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BACKGROUND  The effect of spatial separation of the semiochemical Lurem‐ TR , which has been found to inhibit conidia of entomopathogenic fungi when put together, on the persistence of conidia of  Metarhizium brunneum  and  M. anisopliae  was evaluated in the greenhouse and field in order to develop an autodissemination strategy for the management of  Megalurothrips sjostedti  on cowpea crop. Influence of spatial separation of the semiochemical on thrips attraction and conidial acquisition by thrips from the autoinoculation device was also investigated in the field.    RESULTS  Persistence of conidia of  M. brunneum  and  M. anisopliae  increased with distance of separation of Lurem‐ TR . Direct exposure of fungus without separation from Lurem‐ TR  recorded the lowest conidial germination as compared with the other treatments. Attraction of thrips to the device also varied significantly according to distance between device and semiochemical, with a higher number of thrips attracted when Lurem‐ TR  was placed in a container below the device and at 10 cm distance. There was no significant difference in conidial acquisition between spatial separation treatments of conidia and Lurem‐ TR . Attraction of other insect pests to the device did not significantly vary between treatments. Positive correlations were found between conidial acquisition and thrips attraction.    CONCLUSION  This study suggests that spatial separation of fungal conidia from Lurem‐ TR  in an autoinoculation device could provide a low‐cost strategy for effective management of thrips in grain legume cropping systems. © 2015 The Authors.  Pest Management Science  published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

pest management science

Spatial separation of semiochemical Lurem‐ TR  and entomopathogenic fungi to enhance their compatibility and infectivity in an autoinoculation system for thrips management