What is the primary advantage of using physical barriers like insect netting over brassicas?

Answer

They prevent both diurnal butterflies and nocturnal moths from landing and laying eggs.

Physical exclusion methods like netting or row covers are recommended to stop any flying pest, effectively preventing both the daytime activity of butterflies and the nighttime activity of moths.

What is the primary advantage of using physical barriers like insect netting over brassicas?
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