植物提取液对南方根结线虫的抑杀作用

Inhibition and nematocidal effect of plant extracts on Meloidogyne incognita

测定53种植物提取液对南方根结线虫2龄幼虫的毒杀效果,结果发现20种植物提取液具有较强的杀线虫活性,其中11种植物提取液能在24 h内杀死50％以上的线虫,如万寿菊、合欢、川楝子、白芥子等。测定24种植物提取液对南方根结线虫卵的影响,结果发现,有23种植物提取液对卵孵化有抑制作用,如百部、夹竹桃、合欢、白芥子等,以百部提取液抑制卵孵化效果最好,卵孵化抑制率达96.57％。有16种植物提取液对卵有毒杀作用,如合欢、野牵牛、细辛、蛇床子等,以合欢提取液杀卵效果最好,卵死亡率达81.41％。

Nematicidal effect of 53 plant extracts on the second juvenile of Meloidogyne incognita (J2) were determined , the results showed that 20 plant extracts had higher nematicidal activities against J2, in which 11 extracts could kill more than 50% of J2 in 24h, such as Tagetes erecta, Albizzia spp, Melia toosendan, Sinapis alba, etc. The inhibition effect of 24 plant extracts on eggs activities were also determined, the results showed that 23 plant extracts had inhibition on eggs hatch, such as Radix stemonae , Nerium indicum, Albizzia spp, Sinapis alba, etc, inhibition effect of Radix stemonae extract on eggs hatch was the highest, inhibition rate of eggs hatch was 96. 57% i 16 plant extracts had effect of killing eggs, such as Albizzia spp, Ipomoea triloba, Asarum sieboldii, Cnidium monnier, etc, in which Albizzia spp extract was the highest, egg mortility rate could reach 84- 41%.