【摘要】 1998— 2 0 0 0年在浙江黄岩进行了窄幅机油乳剂 (敌死虫 )对柑桔的安全性试验。每年的 4月下旬至 10月上旬在温州蜜柑果园中分别用 0 .5 %的敌死虫定期喷洒 4～ 10次 (盛夏高温季节在16 :0 0后喷洒 ) ,结果表明 ,除在花蕾期使用会增加畸形花率 ,9月份以后喷洒使果实的日灼病斑稍趋明显之外 ,对落叶落果、果实的产量和质量等均无不良影响 ,但一年的累积用量宜控制在 4 %以下。更多还原

【Abstract】 The phytotoxicity of narrow range petroleum spray oils(PSO),D C Tron produced by Caltex,to satsuma mandarin, Citrus reticulata Blanco was investigated at Huangyan, Zhejiang province in 1998-2000.0 5% D C Tron was sprayed 4-10 times every year from late April to early October. Spray operations were conducted after 16 O’clock during midsummer. The results showed that bad effects were not found on leaf drop, fruit drop, fruit yield and quality, except that monstrous flower rate was increased when spray was done during flower bud period and sunburn disease spot appeared slightly more visible when sprayed in Sep. and Oct. But cumulation dosage per year should be controlled below 4%.更多还原