Sampling techniques for estimating the apterous population of Cerataphis variabilis H.R.L. (Homoptera: pemphigidae) on raphia palms
ABSTRACT: Three sampling methods for assessing Cerataphis variabilis population on raphia palms were used and described – ‘spear tip’, basal leaflet on frond-one and infestation scale. The variances, .obtained from each data were’ not significantly different from one another at the 5% level. The merits and demerits of the different techniques are discussed.