Screening strawberry plant resistance to Phytophthora cactorum with two techniques

P. cactorum infects runner plants in the NFT system fairly quickly, the first symptoms becoming visible in three to five days in susceptible cultivars. Most of the tested cultivars showed the same level of resistance in both tests

The effect of irrigation method on the quality and shelf-life of strawberry fruit in organic production

The irrigation method did not affect either the shelf-life or the quality of fruit. In organic strawberry production grey mould is a major problem. Strawberry varieties differ from each other in disease susceptibility and the quality and shelf-life of the fruit is affected more by their properties and weather conditions than by the irrigation method

'Suvetar' and 'Valotar' - new strawberry cultivars

The strawberry (Fragaria × ananassa) cultivars ‘Suvetar’ and ‘Valotar’ have been released from the breeding programme of MTT Agrifood Research Finland. Both new cultivars overwintered as well as the control cultivars ‘Jonsok’ and ‘Polka’. ‘Suvetar’ overwintered even better than ‘Polka’. ‘Suvetar’ was produced from the cross ‘Polka’ × ‘Emily’. It scored better than the control cultivars for sensory assessed skin resistance. Measured fruit firmness of ‘Suvetar’ was not significantly different from that of ‘Polka’, but was better than ‘Jonsok’. ‘Valotar’ originates from a cross between ‘Jewel’ and ‘Senga Sengana’. Its measured fruit firmness was better than that of ‘Jonsok’ and ‘Polka’. Considering sensory assessments, the good firmness seems to be largely due to good skin resistance. The fresh flavour, yield, fruit size and fruit appearance of ‘Suvetar’ and ‘Valotar’, together with improved fruit firmness, make both the new varieties suitable for the fresh fruit market

Taudit kulkevat taimien mukana mansikkaan

Maahamme on tuontitaimien mukana pyrkimässä mansikan vaarallinen tauti, mustalaikku. Melko yleisenä taimissa kulkee myös kasveja kuihduttavaa mansikan tyvimätää. Sen seurauksena nahkamätä voi lisääntyä mansikkaviljelmillä ja aiheuttaa laatuongelmia. Taudit voivatkin olla riski kannattavuusongelmista kärsivälle mansikantuotannolle.vo

Taudit kulkeutuvat taimien mukana mansikkaan

Suuri osa suomalaisista mansikkaviljelmistä perustetaan nykyään ulkomaisilla ostotaimilla. Taimien mukana maasta toiseen kulkeutuu myös kasvintuhoojia, kuten mansikan mustalaikku ja tyvimätä. Kiusallisilta taudeilta voidaan välttyä käyttämällä tervettä ja testattua taimimateriaalia.vo

Porkkanan varastotaudit ajoissa selville

Porkkanan varastotautien runsautta ja niiden aiheuttamia satotappiota voidaan ennakoida noston jälkeen varastotestillä. Jos testi osoittaa tärkeimmän pilaajan, mustamädän, vioittavan juureksia, sato kannattaa markkinoida aikaisin. Mustamädän testaus onnistuu porkkananpaloilla myös suoraan viljelymaasta.vo

The effect of different mulches on yield, fruit quality and strawberry mite in organically grown strawberry

An organic strawberry field experiment was started in 2000 at MTT Ecological Production in Mikkeli to study the influence of mulching materials on the growth, yield, microbiological fruit quality and strawberry mite. Mulching materials are black plastic, flax fibre mat, green mass, barley straw, buckwheat husk as well as pine and birch woodchips

Colletotrichum acutatum: survival in plant debris and infection on alternate hosts

The survival of Colletotrichum acutatum in infected plant material was studied in two trials: one in 2002-2003 and another in 2003-2005 with artificially infected strawberry leaves, crowns and berries

Viljan tyvitautien esiintyminen Etelä-Suomessa vuosina 1975-1978

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Bekämpning av bladsjukdomar inom ekologisk vinbärsodling är en utmaning

På försöksstationen i S:t Michel inom MTT undersöktes bekämpningen av bladsjukdomar i ekologiska vinbärsodlingar under åren 1999-2001 på vita vinbär och år 2001 också på röda vinbär. Man fann ingen effekt av nässelvatten mot bladsjukdomar på vinbär. Kompostvatten tycktes ha en viss förebyggande effekt