Effect of Different Anaerobic Soil Disinfestation by Organic Materials on the Occurrence of Root-knot Nematode Disease, Yield and Quality of Flue-cured Tobacco

PurposeIn order to reduce the occurrence of soil-borne diseases effectively, and to reduce the application of pesticides for guarantee the normal production of flue-cured tobacco in Yunnan.

MethodsThe study was focused on the effects of different anaerobic soil disinfestation by organic materials, including corn straw (RS), rotten pig manure (RP) and Vicia villosa (RV) respectively, on the occurrence of root-knot nematode, root black rot and yield, output value and quality of flue-cured tobacco leaves in 2 years.

ResultsAfter anaerobic disinfection, the pH and EC values of the soil before transplanting were increased in different degrees compared with the control, and there were significant difference among RS, RV treatments and the control. The occurrence of root-knot nematode in three materials treated with anaerobic disinfection was lower than that of control, especially in RS and RV treatments (P<0.05). There was no significant difference in the incidence of root black rot between different materials treated and control (P>0.05), but the disease index of root black rot in RS and RV treatments were lower than that of control, especially in RV treatment (P<0.05). The yield and value of flue-cured tobacco treated with RS and RV were significantly higher than those treated with control and RP, while the chemical composition coordination of flue-cured tobacco treated with RP and RV was relatively better. The results of the two-year trial were consistent.

ConclusionIn summary, anaerobic disinfection of V. villosa has obvious affection on controlling root-knot nematode and increased production and income, which could be applied in production.