Screening of Corn Endophyte Strains against Rhopalosiphum maidis

doi:10.16409/j.cnki.2095-039x.2019.04.013

Abstract

Abstract: To explore new strategies for sustainable control of corn aphid Rhopalosiphum maidis (Fitch) population, 61 endophyte strains were collected from the major corn producing areas in Shandong province, and their control efficacies against R. maidis were determined under laboratory conditions to screen the highly effective strains. Meanwhile, the effects and rates of colonization of the strains in different tissues of corn were detected. The results showed that strains YC1 and GX5 had the best control efficacy of 74.80%, with rates of no-damage plants of 32.22% and 55.64%, respectively. The biomass of corn tissues inoculated with stains YC1 and GX5 were higher than the control, dry weight of the root, stem and leaf of the YC1 treatment group increased by 9.64%, 15.71% and 20.51%, respectively, and that of the GX5 treatment group increased by 3.88%, 8.16% and 9.14%, respectively. The colonization rates of strain GX5 in roots, stems and leaves were more than 44.23%, and the colonization rate of YC1 in stems was more than 63.44%. The results show that the strains GX5 and YC1 have great application potential.

Key words: Rhopalosiphum maidis, corn endophyte, strain screening, Beauveria, Alternaria

CLC Number:

S476.1

SUN Yixin, MEN Xingyuan, LI Chao, YU Yi, Lü Suhong, SUN Tinglin, YE Baohua, LI Lili. Screening of Corn Endophyte Strains against Rhopalosiphum maidis[J]. Chinese Journal Of Biological Control, 2019, 35(4): 570-575.

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