3Leslie G W. Estimating the economic injury level and the econo- mic threshold for the use of ct-cypermethfin against the sugarcane borer, Eldana saccharina Walker (Lepidoptera: Pyralidae) [J]. Inter- national Journal of Pest Management, 2009, 55(1): 37-44.
4Asghar M, Suhail A, Afzal M, et al. Determination of economics threshold levels for stem borers (Scirpophaga sp.) and leaffolder (Cnaphalocrosis medinalis) of rice (Oryza sativa) in the kallar tract of Punjab, Pakistan[J]. Int J Aric Biol, 2009(11): 717-720.
5Liang J H, Tang S Y. Optimal dosage and economic threshold of multiple pesticide applications for pest control[J]. Mathematical and Computer Modelling, 2010, 51(5-6): 487-503.
