Toxicidal activity of eight kinds of nematicides against Meloidogyne incognita

doi:10.14088/j.cnki.issn0439-8114.2022.04.012

Abstract

Abstract: In order to screen out effective and low toxicity nematicides for control of tobacco root-knot nematode disease, toxicidal activity of eight hypotoxicity pesticides against the J₂larvae of Meloidogyne incognita was tested by pest-immersion method. The results showed that of above eight pesticides, the abamectin B₂, fosthiazate and fluopyram produced excellent toxicity, and all of the three pesticides caused 100.00% of corrected mortality with a concentration of 50 μg/mL at 24 h post-treatment. Further tests showed that abamectin B₂, fosthiazate and fluopyram produced 0.56, 8.30 and 6.24 μg/mL of LC₅₀ against J₂ larvae at 24 h post-treatment, correspondingly. Of the three pesticides, abamectin B₂ showed best toxicidal activity against the Meloidogyne incognita.

Key words: Meloidogyne incognita, nematicide, toxicidal activity, abamectin B₂

CLC Number:

S432.4⁺5

HE Yi, CAI Zhi-hao, LI Cai-bin, PENG Yu, LI Zhang-hai, HUANG Yan-zhang. Toxicidal activity of eight kinds of nematicides against Meloidogyne incognita[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(4): 70-73.

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