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作者通过改进非洲使用的袋筛发展为适合由一个人操作大量谷物的倾斜筛,达到从小麦中分离害虫成虫的目的。这种筛是用铝丝编制而成,4—5分钟内从30公斤小麦样品中筛出的害虫表明,对赤拟谷盗和谷蠹效果较好,而对米象效果较差。根据每次停筛后筛出总数的累加百分比是:一次停筛后筛出的最大数赤拟谷盗为98.8%,谷蠹为96.7%,米象为93.3%;二次
The authors achieved the goal of isolating pests from wheat by improving the use of sack screens in Africa as tilting screens suitable for handling large quantities of cereals by one person. The sieve is made of aluminum wire and the pests screened from the 30 kg of wheat sample in 4-5 minutes indicate that it is more effective against Mirabilis and Guelphorbia and less effective against Miriam. According to the cumulative percentage of the total number of sieves after each sieve was: the maximum number of sieves after a sieve was 100.8% of the Tribolium was 96.7% of the valley beetle, the beetle was 93.3%; the second