>Krupke's study is a breath of fresh air, in which he looks at actual
economic benefit (or lack thereof).  This is the sort of information that
may help to wean agriculture off the indiscriminate use of pesticides...

That is how is used to be - at least around here.  My farmer friends checked
for pests and estimated, perhaps with their agronomist, the potential
damage.  If that was greater than the cost of spraying then they sprayed.

Best wishes
 
Peter
52.144442, -1.503509

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