How to Succeed by Doing Nothing
Cotton Compensation after Simulated Early Season Pest Damage
Lewis J. Wilson*,a,
Victor O. Sadrasc,
Simone C. Heimoanaa and
Dallas Gibbb
a CSIRO Division of Plant Industry and Australian Cotton Cooperative Research Centre, Narrabri, NSW, Australia, 2390
b NSW Agriculture and Australian Cotton Cooperative Research Centre Cotton Research Unit, Locked Bag 59, Narrabri, NSW, Australia, 2390
c CSIRO Land and Water, Private Bag No. 2, Glen Osmond, South Australia, 5064

View larger version (40K):
[in a new window]
|
Fig. 1. Effect of defoliation, tip damage, and early fruit loss on maturity of cotton in Exp. 2 and 3. Values are means + SE. Asterisks indicate treatments significantly different from the control at P = 0.05. For treatments, F indicates removal of fruit from first four fruiting branches; 50L or 100L are percentages of the leaf tissue removed; number of damage events is indicated by x 2 (twice) or x 4 (four times); and tip damage is indicated by T.
|
|

View larger version (28K):
[in a new window]
|
Fig. 2. Relative leaf area and shoot dry weight of cotton in Exp. 4. Bars indicate Fisher's Protected LSD values at P = 0.05; arrows indicate the timing of damage treatments; and numbers on each graph indicate the actual leaf area (cm2) or shoot dry weight (g) of undamaged plants at the time samples were collected. Legend refers to amount of leaf area removed (i.e., 100%) by the number of damage events (i.e., x 2 or x 3).
|
|

View larger version (24K):
[in a new window]
|
Fig. 3. Effect of defoliation on crop maturity in Exp. 4. Asterisks indicate treatments significantly different from the control at P = 0.05. Values are means ± SE. Treatment labels refer to the amount of leaf area removed (i.e., 100%) by the number of damage events (i.e., x 2 or x 3).
|
|
Copyright © 2003 by the Crop Science Society of America.