Abstract: In order to determine the effects of Scopolamine,Anisodamine,Hyoscyamine and Anisodine on egg masses,eggs hatching and 2nd instar larvae survival of Meloidogy incognita,these alkaloids with different concentrations and times were tested in the laboratory by dipping method.The results showed that alkaloids had strong inhibition abilities to eggs,egg masses hatching and the mortality to J₂.The hatching ratio and J₂ mortality were significantly enhanced with the increase of treating concentrations and times.0.6 mg/mL Anisodamine demonstrated the highest inhibition effect on egg masses hatching with the inhibition ratio was 95% after 48 h.0.6 mg/mL Scopolamine showed the highest inhibition effect on egg hatching with the inhibition ratio was 82.43% after 36 h and 98.5% after 48 h,respectively.The adjusted mortality of four kinds of alkaloids to J₂ with 1.0 mg/mL concentration reached 100%.Alkaloids with different concentrations and times had mortality effects to J₂ and had different LC₅₀.Scopolamine showed the smallest LC₅₀,which reached 0.480 7 mg/mL.These results demonstrated that Scopolamine had the strongest mortality effect to J₂ of M.incognita.And J₂ of M.incognita had the highest sensitivity to Scopolamine.

Key words: Meloidogyne incognita, Hyoscyamus, Alkaloids, Hatch, Survival

CLC Number: 

• S432.4+5