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Ciudad Universitaria, Spain

Echevarria P.H.,Horticultura EUITA | Rodriguez B.G.,Horticultura EUITA
Acta Horticulturae | Year: 2012

Cucumber is the most cultivated vegetable in Central Spain greenhouses (Madrid and surrounding areas).Farmers grow cucumber repeatedly on the same soil because they do not have much surface available, so it was a normal practice to disinfect greenhouses with methyl bromide. Since methyl bromide was forbidden, it has been necessary to use other alternatives to continue growing cucumbers in central Spain. Grafting is one of the most promising techniques, and it has been used successfully in these areas not only to overcome soil problems (nematodes mainly), but also to improve yield and quality. The rootstocks used so far (hybrids of Cucurbita maxima × Cucurbita moschata) present no resistance to nematodes, so the aim of the study was to evaluate if soil steam disinfection would complement the use of rootstocks. Two steam disinfection methods were evaluated: sheet steaming and steaming hoods. In both cases soil was steamed for about two hours at 80-85°C down to 35 cm depth. Cucumber cultivar tested was 'Trópico', grafted onto commercial rootstock Shintoza (Cucurbita maxima × Cucurbita moschata) and watermelon rootstock Robusta (Citrullus lanatus). Grafting allowed significant increases in production. Higher yield was obtained with Shintoza (almost 44.5 kg.m-2), 33% more than yield obtained with Robusta and 50% more than non-grafted plants. Steam disinfection did not improve yield, even with non-grafted plants. Plants grafted onto Shintoza produced 285 fruits.m-2, 47% more cucumbers than non-grafted plants, and these cucumbers had the highest weight, 156 g. Source


Echevarria P.H.,Horticultura EUITA | Martinez G.R.,Horticultura EUITA | Rodriguez B.G.,Horticultura EUITA
Acta Horticulturae | Year: 2012

In Villa del Prado (Madrid) the most important crop in spring-summer cycles is cucumber, but in recent years tomato has become an interesting alternative increasing its growing surface. Vegetable grafting is one of the most promising techniques to overcome soil-borne diseases, but it can also be used to improve yield and fruit quality. Two of the most cultivated tomato cultivars in Central Spain are 'Caramba' and 'Tavira'. These cultivars were grafted onto two hybrid rootstocks (Heman and Multifort) to evaluate their behaviour. Production obtained with Multifort was 22% higher than yield obtained with non-grafted plants: 18.23 and 14.94 kg.m-2, respectively. Yield from both cultivars was improved when grafting, 24% in 'Tavira' and 20% in 'Caramba'. Tomatoes from grafted plants were bigger than those from non-grafted plants. Grafting reduced total soluble solids from 5.13°Brix in non-grafted plants to 4.83°Brix (6% less) when grafted onto Heman, and 4.59°Brix (12% less) when grafted onto Multifort. Fruit acidity, juiciness and dry matter content were reduced by grafting, while fruit firmness was improved. Source

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