ABSTRACT
In natural state, the farmland has different pests, therefore used in a variety of pesticides to kill insect, insecticidal, however, found that there were a question of cost and efficiency, so, must find a relationship between, and according to the different levels of insect pests of rice paddies, to find a most economic and effective solution. This study is to establish a model, to solve the different levels of pesticides, using time and frequency, so that the cost and the required output to achieve. First of all, establish plant diseases and insect pests and the relationships between the growth of crops. In this problem, it will think of a similar population model, therefore, the use of learned similar population model is established in the topic of the growth of plant diseases and insect pests of crops and model, and then, according to the data of said to respectively to solve out the locust and rice have longitudinal leaf moth on combination of crop growth.
