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Nutrient deficiency
Disease Management
Pest Management
Nutrient deficiency
Nitrogen deficiency
Symptoms
- Stunted plants.
- Leaf discolouration from tip of the leaves (yellowing).
Solution Products
Phosphorus Deficiency
Symptoms
- Older leaves turn brownish red & purple colors develop in leaves.
- Other symptoms include, purplish leaves, poor boll retention and delayed flowering
Solution Products
Potassium Deficiency
Symptoms
- Dark green plants with yellowish.
- Brown leaf margins and brown necrotic spots on the tips of older leaves.
Solution Products
Disease Management
Fusarium wilt
Symptoms
- Yellowing and browning of cotyledons followed by browning on the petiole.
- Loss of turgidity, yellowing, drooping and wilting of leaves.
Verticillium wilt
Symptoms
- Bronzing of veins followed by interveinal chlorosis, yellowing and scorching of leaves
- Leaves exhibit drying of leaf margins and areas between veins shows “Tiger stripe symptom”
Root rot
Symptoms
- Germinating seedling shows black lesions on hypocotyls, girdling of stem and death of seedlings.
- The entire root system gets rotted, plants dried and the affected plants can be easily pulled out.
Boll Rot
Symptoms
- Disease appears as small brown or black dots which later enlarge to cover the entire bolls.
- Fruiting bodies of fungi are observed on the bolls.
Alterneria leaf blight
Symptoms
- Small, pale to brown, irregular or round spots, appear on the leaves.
- Each spot has a central lesion surrounded by concentric rings.
Pest Management
Fruit borer
Symptoms
- Regular circular boreholes on bolls.
- Presence of granular faecal pellets outside bore hole.
- Larva seen hanging in bore hole with head and part of abdomen thrust inside.
Solution Products
Pink bollworm
Symptoms
- Rosetted flowers
- They cut window holes (interlocular burrowing) in the two adjoining seeds thereby forming "double seeds"
- The attacked buds and immature bolls drop off.
Solution Products
Spotted bollworms
Symptoms
- Drying and drooping of terminal shoots during pre-flowering stage
- Shedding of squares and young bolls
Solution Products
Leafhopper
Symptoms
- Downward curling and reddening of leaves.
- Under severe infestation turn brick red colour.
Cotton aphid
Symptoms
- Leaves are shiny with honeydew or darkened by sooty mould growing on the honeydew.
- Crumpling and downward curling observed under severe attack.
Cotton Mealybug
Symptoms
- Vegetative phase exhibit symptoms of distorted, bushy shoots, crinkled and/or twisted bunchy leaves and stunted plants that dry completely in severe cases.
- Honeydew secreted by the mealybug encourages development of black sooty mould which adversely affects photosynthetic activity.
