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作者选用的家禽饲养场为7间大小不等的没有围墙的房子。其中3间用于本试验;应用12 1压缩喷雾器喷洒药物(Larvadex)于肥料表层,药物用二种剂量:低量0.4g/m~2(9.3m~2喷0.2%水溶液1.91),高量0.89/m~2(9.3m~2喷0.2%水溶液3.81)。喷药前后及对照每周抽取肥料样品(61)回实验室测定幼虫和羽化成蝇密度。试验Ⅰ:将3排肥料堆每排分成2片(12.0×1.5m),片间间隔距离3m留作缓冲带,其中3片喷药,另3片为对照;高剂量(0.8g/m~2)处理分二步进行即
The poultry farm chosen by the author is a house with no walls of seven different sizes. Three of them were used in this experiment. Larvadex was sprayed on the surface of the fertilizer with 12 1 compressed sprayer at two doses: 0.4g / m 2 (9.3m 2 sprayed with 0.2% aqueous solution) 0.89 / m ~ 2 (9.3m ~ 2 spraying 0.2% aqueous solution 3.81). Fertilizers samples were taken weekly (before and after spraying) and controls (61) back to laboratory to measure larval and adult fly density. Test Ⅰ: The three rows of fertilizers were divided into two rows (12.0 × 1.5m) with the distance of 3m between them as buffer zone, of which 3 were sprayed and the other 3 as control. High dose (0.8g / m ~ 2) The process is divided into two steps that is