Allsopp, P.G., McGill, N.G., & Stringer, J.K. 2000 Host-plant resistance in sugarcane to pink ground pearls, Eumargarodes laingi Jakubski (Hemiptera: Margarodidae): Confirmation and further screening of clones.. Australian Journal of Entomology 39(4): 316-321.

Notes: The response of 11 commercial cultivars and nine experimental clones of sugarcane to the margarodid Eumargarodes laingi Jakubski were evaluated over the plant (first harvest) and two successive annual ratoon harvests in a field trial in southern Queensland. Clones varied in the number of cysts developing on the roots with the lowest numbers on Q147, Q135 and Q182 and the highest on Q124, Q141, Q184 and 85S1247. The effect was similar over the three crops and indicates the presence of antibiosis and/or antixenosis. Clones also varied in cane and sugar yields and sugar content, with Q136, Q135, Q155, Q147 and Q124 giving the highest cane and sugar yields and 87S7364, 87S7367, 85S1247, Q141 and Q184 giving the lowest. Deviations from a general relationship between number of cysts and yield suggest that clones such as Q136, Q124 and Q155 have tolerance to E. laingi. Good concurrence in the ranking of clones between harvests and between this trial and previous work indicates that the resistance is stable and could be selected for on the basis of data from 1 or 2 years.