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
pre-emergence weed killer 萌前除莠剂
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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