Netherlands Journal of Plant Pathology

, Volume 93, Issue 6, pp 245–252 | Cite as

Pathogenicity of Fusarium solani f.sp. cucurbitae race 1 to courgette

  • S. J. Paternotte
Article

Abstract

Fusarium solani f. sp.cucurbitae race 1 causes foot rot in courgette (Cucurbita pepo). The pathogen could be distinguished fromFusarium solani from sweet pepper (Capsicum annuum) both morphologically and in its host range.

In inoculation experiments all nine cultivars of the six species of Cucurbitaceae tested were susceptible. Courgette ‘Green’ became diseased after inoculation with a spore suspension by root dipping or adding the suspension to the soil around the stem base or spraying the whole plant with it.

Both wounded and young plants died more quickly than unwounded and older plants. With low inoculum densities the plants were affected more slowly than with high densities and the differences in susceptibility of the Cucurbitaceae tested were more pronounced.

From infected courgette seeds the fungus could be reisolated until 6 months after harvest.

This is the first record of this pathogen in courgettes in the Netherlands.

Samenvatting

Fusarium solani f. sp. cucurbitae fysio 1 is de oorzaak van een voetrot in courgette. Het pathogeen is morfologisch en door middel van een waardplantenreeks goed vanF. solani uit paprika te onderscheiden.

In inoculatieproeven waren de getoetste Cucurbitaceae in meer of mindere mate gevoelig voorF. solani f. sp.cucurbitae. Bij courgette ‘Green’ werden zowel gedompelde, als aangegoten, als bespoten planten door het pathogeen aangetast. Zowel verwonde als niet-verwonde planten werden aangetast als ook planten van verschillende leeftijden. Niet-verwonde en ook oudere planten stierven minder snel af dan verwonde en jongere planten. Bij lagere inoculumdichtheden werden de planten minder snel aangetast dan bij hogere dichtheden en waren de verschillen in vatbaarheid voor het pathogeen tussen de getoetste Cucurbitaceae duidelijker.

Uit courgette zaad, dat met het pathogeen was besmet, kon de schimmel tot 6 maanden na zaadwinning opnieuw worden geïsoleerd.

Dit is de eerste melding van dit pathogeen in courgette in Nederland.

Additional keywords

Cucurbita pepo seed infection 

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Copyright information

© Koninklijke Nederlandse Planteziektenkundige Vereniging 1987

Authors and Affiliations

  • S. J. Paternotte
    • 1
  1. 1.Glasshouse Crops Research StationNaaldwijkthe Netherlands

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