长豇豆锈病显症动态

ON APPARITION DYNAMIC OF ASPARAGUS LONG BEAN RUST

本研究比较了描述长豇豆锈病显症动态的三种数学模型。结果表明,长虹豆锈病显症动态的描述,系以Richards模型最好,Logistic模型和Gompertz模型之间无显著差异。单就同一模型而言,有效积温累积显症率又较逐日累积显症率为好。在此基础上,文中提出了配以Richards方程求拐点的方法来估算病害的潜伏期,本病的潜伏期为7～9天。

With the data obtained from inoculation experiments,the apparition dynamic of asparagus long bean(Vigna sesqurpedalis(L.)Fruvvirth)rust(Uromyces phoseoli Wint var.Vignae(Barcl.)Arth)was studied in detail,showing that Richards function was the best for the description of the apparition dynamic and there was no singificant difference between Logistic and Gompertz functions.As a unit,the effective accumulated temperature was found to be better than day for the study of the probability of apparition of this fungus no matter which function was used.The method for determining the latent period of the disease by the use of inflexion of the function was described,the latent period of the disease studied being found to be 7-9 days.