Inhibition and nematocidal effect of plant extracts on Meloidogyne incognita

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%.