Traditional pest and disease detection is mainly what and field sampling

(1) 5-point sampling method. Applicable to dense or rows of plants, the distribution of pests for the random distribution of populations, according to a certain area, a certain length or a certain number of plants to select five sample points. (2) Diagonal sampling method. Applicable to dense or rows of plants, pests and diseases distribution is random distribution of populations, there are single diagonal and double diagonal two. (3) Checkerboard sampling method. Applicable to dense or rows of plants, pest and disease distribution is random or core distribution of populations. (4) Parallel jump sampling method. Applicable to crops cultivated in rows, pest distribution is a core distribution of populations, such as rice borer larvae survey. (5) Zigzag sampling. Suitable for embedded grain distribution of pests, such as cotton leaf mite survey.