
TY  - JOUR
A1  - Asghar, M 
A1  - Ingram, BF 
T1  - Effects of defoliation on dryland wheat production in central Queensland
JF  - Australian Journal of Experimental Agriculture
JO  - Aust. J. Exp. Agric.
Y1  - 1993
VL  - 33
IS  - 3
SP  - 349
EP  - 351
KW  - 
UR  - https://doi.org/10.1071/EA9930349 
N2  - The effect of insect defoliation on grain yield, nitrogen (N) content, and gross value of dryland wheat was simulated by removing blades from the flag leaf, top 2 leaves (flag leaf plus the one below it), and all leaves, 100 days after planting the crop. When blades were removed from the top 2 leaves and all leaves, respectively, significant (P<0.05) reductions of 13.5 and 17.3% in grain yield, 9.2 and 11.9% in head weight, and 7.6 and 13.2% in 1000-grain weight were recorded. Defoliation did not significantly decrease grain number/m2. When blades were removed from the flag leaf, top 2 leaves, and all leaves, respectively, significant (P<0.05) reductions of 9.5, 17.3, and 14.0% in grain N concentration, and 14.2, 28.4, and 28.8% in grain N yield (g/m2), occurred. Gross values of the yields from different treatments were ranked (differences at P = 0.05) control > flag leaf blade removed > top 2 leaves removed = all leaves removed. 
ER  -

