Dimethyl disulfide (DMDS) as an effective soil fumigant against nematodes in China

Abstract

Root-knot nematode is an important soil pest in horticulture crops and constrains the protected cultivation development after methyl bromide (MB) was phased out in China. Dimethyl disulfide (DMDS) exhibits excellent efficacy against nematodes. Laboratory experiments and field trials were set up to clarify DMDS dose, efficacy, and yield. A dose-response experiment using three methods showed that DMDS presented high efficacy against the nematode Meloidogyne incongnita. The LC50 values of direct fumigation activity in the dessicator method were 0.086 and 0.070 mg L-1 for DMDS and 1,3-D, 29.865 and 18.851 mg L-1 for DMDS and 1,3-D of direct contact activity in the small tube method, 6.438 and 3.061 mg L-1 for DMDS and 1,3-D of soil fumigation activity in the soil fumigation method, respectively. The field trials indicated that DMDS showed an excellent efficacy of 80%−94% on root-knot nematode applied at 10−100 g m−2 on tomato in Tongzhou, Beijing. The crop yields showed no significant difference after applying 10–80 g m-2 DMDS. Results indicate that DMDS applied at 10 g m-2 for controlling root-knot nematode in Beijing is cost effective. In conclusion, DMDS is an excellent soil fumigant that can be used for controlling root-knot nematode and can be an potential novel alternative to MB in China.

Basidiomycetes Are Particularly Sensitive to Bacterial Volatile Compounds: Mechanistic Insight Into the Case Study of Pseudomonas protegens Volatilome Against Heterobasidion abietinum

“…In the Pseudomonas genus, the production of volatiles such as dimethyl sulfide, dimethyl trisulfide, S -methyl thioacetate, methyl thiocyanate, 1-undecan, and HCN is a conserved trait and depends on the GacS/GacA two-component regulatory system ( Cheng et al, 2016 ; Ossowicki et al, 2017 ). It is worthy of noting that dimethyl disulfide has been used as a pre-plant soil fumigant against nematodes, weeds, and soil-borne plant pathogens ( Wang et al, 2009 ; Leocata et al, 2014 ; Mao et al, 2019 ; Yan et al, 2019 ). It acts by inducing mitochondria dysfunction, activation of ATP-sensitive potassium channels, and inhibition of cytochrome oxidase ( Auger et al, 1989 ; Van Wambeke et al, 2009 ).…”

“…Several compounds such as hydrogen cyanide (HCN), ammonia (NH3), 1-undecene, dimethyl disulfide, dimethyl trisulfide, and other volatiles have been identified in bacteria over years and often associated with the biocontrol of diverse plant pathogens ( De Vrieze et al, 2015 and references therein; Giorgio et al, 2015 ; Hunziker et al, 2015 ; Ossowicki et al, 2017 ; Guevara-Avenda[~no et al, 2019 ; Báez-Vallejo et al, 2020 ). Remarkably, dimethyl disulfide has found its application in agriculture as a novel soil fumigant ( Wang et al, 2009 ; Leocata et al, 2014 ; Mao et al, 2019 ; Yan et al, 2019 ).…”

Solvent‐Free Single‐Pot Mannich Reaction and Detoxification of Industrial Hazardous Waste Methyl Mercaptan Gas

“…Hence, there is necessity for development of a cost‐effective process for conversion of the waste methyl mercaptan gas to a useful product, which will generate wealth. Our third objective was conversion of hazardous methyl mercaptan to dimethyl disulfide which is used as herbicide, [31] food additive, [32] and soil fumigant [33] . We also report the conversion of the generated methyl mercaptan gas to dimethyl disulfide, followed by conversion to methane sulfonic acid during heating, in presence of catalytic amount of iodine in DMSO (Scheme 1).…”

Efficacy of a Soil Disinfection Machine for Fumigants to Clover Cyst Nematode

“…, 15 cm, 20 cm (Table 3) . Ou (2006) (vertually impermeable film, VIF) polyethylene film (PE) MNa , Yan (2019) . , MNa 1,3-D, chloropicrin (Desaeger , 2008…”