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1984年晚季水稻及其田边几种植物上飞虱着卵株率与密度调查结果表明,飞虱着卵株率与卵密度呈曲线相关,着卵株率随卵密度的增加而增加,可用方程式P=αe~(bx)表示。当卵密度低时,着卵株率上升较慢,卵密度较高时,着卵株率上升较快。上述理论曲线是以卵的密度来计算着卵株率的。但在实际运用上要求以着卵株率来估计卵密度,这样省工、省时.又能准确估计卵的密度。文中列出了7种植物上飞虱卵密度与着卵株率的关系方程式,可供估算这几种植物上飞虱卵密度时参考。
The results of oviposition rate and density on planthoppers on rice and its rice fields in the late autumn of 1984 showed that the oviposition rate and egg density of planthopper were curve-related, and the egg plant rate increased with the increase of egg density, Equation P = αe ~ (bx) said. When the egg density is low, the rate of egg plant increased slowly, egg density is higher, the rate of egg plant increased rapidly. The above theoretical curve is based on the egg density to calculate the egg plant rate. However, in practical application, it is required to estimate the egg density by the rate of egg plant, thus saving labor and saving time and accurately estimating the egg density. The paper lists the relationship between planthopper egg density and egg plant rate on seven plant species, which can be used as a reference for estimating planthopper egg density on these plants.