Tobacco target leaf spot loss prediction calculation method

The invention discloses a tobacco target leaf spot loss prediction calculation method, and belongs to the technical field of target leaf spot loss prediction, and the method specifically comprises the following steps: (1) after tobacco leaf investigation, classifying and recording according to disease levels; (2) establishing a tobacco target leaf spot and yield loss prediction model A to obtain a disease-grade tobacco yield prediction loss rate Y; (3) establishing a total yield loss rate model B, and calculating a loss rate J; the method is suitable for evaluating the loss of a tobacco field infected with the tobacco target leaf spot, a total loss rate calculation method is constructed, and the influence of the tobacco target leaf spot on the tobacco yield is accurately estimated. 本发明公开了一种烟草靶斑病损失预测计算方法，属于靶斑病损失预测技术领域，具体的方法如下(1)烟叶调查后按照病级分类记录；(2)建立烟草靶斑病与产量损失预测模型A，得到病级烟叶产量预测损失率Y；(3)建立总体产量损失率模型B，计算损失率J；适用于对感染烟草靶斑病的烟田进行评估损失，构建总体损失率计算方法，精准估算烟草靶斑病对烟叶产量的影响。