Trap crops as a component for the integrated management of Globodera spp. (potato cyst nematodes) in Bolivia

Globodera spp. is one of the most important nematodes of potato in Bolivia. The development of a management strategy with non-host crops has been considered, but this option is limited by several factors. The objective of this study was to identify lines of common crops in Bolivia with activity on egg hatch of Globodera spp. that could reduce the effective length of the crop rotation cycle in potato fields. We evaluated effects on egg hatch of Globodera spp. of 127 lines of Lupinus mutabilis, 303 lines of oca (Oxalis tuberosa), 27 lines of isano (Tropaeolum tuberosum), 85 ollucus (Ullucus tuberosus), 5 quinuas ( Chenopodium quinua), and 13 barleys (Hordeum vulgare), in relation to three controls (potato var. Waych'a, barley IBTA-80 and fallow) under greenhouse conditions. A number of lines exhibited egg hatching activity similar to potato (trap lines), or a permanent hatching inhibitory effect (antagonistic lines). The incorporation of these selected lines of Andean crops in rotation schemes by farmers may play an important role in the integrated management of potato cyst nematodes since these crops are quite common in traditional Andean cropping systems in Bolivia.