicides used as seed disinfectants and protectants

AU - Samra, A.S.

N1 - WU thesis 206 Proefschrift Wageningen

PY - 1956

Y1 - 1956

N2 - The first part of this paper deals with investigations at the Phytopathological Laboratory, Wageningen, into the control of Alternaria spp. (mainly A . raphani) on radish seed by chemicals. Organic mercury compounds proved better than thiram products and were more effective wet than as dusts, ceresan and germisan wet treatments being the best (99 % control) and, as 1 % for 4 to 8 min., not phytotoxic.The fungus was able to penetrate to the interior of the seed and may thus prevent germination. The fungicidal effect of ceresan increased when seed was stored up to 32 days after treatment, but the phytotoxic effects were also greater.Of the antibiotics tested, some had no effect, and actidione, though giving control, proved too phytotoxic. Rimocidin at 200, 400 or 800 p.p.m. for 16, 8, and 4 h respectively, was more effective; at 400 p.p.m. for 30 h it eliminated deep-seated infection without injury to the seed and in this was superior to ceresan.The second part deals with the relative value of thiram and mercurials as seed protectants against unspecified soil fungi. In cold tests with maize seed (germination in unsterilized field soil at low temperature) arasan SF-X at 0.2 to 0.3 % was the most effective of the thiram products and was less phytotoxic and more persistent than ceresan-new.

AB - The first part of this paper deals with investigations at the Phytopathological Laboratory, Wageningen, into the control of Alternaria spp. (mainly A . raphani) on radish seed by chemicals. Organic mercury compounds proved better than thiram products and were more effective wet than as dusts, ceresan and germisan wet treatments being the best (99 % control) and, as 1 % for 4 to 8 min., not phytotoxic.The fungus was able to penetrate to the interior of the seed and may thus prevent germination. The fungicidal effect of ceresan increased when seed was stored up to 32 days after treatment, but the phytotoxic effects were also greater.Of the antibiotics tested, some had no effect, and actidione, though giving control, proved too phytotoxic. Rimocidin at 200, 400 or 800 p.p.m. for 16, 8, and 4 h respectively, was more effective; at 400 p.p.m. for 30 h it eliminated deep-seated infection without injury to the seed and in this was superior to ceresan.The second part deals with the relative value of thiram and mercurials as seed protectants against unspecified soil fungi. In cold tests with maize seed (germination in unsterilized field soil at low temperature) arasan SF-X at 0.2 to 0.3 % was the most effective of the thiram products and was less phytotoxic and more persistent than ceresan-new.

KW - gewasbescherming

KW - fungiciden

KW - zaadbehandeling

KW - zaden

KW - desinfectie

KW - plant protection

KW - fungicides

KW - seed treatment

KW - seeds

KW - disinfection

M3 - internal PhD, WU

PB - Veenman

CY - Wageningen

ER -