马铃薯小地老虎的发生、危害和残害

• 作 者: B.B.Das G.Ram 伊伯仁
• 出 处: 国外农学-杂粮作物
• 发表日期: 1990年01期
• 关键词: 小地老虎 马铃薯 杀虫剂 受害率 比哈尔邦 块茎 田间试验 寄主 月份 诱集

在印度比哈尔邦小地老虎的发生逐年变化,马铃薯受害率从30%到35%。对这种害虫的残害机理人们的看法不同。1983～1984和1984～1985年期间,在巴特那(Patna)进行了研究小地老虎危害,发生和残害规律的田间试验。为了记载危害的程度,2月份从农场施杀虫剂地块和未施杀虫剂的15公顷面积上收获了几乎所有小区的块茎,其中包含了全部主栽品种。

In Bihar, India, the occurrence of small tigers has changed from 30% to 35%. People have different opinions on the mechanism of this pest. A field trial was conducted in Patna between 1983 and 1984 and from 1984 to 1985 to study the hazards, occurrences and remnants of small tigers. To document the extent of the hazard, almost all plots of tubers were harvested from farms with pesticide plots and no pesticides in February, containing all of the major cultivars.