Sprayer, kill crop O 04 op_notes4 Sprayer, defoliant as used on cotton or other crops. 082806 DTL Crop may regrow as there is no kill crop process. This is used for leaf drop. 10-27-06 MAS oenergyarea 1.2160101 ostir .15 G 02 gbioarea 1.0 P 31 kilflag 2 P 40