Abstract
Abstract Stomatal is the most crucial part of plant organs that function as the gas exchange between CO 2 and O 2 in the environment through diffusion. Optimal stomatal performance can improve the quality of plant growth. This research aimed to determine the relationship between stomatal parameters and the production of red chili ( Capsicum annuum L) under shade treatment conditions. This research was conducted in the field with three kinds of treatments, namely (1) control (without shade), (2) 50% shade, and (3) 80% shade. The parameters observed in this study were the number of stomatal, pore stomatal, stomatal area. The data were then analyzed using the correlation coefficient (r) calculation approach. The results showed that the closest relationship was found in the stomatal area variable with a pore area of 0.98. The stomatal characteristic that has the closest relationship with the production of red chili ( Capsicum annuum L) is the pore area with a value of r = 0.73. These results indicate that pore area can be used as an indicator of crop production level.