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在我们现行的大豆食心虫测报调查中,有一项虫食率的调查,采用的方法是在每块田中选5点,共取大豆10～15株剥荚或混合脱粒计算虫食率。由于这种方法受取样的限制,所得的结果误差较大,而且也较为费工。我们经几年的调查研究,提出以下两种简便的调查方法,供参考。一、荚害率调查方法是选代表性地块,每块田5点或随机拔取大豆50株,剥查受害荚数,只记荚不记粒,计算出荚害率即可。然后由公式荚害率(x)与虫食率(y)之间的关系算出:y=0.931x+0.12或 x=1.074y-0.13(r=0.995>r_(0.001)=0.526)
In our current Soybean Moth Survey, a survey of insect feeding rates was conducted by selecting 5 points in each field and taking 10-15 soybean pods or mixed threshing to calculate the worm burden. Due to this method is subject to sampling restrictions, the resulting error is larger, but also more labor-intensive. After several years of investigation and study, we propose the following two simple survey methods for reference. First, the pod damage rate survey method is to choose a representative plots, each field 5:00 or 50 randomly selected soybeans, stripping victim pod number, pod not only remember grain, calculate the rate of damage to the pods. And then calculated from the relationship between the formula pest rate (x) and the insect pest prevalence (y): y = 0.931x + 0.12 or x = 1.074y- 0.13 (r = 0.995> r0.001 = 0.526)