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Susceptibility to virus infection of candidate plants used to enhance predatory dicyphine (Heteroptera: Miridae)

AutorMorales, I.; Sánchez, Juan Antonio; Alomar, Oscar; Lacasa, A.; Fereres, Alberto
Palabras claveHeteroptera
Marrubium vulgare
Dittrichia viscosa
Ononis natrix
Carlina corymbosa
Verbascum thapsus
Insectary plants
Fecha de publicación2006
EditorInternational Organisation for Biological and Integrated Control of Noxious Animals and Plants
CitaciónIOBC/WPRS Bulletin 29:255-260(2006)
ResumenSelecting candidate plants in order to enhance predators for conservation biological control not only has to consider their contribution to enhancement of predators, but also avoid the risk of acting as reservoirs of potential pests or diseases. Mirid bugs are effective biological control agents of tomato pests and the introduction of insectary plants has been shown to be an effective means for the conservation of these important natural enemies. We studied the degree of susceptibility and the role of selected insectary plants as reservoirs of the most important viruses found in tomato crops in Spain. A virus survey conducted in the regions of Murcia and Barcelona, and a series of transmission experiments conducted under controlled conditions indicated that the species Dittrichia viscosa and Marrubium vulgare are susceptible and may play a significant role in Potato virus Y and Cucumber Mosaic Virus epidemics, whereas virus were never detected in Carlina corymbosa and Ononis natrix collected in the field and were immune to the transmission of both viruses by aphids. Our work suggests that there is a potential risk for virus epidemics to occur if M. vulgare and D. viscosa are introduced as insectary plants to attract and enhance biological control by predatory mirids. Further research is needed to confirm the role that M. vulgare and D. viscosa and Verbascum thapsus may play in the epidemics of PVY and CMV in tomato crops. C. corymbosa and O. natrix appear to be the species that show the lowest risk as reservoirs of viruses that commonly infect tomato crops.
Descripción6 pages, and figures, and tables
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