TY - BOOK AU - KULAR, Jagdev Singh TI - Standardization of screening technique and evaluation of cotton genotypes against whitefly, Bemisia tabaci Genn U1 - T 633.519.752 K98S PY - 1993/// CY - Ludhiana PB - PAU KW - COTTON -- DISEASES AND PESTS KW - BEMISIA TABACI KW - COTTON KW - ENTOMOLOGY KW - SCREENING TECHNIQUES KW - WHITEFLIES N2 - The results of no choice test showed that the screening of cotton germplasm be done at 2-leaf stage for first injury grade and 4-leaf stage for second/third injury grades with 200 adults/plant. Genotypes no 3,6,18 and 25 were graded as resistant, moderate ER -