TY - JOUR AU - Wilson, Lloyd T. AU - Leigh, Thomas F. AU - Maggi, Victor TI - Presence-absence sampling of spider mite densities on cotton JF - California Agriculture JO - Calif Agr Y1 - 1981/07/01 VL - 35 IS - 7 SP - 10 EP - 10 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v035n07p10 AB - A simple, practical plan for reliably estimating mite densities overcomes problems of quantitative sampling.