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在矢尖蚧雌成蚧的不同发育阶段、柑桔不同物候期以及不同气候条件下,探讨实施该虫全年一次性药剂防治时,矿物油制剂与有机磷农药混用的适宜配方和喷布时期。结果表明,其最佳配方(体积比)是:40％氧化乐果乳油或40％水胺硫磷:95％机油乳剂:清水=1:60 :3000。混配药液中基础物质机油乳剂的浓度必须保持在2％以上,而有机磷农药则可稀释3000倍。初步探明的最佳喷药时期是:矢尖蚧越冬代雌成蚧次年产卵末期,亦即当年第1代幼蚧虫口发生后峰期至终见期或第2代幼蚧发生的初期,也是柑桔第2次生理落果后期至果实膨大初期,一般正处于梅雨季节接近结束、高温干旱季节来临前,此时喷药能有效阻止幼蚧上果危害。较佳喷药时期为该虫越冬期,即采果后的11～12月,一般正值花芽分化前期,此时温度低湿度高,使用安全。
In different developmental stages of P. sinensis, different phenophase of citrus and different climatic conditions, the appropriate formula and spraying period for the mixture of mineral oil and organophosphorus pesticide were discussed in the course of implementing the annual pesticide control . The results showed that the optimum formulation (volume ratio) was: 40% omethoate or 40% aqueous ammonia: 95% oil emulsion: water = 1: 60: 3000. The concentration of the base oil emulsion in the compounding solution must be kept above 2% while the organophosphorus pesticides can be diluted 3000 times. The best preliminarily proven spraying period is: Late generation of Agkistrodon acutus overwintering on behalf of the female end of the year of laying the end of the year, that is, the first generation of the scale insects occurred after the peak period to the final period or the second generation of juveniles occurred In the early stage, it is also the beginning of the second stage of physiological fruit drop to the early stage of fruit enlargement, which is generally near the end of the rainy season. Before the onset of the hot and dry season, the spraying can effectively prevent the damage of the juvenile oncomelania. The preferred spraying period for the pest overwintering period, that is, 11-12 months after picking fruit, the general positive value of flower bud differentiation at this time the temperature low humidity, safe to use.