Banana Kotta Vazhai and Finger Drop Disorders Management: Symptoms, Causes, Favorable Conditions, and Treatment

Banana Kotta Vazhai is a complex physiological disorder affecting Banana crops’ productivity and profitability. Banana’s Kotta Vazhai physiological disorder affects Banana crops, causing them to produce low-quality yields. The disorder was first observed in the Kotta Vazhai region of Tamil Nadu, India, in the late 1990s and has since spread to other banana-growing regions in the country and other parts of the world.

Banana Kotta Vazhai and Finger Drop Disorders Management

The disorder can affect food security, as bananas are an important staple food for many communities worldwide. Kotta Vazhai is a significant concern for banana growers and exporters as it can lead to significant financial losses due to reduced crop yields and lower fruit quality. It is, therefore, crucial to understand the disorder’s underlying mechanisms and identify effective management strategies to mitigate its impact.

This article provides an overview and discussion of Kotta Vazhai, including its symptoms, causes, and management strategies, to aid in sustainable banana production, effective control, and prevention of this physiological disorder in banana crops, ensuring profitable returns from this crop.

Banana Kotta Vazhai and Finger Drop Disorders Management

Characteristics of Banana Kotta Vazhai Disorder

  • The disorder is characterized by numerous inviable under-developed seed-like structures in the central core of the pointed, improperly filled fruits, making them inedible.
  • The most prominent symptom is the development of brown spots on the surface of the fruit, which gradually increase in size and number, resulting in a disfigured appearance.
  • The spots can appear on any part of the fruit, including the stem end, tip, and sides.
  • The affected fruit areas may also exhibit discoloration, ranging from light brown to dark brown or black.
  • Internal symptoms, such as the development of brown streaks in the fruit’s pulp, can make the fruit unsuitable for sale.
  • The development of yellow or brown spots on the leaves can eventually lead to the premature shedding of the leaves.
  • In severe cases, the affected fruit areas may crack, exposing the underlying tissue.
  • Other symptoms include a reduction in fruit size and weight, a decrease in fruit quality, and a decline in overall plant health.

Causes of Banana Kotta Vazhai Disorder Development

  • This disorder is believed to be caused by environmental stress, high temperature and humidity, and certain agricultural practices, such as excessive amounts of nitrogen fertilizers.
  • High temperature and humidity levels can stress the banana plants, and excessive exposure to sunlight can also contribute to the development of the disorder.
  • Using imbalanced or excessive fertilizers, particularly nitrogen fertilizers, can alter the soil pH and nutrient balance.
  • Improper water management, such as over- or under-irrigation, can affect the uptake of nutrients by banana plants.
  • The application of herbicides or pesticides can also cause this disorder.
  • Improper post-harvest handling also develops this disorder.

Favorable Conditions of Banana Kotta Vazhai Disorder

  • Prolonged exposure to temperatures above 30 °C and humidity above 80% can stress the banana plants.
  • Inadequate soil moisture levels can increase the likelihood of the disorder.
  • Storage at incorrect temperatures, or exposure to ethylene gas, can exacerbate the symptoms.
  • Pesticides can harm beneficial insects and microorganisms that help maintain soil health, leading to imbalanced soil nutrient levels contributing to the disorder.
  • Banana plants exposed to stress, such as pest infestations, drought, or extreme temperatures, are more likely to develop this disorder.

Management Measures of Banana Kotta Vazhai Disorder

  • Use more sustainable agricultural practices, such as applying balanced fertilizers and shade nets to reduce heat stress