论文部分内容阅读
以往的报道认为,李小食心虫以老熟幼虫在李树树干周围1.5尺范围、1—5厘米深的表土内或草根附近或石块下结茧越冬。杏为李小食心虫的重要寄主,树龄较大的杏,树冠直径可达8米以上。越冬茧在杏树下的分布情况如何?弄清此问题,对其越冬期的防治具有重要意义。为此,我们于1984年4月初在包头郊区沙木佳村果园进行了初步调查。现将结果报道如下。
According to previous reports, the larvae of Borrelia lanceolaris mature larvae in the 1.5-foot range around the trunk of the tree, overwintering in the topsoil 1-5 cm deep or near the roots or under stones. Apricot is an important host of small heart worms Li, older apricot, canopy diameter up to 8 meters. The distribution of wintering cocoon under the apricot tree? To understand this problem, its winter prevention and control is of great significance. To this end, we conducted a preliminary investigation in early April 1984 in the orchard of Shamujia Village, Baotou suburb. The results are reported below.