Death comes to us all. Life's but a walking shadow | You might want to consider a couple of IPM strategies. One, leave some small portions unsprayed. Those portions may look really ugly and you might think that they serve as a infection source but the beneficials might just spread out fast enough to keep ahead of the aphids if the spray residual is short enough.
Two, if you can identify an effective beneficial provide an over winter niche. For example, we don't spray soybean aphids here, The alternative host for lady beetles is the box elder tree, You can actually watch the lady beetles move from the box elder trees in mid June to the soybean fields. The aphid populations start to build, then you see few adult lady beetles followed by lady beetle larva a very few days later and then the aphids just disappear replaced by adult beetles and larva. |
The bigger question.
