What type of spray application involves treating a specific strip over each crop row?

The correct answer is band spray because this application method is specifically designed to treat a narrow strip or band over the crop row, rather than covering the entire field. Band spraying targets the area where the crops are planted, allowing for more efficient use of pesticides while minimizing the treatment to non-crop areas. This technique not only helps to reduce the overall amount of pesticide used but also lessens the environmental impact by limiting exposure to surrounding vegetation and wildlife.

In contrast, directed sprays are typically focused applications aimed at particular plants or insects, spot treatments involve treating very localized areas, and broadcast spraying covers the entire area uniformly, not targeting specific rows. Band spraying is particularly beneficial in crop production as it enhances effectiveness while promoting sustainability.