Microencapsulation of lambda-cyhalothrin with polyurethane-urea and application on peppermint plant leaves containing a two-spotted red spider mite (<i>tetranychus urticae</i>)

In this study, lambda-cyhalothrin (LC) used as a pesticide was microencapsulated with polyurethaneurea (PUU) at 55°C temperature for 180 min. Wall thickness and dimensions of the microcapsules, effect mixing speed on capsule size, active substance release times LC-PUU microencapsules under UV rays alcohol/water medium, microencapsulation yields red spider peppermint plant leaves (mentha piperita) were investigated. The microcapsule yield found 77.4–85.5%, also shell 512.3–724.5 nm. highest percentage microcapsules to be 35.00% 20°C 4 h light. When applied which contained two-spotted mites (tetranychus urticae), it remained 8 weeks during period no insect formation observed leaves.