Fungal Diseases:
- Fusarium Wilt: Causes wilt and yellowing of leaves, leading to plant death.
- Verticillium Wilt: Similar symptoms to Fusarium wilt, but occurs later in the growing season.
- Root Rot: Caused by various soil-borne fungi, leading to root decay and wilting.
- Botrytis Gray Mold: Affects leaves, bolls, and flowers, causing them to rot.
- Alternaria Leaf Spot: Causes brown spots on leaves, reducing photosynthesis.
- Anthracnose: Fungal disease that can affect all plant parts, causing leaf spots, boll rot, and stem cankers.
Bacterial Diseases:
- Bacterial Blight: Causes wilting, yellowing, and defoliation, leading to reduced yields.
- Angle Leaf Spot: Causes angular brown spots on leaves, defoliation, and boll rot.
- Xanthomonas Wilt: Bacteria that blocks water transport, leading to wilting and plant death.
Viral Diseases:
- Cotton Leaf Curl Virus: Virus transmitted by whiteflies that causes stunted growth, leaf deformation, and reduced yields.
- Okra Mosaic Virus: Causes yellowing, mosaic patterns, and reduced leaf size.
- Tobacco Streak Virus: Affects leaves, causing them to turn mottled and curl.
Nematode Diseases:
- Root-Knot Nematodes: Microscopic worms that feed on cotton roots, causing stunted growth, reduced yields, and susceptibility to other diseases.
- Dagger Nematodes: Attack roots, causing brown lesions and decreased root function.
- Sting Nematodes: Puncture roots, leading to reduced yields and increased disease susceptibility.
Other Diseases:
- Rust: Fungal disease that causes brown or orange pustules on leaves.
- Pink Bollworm: Moth larvae that feed on developing cotton bolls, reducing fiber quality and yield.
- Spider Mites: Tiny pests that feed on leaves, causing yellowing, spotting, and premature defoliation.
- Thrips: Small insects that pierce and suck plant juices, causing silvery spots on leaves and reduced yields.