Effects of Calyx Removal Agents on Fruit Quality and Fruit Setting Rate of Zheli No.6 Pear
In order to solve the problem of fruit appearance of Zheli No.6 affected by persistent or remnant ca-lyxes and fruit apex convexity,three kinds of calyx removal agents,PBO,flusilazole and propiconazole,were selected for treatment with water as the control.The result showed that compared with control,the calyx re-moval rate of the fruits treated with the three calyx removal agents increased by 23.27％-26.01％,and the top convex rate decreased by 24.55％-26.44％.The proportion of oblate fruit,single fruit weight and total soluble solids content increased by 33.19％-37.66％,37.9-57.1 g and 0.68％-0.94％,respectively,but the degree of fruit oblique and full rust fruit rate were higher by 0.54％-0.74％and 18.36％-19.23％.The regular fruit rate and fruit setting rate decreased by 15.89％-21.07％and 5.43％-6.62％,and the differ-ences were significant or extremely significant.Spraying calyx removal agents of 4 000 mg·L-1,333.3 mg·L-1 and 444.4 mg·L-1 during the inflorescence separation period could effectively reduce the adverse effects on fruit setting rate and degree fruit oblique,while ensuring the effect of preventing calyx and convex.
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