TY  - BOOK
AU  - JASWANT Singh
TI  - Development of a laboratory technique for screening of cotton varieties for resistance to the cotton jassid (Amrasca Biguttula Biguttula (Ishida)
U1  - T 633.519.752 J35D 
PY  - 1974///
CY  - Ludhiana
PB  - PAU
KW  - COTTON -- DISEASES & PESTS
KW  - COTTON
KW  - ENTOMOLOGY
KW  - JASSID
KW  - LEAF - HOPPERS
KW  - RESISTANCE
KW  - TECHNIQUE
N2  - The nymphal duration was maximum on 231-R variety of desi cotton at all the three stages of growth The survival of nymphs was almost similar on the four varieties in the cotyledonary and one-week 01(: stages but it was the least on the two-week old plants
ER  -