Field population dynamics analysis and biotype identification of Spodoptera frugiperda in Hangzhou, China

doi:10.3969/j.issn.1004-1524.2023.05.15

Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (5): 1116-1122.DOI: 10.3969/j.issn.1004-1524.2023.05.15

• Plant Protection • Previous Articles Next Articles

Field population dynamics analysis and biotype identification of Spodoptera frugiperda in Hangzhou, China

WANG Guodi¹(), FENG Hangli²^,³, WU Taoqi², WANG Yanxin¹, WU Huiming², RAO Qiong², ZHANG Lili¹^,^*()

1. Hangzhou Agricultural Technology Extension Center, Hangzhou 310020, China
2. Zhejiang Provincial Key Laboratory for Agricultural Product Quality Improvement Technology Research, College of Advanced Agricultural Sciences, Zhejiang A & F University, Hangzhou 311300, China
3. Jinhua Heng’an Biotechnology Co., Ltd., Jinhua 321000, Zhejiang, China

Received:2022-09-06 Online:2023-05-25 Published:2023-06-01

Abstract

Abstract:

The armyworm Spodoptera frugiperda, which invaded China in January 2019, has been an outbreak in many provinces of China, causing a great impact on food security production. In order to determine the distribution and occurrence regularity of S. frugiperda in the field of Hangzhou, Zhejiang Province, monitoring sites were set up to monitor the population of S. frugiperda in different maize planting areas from 2019 to 2021, and the biotypes of S. frugiperda were identified by molecular biological methods. The results showed that S. frugiperda mainly distributed in Hangzhou area was identified as a hybrid of maize-type and rice-type by molecular identification, and its feeding preference was maize leaves. In 2019, S. frugiperda infestations occurred in many areas in Hangzhou, especially in September to November. The highest number of trapped male moths in a single trap was 388 moths per week. The occurrence of S. frugiperda in Hangzhou decreased significantly in 2020 and 2021. The highest number of trapped male moths in a single trap was 174 moths per week and 29 moths per week respectively.

Key words: Spodoptera frugiperda, biotype, field trapping, occurrence dynamics, Hangzhou

CLC Number:

WANG Guodi, FENG Hangli, WU Taoqi, WANG Yanxin, WU Huiming, RAO Qiong, ZHANG Lili. Field population dynamics analysis and biotype identification of Spodoptera frugiperda in Hangzhou, China[J]. Acta Agriculturae Zhejiangensis, 2023, 35(5): 1116-1122.

Figures/Tables 4

Fig.1 Dynamics of trapped S. frugiperda in the field in Hangzhou from 2019 to 2021 (Unit: male moths/trap)

Fig.2 Phylogenetic analysis of S. frugiperda based on COI gene sequences RS is a rice type, CS is a maize type, HZ strain1 and HZ strain2 are the experimental populations, and Bombyx mori is the outgroup.

Fig.3 Haplotype loci analysis based on Tpi gene fragments HZ-Strain1 and HZ-Strain2 in the figure are samples for this experiment; The red arrow indicates the genetic differences between maize and rice types.

Fig.4 Feeding rate of Spodoptera frugiperda on two host plants The data in the figure is the average ± standard error. ** represents significant differences between the two.

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Field population dynamics analysis and biotype identification of Spodoptera frugiperda in Hangzhou, China

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