Evalution of Bionematicides and Chemical Nematicides in Controlling Meloidogyne incognita on Grape, with Estimating Ethoprophos and Fenamiphos Residues and Chlorophyll Degree
Evalution of Bionematicides and Chemical Nematicides in Controlling Meloidogyne incognita on Grape, with Estimating Ethoprophos and Fenamiphos Residues and Chlorophyll Degree
Mohamed Adam1*, Hassan Sobhy2, Mohamed Abouzid3, Dalia Elhafny4 and El-Desouki Ibrahim5
ABSTRACT
The potential of bionematicides: Taglis 90% w/w (Tagetes sp. 80% andAlgaesea 10%) and bioniconemal (Pacilomyceslilacinus 2× 106cfu/ gm) was assessed to control the root- knot nematode Meloidogyne incognita on grape, in comparison with chemical nematicides: Nemacab (ethoprophos 20% Ec), Dento (fenamiphos 40% Ec) and Vaydate (oxamyl 24% Ec) during two successive seasons (2016 and 2017) under field conditions. Drenching of soil with a suspension of all tested products significantly reduced the nematodes populations in soil compared with the untreated control in both trails. Among chemical and bio-nematicides, there was no significant differences in their control potential towards M. incognita. The best bionematicide was Taglis causing over 85% reduction while the best chemical nematicide was Nemacab with over 94% reduction in nematode populations after two months from their application in 2016. The same trend in the control potential for each treatment was also obtained in 2017 experiment. The residues of ethoprophos and fenamiphos in leaves and fruits were not detected during the whole experiment. The amounts of ethoprophos and fenamiphos decreased from zero to 5 days from (4.88 to 3.61 ppm) and (15.25 to 7.31 ppm) with loss of 26.02% and 47.93 %, respectively. For all tested products, no impacts on Chlorophyll degree in leaves were detected when applied on the soil. From the result of this research, it is recommended that both bionematicides could be used for nematode control in different agricultural systems especially, sustainable and organic farming, while the three chemical nematicides could be used in conventional agriculture without any negative impacts on plant and soil.
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