Gough, R., Chooi, K.M., Sandanayaka, M., Davis, V., Hedderley, D., Taylor, T., Cohen, D., Prator, C.A., Almeida, R.P.P., Bell, V.A., & MacDiarmid, R.M. 2024 Clover in vineyards, a potential trap plant for the mealybug Pseudococcus calceolariae—a vector of GLRaV‑3 to grapevines but not clover species. Journal of Pest Science https://doi.org/10.1007/s10340-024-01807-9

Keywords:

Grapevine leafroll disease transmission

control

host plant

Notes: This study aimed to evaluate a candidate trap plant to support an ecological approach to managing GLRaV-3. The candidate trap plant tested was ‘Grasslands Huia’ white clover (GHWC), a widely grown cultivar developed in New Zealand mid-twentieth century (Caradus et al. 1997), and which is often colonized by P. calceolariae in vineyards (V. Bell pers. observations). In a 5-year vineyard trial, we assessed the interactions between P. calceolariae and the grapevine and if and how that relationship changed when the mealybug had access to permanent under-vine cover of GHWC. In a separate glasshouse experiment, we assessed if P. calceolariae could transmit GLRaV-3 to GHWC and four other clover species/cultivars.

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