简阳根结线虫Meloidogyne jianyangensis n. sp. 采自四川简阳县柑桔园的柑桔根上。雌虫的会阴花纹近圆形,线纹平滑、纤细,背腹线纹通常连贯。以尾尖处向两侧有脊状放射形条纹,条纹数目不定、在阴肛区的背侧有半圈脊状条纹。在放射状的条纹间,线纹有时不连贯,有如许多小刻点。尾觉器距离很近。雄虫头冠高,唇盘和中唇融合,无侧唇。口针长19.1—26.0(21.8μm)。口针基球和杆部界限明显。背食道腺开口距口针基部2.5—3.5(3.0μm)。侧带处有4条侧线,两边两条间有横纹,中间两条侧线间无横纹。二龄幼虫长387.6—483.3(423.2)μm。头冠高,唇盘和中唇融合成哑铃状。口针长13.0—16.8(15.1)μm。背食道腺开口距口针基部2.1—3.7(2.5)μm。尾部渐细,尾尖钝圆。简阳根结线虫雌虫的主要酯酶带Rf=0.41、0.45和0.48。
Terminal mucro of adult female was the distinct character between Bursaphelenchus xylophilus (Bx) and its allied species Bursaphelenchus mucronatus(Bb). In general, Bx had no mucro. But it could have mucro in some situations. In the test, Bx without mucro was inoculated on Chineses pine (Pinus tabulaeformis) and Japanese black pine (Pinus thunbergii). The results showed that 85% of adult females Bx isolated from Chinese pine had terminal mucro. On Japanese black pine only 4.2% of adult females Bx had terminal mucro. Bx with terminal mucro from Chinese pine was re-inoculated on the fungus, Pestalotia sp. and Japanese black pine. It was found that 100% adult females had no terminal mucro on the fungus and 3.4% with terminal mucro on Japanese black pine.
本文报道来自四川省26个县市的78份柑桔园土壤样本的植物线虫种类鉴定结果。共鉴定出16个种,其中新种3个:简阳根结线虫(Meloidogyne jianyangensis Yang,Hu & Chen)、合川沟环线虫(Ogma hechuanensis Hu & Zhu)、陈氏拟盘旋线虫(Rotylenchoides cheni n. sp. )。新纪录1个,即Rotyleachus devonensis Van de Berg。分别介绍了每个种的分类地位和分布地区,并明确柑桔根线虫(Tylenchulus semipenetrans Cobb)和简阳根结线虫可寄生于柑桔,而其他种的寄生性有待观察。
