摘要
文中针对传统的疫情控制效果计算公式 E F= 1 - ( T- T0)( ck - ck0) 和 E F= 1 - ( T×ck0)( ck0 × T0) 的缺欠,提出适用于多循环病害的新的疫情控制效果计算公式 E F= 1 - [( T- T0)(1 - ck) ck0][( ck - ck0)(1 - T) T0] 。此公式的优点是:在 ck0 ≠ T0 条件下也可应用,且计算结果具有唯一性。这一公式的应用条件是病害季节流行曲线适于用逻辑斯蒂模型描述。
In this paper, a new plant disease control effect calculation formula EF=1-[(T-T 0)(1-ck)ck 0][(ck-ck 0)(1-T)T 0] suitable for poly circle plant disease was put forward, in accordance with the deficiency of the traditional calculation formula EF=1-(T-T 0)(ck-ck 0) and EF=1-(T×ck 0)(ck 0×T 0) . The advantage of this formula was the only calculation result would be obtained and the formula could be used ck 0≠T 0. The applying condition of the new formula was plant disease seanson epidemic curve was suitable for the description of the logistic model.
出处
《吉林农业大学学报》
CAS
CSCD
北大核心
1999年第3期46-48,共3页
Journal of Jilin Agricultural University