维持性期望效应 sustaining expectation effect
To the seeds with rough surface, like the rice and tobacco seeds, AITC residue are high. This mean that the persistence is long.
AITC在表面粗糙的水稻种子、烟草上的残留量比较高，且持效期长，有利于种子的长期保存。
参考来源 - 辣根植物杀虫杀菌活性精油的提取及应用研究Increasing frequency of chemicals sprinckled did good to the lasting time.
增加施药频率，也可增长持效期。
参考来源 - 多效唑、矮壮素对高羊茅草坪草矮化效应及应用技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
药剂具有持效期长等优点。
它的优点是用量少、毒性低、持效期长。
Its main advantages are less dosage, low toxicity and long validity.
但由于现有剂型持效期短，限制了更大规模的应用，也给储存运输带来麻烦。
But the short residual effect of common Bti formulations limited the larger scale application in the field and brought up the inconvenience in. the transportation and storage as well.
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