Why cotton doesn't get harmed by insects?
Insects typically avoid feeding on cotton plants due to several reasons:

Natural toxins:
Cotton plants produce toxins called gossypol, which act as a natural insect repellent. Gossypol is toxic to many insects, making the cotton plant less appealing as a food source. This natural defense mechanism helps protect the cotton plant from insect damage.

Physical barriers:
Cotton fibers are covered in a waxy substance called cuticle, which acts as a physical barrier against insects. This outer layer makes it difficult for insects to penetrate the plant and feed on its tissues. Additionally, the thick walls of cotton fibers make it challenging for insects to access the nutrients inside.

Biological controls:
Cotton plants have developed relationships with beneficial insects such as ladybugs, lacewings, and parasitic wasps, which help control pest populations. These natural predators feed on insect pests that may harm the cotton plant, reducing the need for chemical pesticides.

Cultural practices:
Farmers use various cultural practices to prevent insect damage to cotton crops. Crop rotation, intercropping, and maintaining proper field hygiene help reduce pest populations and minimize insect infestations. By implementing these practices, farmers can protect their cotton plants from insect damage without relying heavily on chemical pesticides.
Overall, the combination of natural toxins, physical barriers, biological controls, and cultural practices contributes to the resilience of cotton plants against insect pests. This natural defense system helps ensure the health and productivity of cotton crops while minimizing the environmental impact of insect control measures.