Black Thrips Attack Chilli Crops in Karnataka

Why in the News?

The chilli crop in Karnataka's Ballari region is once again under threat from black thrips, a pest responsible for devastating crop losses during the 2021-22 cropping season.

What Are Black Thrips?

• Scientific Name: Thrips parvispinus (Karny)
• Feeding Habits: Thrips are polyphagous pests, meaning they infest a variety of crops, including agricultural, horticultural, and ornamental plants.
• History in India: First identified feeding on papaya in Karnataka in 2015, the pest has now spread to multiple crops across several states.

Habitat and Distribution

• Habitat: Found in agricultural fields, gardens, and greenhouses.
• Distribution: Andhra Pradesh, Telangana, Karnataka, Tamil Nadu, Kerala, Maharashtra, Gujarat, Odisha, Chhattisgarh, and Assam.

Characteristics and Behavior

• Size: Black thrips measure just 1–2 millimeters in length.
• Feeding Mechanism: These insects use piercing-sucking mouthparts to extract sap from flowers and tender plant parts.
• Damage caused to plants by black thrips:
  • Shedding of flowers.
  • Stunting and malformation of fruits.
  • Overall reduction in crop yield.

Impact of Black Thrips on Agriculture

1. Threat to Crop Yields: Severe losses in crops like chilli, papaya, eggplant, and pepper.
2. Economic Hardship: Farmers face reduced income due to lower crop quality and yields.
3. Consumer Impact: Increased prices due to reduced supply.
4. Control Challenges: Limited availability of effective biological or chemical control solutions.

Ongoing Measures by Authorities

Research and Development

• National Bureau of Agricultural Insect Resources (NBAIR): Actively exploring biological control agents and chemical solutions to combat black thrips.

Field Surveys

• Directorate of Plant Protection, Quarantine & Storage (DPPQS): Conducting extensive field surveys to assess pest populations and the extent of crop damage.

Conclusion

The re-emergence of black thrips in Karnataka highlights the critical need for effective pest control strategies. Farmers, researchers, and policymakers must collaborate to mitigate the pest's impact and protect livelihoods.