pre-emergence herbicide 芽前除草剂
pre-emergence tillage 出苗前耕作
pre-emergence application 出土前施用
pre-emergence spray 出苗前喷药
pre-emergence spraying 出苗前喷雾
pre emergence 出苗前
pre-emergence weed control 萌前杂草防治
pre-emergence sprayer 苗前喷雾器
The induced disease appears as the difference of emergence rate by artificial inoculation in glasshouse, indicate the lose of sprouting ability and pre-emergence damping off.
在温室病原诱发接种条件下，发病表现为出苗率的差异，即丧失发芽能力或出苗前的猝倒。
Biological activities of a herbicidal compound JS913 to barnyard grass and corn in soils with different sand or water content were studied by pre-emergence watering application method.
采用浇灌法分别测定了不同土壤含沙量和含水量条件下JS913对稗草的除草活性和对玉米的安全性。
The major difference this year is the emergence of additional iPhone competitors, including Palm’s Pre.
今年市场上最大的不同在于出现了更多的iPhone竞争者，其中包括Palm Pre。
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