Estimation of strawberry fruit weight based on fruit diameter

Strawberry fruits are generally sorted by weight.
Apart from saving labor, fruit sorting based on diameter by human or robot fingers allows packing in parallel with sorting.
Here, we established a practical method for estimating strawberry fruit weight from fruit diameter.
A close relationship (r²=0.93-0.97) was observed between fruit weight and diameter of strawberry cultivar ‘Koiminori’ grown in 3 greenhouses.
The R² of the regression equation for estimating fruit weight from fruit diameter was higher when both fruit diameters were used compared to that obtained by using the long or short diameters alone.
The performance of the regression equation was also affected by the growing environment and harvest time, which may be due to fruit shape changes in humidified conditions and in winter harvests on account of lower fruit oblateness.
These factors must be carefully considered for accurate estimation of fruit weight from fruit diameter.

IV Asian Horticultural Congress – AHC2023

M. Hikawa-Endo, H. Shigemune, C. Hojo, K. Yamaguchi, K. Murakami, T. Yano, R. Yamanaka

fruit long diameter, fruit oblateness, fruit short diameter, growing environment, regression equation, seasonal variation

https://doi.org/10.17660/ActaHortic.2024.1404.171