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Research Article Open access CC BY 4.0

Design and Development of Pepper Harvester

A. Subashini, M. Bhuvaneswari, M. Chandru, M. Sudharsun, S. Vignesh, P. Yogaraj

Journal of Experimental Agriculture International · pp. 557–571 · Published 13 Apr 2026

10.9734/jeai/2026/v48i44185

Abstract

This project presents a cost-effective and efficient mechanical solution for the automated harvesting and threshing of black pepper (Piper nigrum L.). The system integrates a 12V DC motor with worm-spur gear transmission that drives counter-rotating rubber rollers for gentle on-plant threshing. The portable design incorporates a telescopic pole for extended reach, Pulse Width Modulation (PWM)-based speed control for operational flexibility, and an integrated collection system. Field testing demonstrates 86% harvesting efficiency with only 0.8% berry damage, significantly outperforming traditional manual methods. The harvester reduces labour requirements by 60% and operational costs by 66% per acre, while maintaining a field capacity of 8 kg/hour. This innovation provides small-scale farmers with an affordable, sustainable solution that enhances productivity while maintaining premium berry quality.

Agricultural mechanization portable harvester roller-based threshing system small-scale farming cost-effective technology

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