片烟快速杀虫技术研究

Study on rapid insecticidal technology of tobacco

通过片烟单一真空、真空+充氮、真空+高温、低温快速杀虫方法进行杀虫效果研究,通过对比处理烟叶品质变化情况,确定片烟快速杀虫技术措施。结果表明,单一真空杀虫、真空+充氮杀虫无法达到快速杀虫目的,采用真空度≤500 Pa、温度70℃、处理时长15 min和温度-20℃、处理时长2 h可达到对烟虫100%杀灭效果。采用真空回潮杀虫技术,主要技术参数控制在真空度≤500 Pa、温度70℃、处理时长维持在15 min,即可达到杀虫效果,真空回潮杀虫后,立即采用真空降温除湿30~60 min,快速恢复烟叶水分、温度,可避免高温高湿对烟叶造成不良影响;采用低温快速杀虫技术,温度-20℃、处理时长2 h,可达到杀虫效果,同时在降温处理过程中,采用间歇式抽负压方式,可快速降低片烟温度。

The insecticidal effect of single vacuum,vacuum+nitrogen filling,vacuum+high temperature and low temperature rapid insecticidal methods of tobacco was studied.The technical measures of rapid insecticidal technology of tobacco were determined by comparing the changes of tobacco quality.The results showed that single vacuum insecticidal and vacuum+nitrogen filled insecticidal could not achieve the purpose of rapid insecticidal.Using vacuum degree≤500 Pa,temperature 70℃,treatment duration 15 min or temperature-20℃and treatment duration 2 h could achieve 100%killing effect on tobacco insects.Using vacuum moisture regain in⁃secticidal technology,the insecticidal effect could be achieved when the main technical parameters were controlled at the vacuum de⁃gree≤500 Pa,the temperature was 70℃and the treatment time of tobacco leaf temperature was maintained at 15 min.After vacuum moisture regain insecticidal,vacuum cooling and dehumidification were used immediately for 30~60 min to quickly restore the water content and temperature of tobacco leaves,so as to avoid the adverse impact of high temperature and humidity on tobacco leaves;the insecticidal effect could be achieved by using low temperature and rapid insecticidal treatment.The temperature was-20℃,and the treatment time was 2 h.At the same time,in the process of cooling treatment,the intermittent negative pressure pumping method could quickly reduce the temperature of tobacco.