Hand-Pollination of Cowpeas (image) American Society of Agronomy Share Print E-Mail Caption Tweezers are an indispensable tool when it comes to delicate hand pollination of cowpea plants. Credit Marti Pottorff, UC Riverside. Usage Restrictions Please use with story only Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.