The status of the sugarcane scale Melanaspis glomerata (Green) (Homoptera: Diaspididae) in an international collection of Saccharum spontaneum L., maintained as a part of world sugarcane germplasm at the ICAR-Sugarcane Breeding Institute Research Centre, Kannur, Kerala state, India, was examined in 2016 and 2017. The scale appeared in May coinciding with cane formation and the infestation started increasing during the post-monsoon period (September–December) which continued until harvest (January). Scale infestation varied widely among the accessions of S. spontaneum in the two experimental years. Infestation rates (cane basis) were significantly higher in 2017 than in 2016. Infestation rate and intensity (internode basis) were positively correlated in 2017. When the 79 accessions examined were grouped into three categories on the basis of higher infestation rate in the two study years, 21 (26.6%) were placed in least susceptible, 38 (48.1%) in moderately susceptible and 20 (25.3%) in highly susceptible categories. The highest infestation rate (100.00%) was recorded in the accession US 56–10-14 and lowest (2.94%) in SES 106B; two accessions, namely SH 61–4-1 and SH 61–4-3 were totally free from infestation. Non-parametric analysis of infestation parameters indicated higher intensity in foreign than Indian accessions. Plant height was positively and number of internodes negatively correlated with infestation rate in the low infestation year (2016). Also, infestation rate (2016) was significantly higher in accessions with inconspicuous wax band than those with prominent wax band; intensity (2017) was significantly highest in accessions with conoid internode shape in comparison with cylindrical and obovate shapes. However, canopy and leaf characteristics did not influence attack rates.

甘蔗鳞片Melanaspis glomerata（绿色）（直翅目：蝇科）在国际糖蔗糖种库中的地位，作为国际甘蔗种质的一部分，保存在印度喀拉拉邦坎纳尔市ICAR-甘蔗育种研究所研究中心。于2016年和2017年进行了检查。在5月出现的规模与甘蔗的形成相吻合，并且在季风后时期（9月至12月）开始持续蔓延直至收获（1月）。自发链球菌的规模侵染差异很大在两个实验年中。2017年的病虫害发生率（以甘蔗为基准）明显高于2016年。2017年的病虫害发生率与强度（节间为基础）呈正相关。在两项研究中，根据较高的虫害发生率将79个登录种分为三类年，最不易感的人群为21（26.6％），中度易感人群为38（48.1％），高度易感人群为20（25.3％）。在US 56-10-14中记录到最高的出没率（100.00％），在SES 106B中记录了最低的出没率（2.94％）。SH 61–4-1和SH 61–4-3这两个种完全没有感染。非侵染参数的非参数分析表明，外源强度高于印度登录。在低侵染年（2016），株高与侵染率呈负相关。同样，蜡带不明显的种质的侵染率（2016）显着高于蜡带明显的种质。与圆柱形和倒卵形相比，圆锥形节间形状的种质的强度（2017）最高。但是，冠层和叶片的特性不会影响攻击率。