Martins G L M, Vieira M R, Barbosa J C
Depto de Fitossanidade, Engenharia Rural e Solos, Fac de Engenharia, Univ Estadual Paulista (UNESP), Ilha Solteira, SP, Brasil.
Neotrop Entomol. 2013 Apr;42(2):200-4. doi: 10.1007/s13744-012-0105-1. Epub 2013 Feb 22.
The objective of the present study was to develop a sequential sampling plan for the decision-making process to control Tenuipalpus heveae Baker (Acari: Tenuipalpidae), an important pest of the rubber tree crop. The experimental area was represented by 1,000 plants of the RRIM 600 clone divided in 100 plots with 10 plants each. Leaves were collected and the number of mites determined under laboratory conditions. The sequential sampling plan was developed in accordance with the Sequential Test Likelihood Ratio. The value 0.10 was pre-established for α and β representing type I and type II errors, respectively. The level of control adopted was six mites per 12 cm(2). The operating characteristic curve and the curve of maximum expected sample were determined. Two lines were generated: the upper one, when the condition for chemical control is recommended (S1 = 23.3080 + 2.1972); and the lower, when chemical control is not recommended (S0 = -23.3080 + 2.1972). Sample size for the decision-making process to control T. heveae requires 6 to 18 plants.
本研究的目的是制定一个序贯抽样计划，用于控制橡胶树重要害虫橡胶小爪螨（蜱螨目：细须螨科）的决策过程。试验区由1000株RRIM 600品系的植株组成，分为100个小区，每个小区10株。采集叶片并在实验室条件下确定螨的数量。序贯抽样计划是根据序贯检验似然比制定的。分别为代表I型和II型错误的α和β预先设定值0.10。采用的防治水平是每12平方厘米6只螨。确定了操作特性曲线和最大预期样本曲线。生成了两条线：上面一条线，当建议进行化学防治时（S1 = 23.3080 + 2.1972）；下面一条线，当不建议进行化学防治时（S0 = -23.3080 + 2.1972）。控制橡胶小爪螨决策过程的样本量需要6至18株植株。
