Host status of different crops for Meloidogyne ethiopica control

Abstract

Two greenhouse experiments were carried out to characterize theresistance or susceptibility reactions of 52 species of plants toMeloidogyne ethiopica and their possible adverse effect on nematodepopulation under greenhouse conditions. Tested plants with ReproductionFactor less than one (RF<1.0) were rated as non-hosts or resistant,including: peanut (Arachis hypogaea) `Cavalo Vermelho', forage pigeonpeas (Cajanus cajan) `IAPAR 43' and `PPI 832', Crotalaria grantiana, C.apioclice, C. spectabilis, dwarf velvet bean (Mucuna deeringiana),castor bean (Ricinus communis) `IAC 80', sorghum (Sorghum bicolor)`SARA', cowpea (Vigna unguiculata) `Espace 10' and `Australian', blackoat (Avena strigosa) `IAPAR' 61', ryegrass (Lolium multiflorum)`Italian', forage radish (Raphanus sativus var. oleiferus) IPR116' andrye (Secale cereale) `IPR 69'. The first 11 are summer plants and thelast four winter plants. The other 37 species/cultivars tested were goodhosts or susceptible. Some crop succession systems alternating summerand winter non-host plants are suggested for field experiments tovalidate these greenhouse results.