Fecha de publicación: -- Fuente: WIPO "tomato" Embodiments of the present disclosure provide a crystal form of acequinocyl represented by formula (I), and its preparation method and application. Formula (I). An X-ray powder diffraction pattern (Cu-Kα radiation) of the crystal form has a characteristic diffraction peak at 3.3°2θ±0.2°2θ and a characteristic diffraction peak (s) at at least one of 6.7°2θ±0.2°2θ, 10.1°2θ±0.2°2θ, 10.4°2θ±0.2°2θ, 11.0°2θ±0.2°2θ, 13.5°2θ±0.2°2θ, 14.6°2θ±0.2°2θ, 17.1°2θ±0.2°2θ, 22.1°2θ±0.2°2θ, or 24.5°2θ±0.2°2θ.