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１９９３～１９９４年进行了２，４—Ｄ对７～８年金蜜李的保果效应试验。结果表明，叶面喷施２，４—Ｄ，能明显提高金蜜李的座果率和产量。在盛花期喷布２，４─Ｄ，座果率比对照提高８４．４％～１７３．３％，产量比对照提高１１８．５％。在盛花期和果实膨大期喷２，４—Ｄ，座果率比对照增加１６５．８％～３８４．２％，产量增加１６７．１％。２，４—Ｄ的最适保果浓度为２０ｐｐｍ，在盛花期和果实膨大期二次喷施２０ｐｐｍ２，４—Ｄ＋０．２％ＫＨ２ＰＯ４混合液的保果和增产效应最佳。
From 1993 to 1994, the effects of 2,4-D on the fruit-preserving effect of the golden honeysuckle cultivars from 7 to 8 years were studied. The results showed that foliar spraying 2,4-D, can significantly improve the honeysuckle fruit yield and yield. Spraying at full flowering stage 2,4 ─ D, fruit rate increased 84.4% ~ 173.3% compared with the control, the yield increased 118.5% over the control. In full-flowering and fruit enlargement spray 2,4-D, fruit set rate increased 165.8% ~ 384.2% compared with the control, the output increased 167.1%. The optimal concentration of 2,4-D was 20ppm, and the optimal combination of 20ppm2,4-D and 0.2% KH2PO4 was the best for both fruit growth and fruit enlargement.