Organic farmers control pests in multiple simultaneous ways. Organic farmers select their crop varietals more carefully than traditional farmers, looking for crops with high resistances to disease. Organic farmers also plant what are called companion crops, usually flowers, to attract certain insects that feed on the pests attracted to the primary crop (for example, the flower sweet alyssum attracts lacewings and syrphid flies, both of which eat the aphid insects that organice lettuce farmers find pesky). Organic farmers also often rotate their crops in an attempt to disrupt the reproduction cycles of pests (which is also a boon to the soil).
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