Moths,aphids and mealy bugs cause damage to crops by their

Moths, aphids, and mealy bugs cause damage to crops by their piercing and sucking activities. These pests use their mouthparts to pierce the plant tissues and suck the sap or plant juices out of the plant. This can cause damage to the plant's structure, affect its growth and development, and even lead to the plant's death. Additionally, these pests can also transmit diseases to the plant while feeding. Therefore, it is important to control these pests to prevent damage to crops and ensure optimal plant growth and development.