Effect of N-Viro soil and Amonia (NH3) on Egg Hatch of Soybean Cyst Nematode (SCN), Heterodera glycines Ichinohe

Year 2018, Volume: 12 Issue: 2, 45 - 48, 25.09.2018

Yaşar Alptekin

Abstract

The soybean cyst Nematode (SCN), Heteroderaglycines Ichinohe, is a devastating root pathogen of soybean. Symptoms of SCN can be confused with the symptoms of nutrient deficiencies, and chemical. Infected plants may exhibit chlorosis or be stunted. Chlorosis is caused primarily due to N deficiency as a result of suppression of Rhizobium nodule formation by the nematode infection.NVS is a municipal biosolid product in which human pathogens killed by an alkaline stabilization process combining alkaline pH, drying, high temperature, high ammonia and salts. Clear understanding of the mechanisms of egg hatch and environmental and chemical factors that influence egg hatch must be known to develope an effective management tactics for SCN. In this study, effects of N-viro leachates extracted from varying ages of N-viro soils and the impact of different concentrations of ammonia on the egg hatch of SCN in vitro were investigated. Age of N-viro soil was positivelly correlated with percent egg hatch of scn in vitro. Egg hatch of SCN was suppressed by the leachates from 0 to 1 month-old NVS in which cummulative percent egg hatch was 0, and 1.48, respectivelly. Egg hatch was not affected in leachates from 3, 6, and 12 month-old NVS or in 3 mM zinc sulfate solution compared to distilled water at 24 hr. Average cumulative percent egg hatch was 3.36, 3.52, and 4.60 in leachates of 3, 6, and 12 month-old NVS, respectively, at 24 hr. All the concentrations of ammonia (0.001, 0.01, and 0.1 M) significantly (P≤0.01) suppressed emergence of J2 juveniles from SCN eggs compared to distilled water and 0.02 M phosphate buffer at 48 hr.

Keywords

Soybean Cyst Nematode (SCN), Heteroderaglycines, N-viro soil (NVS), egg hatch

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