Grafting peppers on Romanian rootstocks as a method to prevent soilborne diseases and nematodes
Soilborne pathogens and nematodes are very destructive in vegetable crops and one of the most limiting factors to the farmers income. From this point of view, crop rotation is important for preventing infestation with soilborne diseases and pests. However, crop rotation is rarely practiced in greenhouse production, which allows soilborne pathogens and pests to accumulate, progressively reducing crop yields. Soil fumigation with methyl bromide was the most effective fumigant for controlling nematodes, weeds, pathogens, insects, and rodents and has been an essential method used in greenhouses since the 1960s. Growing vegetables without soil fumigants has remained a challenge, in part because commercially acceptable pepper cultivars produced through conventional breeding lack resistance to many soilborne plant pathogens. Research that started in 2002 has identified non-chemical alternatives that are suitable for conditions in Romania. Grafting cultivars with high quality and high productivity on rootstocks that are resistant to soil pests and diseases is a method that has been known for years, but that has recently been improved and has quickly spread since then. The objective of this research was to evaluate the performance of some new Romanian pepper rootstocks. Data obtained from grafted pepper (scion/rootstock) transplanted in soil that has not been disinfested were compared with data from not grafted peppers. The frequency and root-galling index of soilborne diseases and nematodes have been determined and calculated in the experimental variants. Grafting peppers led to significant reduction in the incidence of attacks by soilborne disease (Fusarium oxysporum var. vasinfectum (capsici)and Verticillium dahliae) and nematodes (Meloidogyne incognita).
Bogoescu, M., Doltu, M. and Sora, D. (2020). Grafting peppers on Romanian rootstocks as a method to prevent soilborne diseases and nematodes. Acta Hortic. 1270, 301-306
cultivars, disease incidence, disease severity, Fusarium oxysporum var. vasinfectum (capsici), greenhouses, scion, Verticillium dahlia