Abstract
The fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), is a polyphggous and widespread insect pest. In the study, the biological characteristics and nutritional indices of S. frugiperda fed on six crops, namely corn, sorghum, wheat, soybean, peanut, and cotton, were investigated under laboratory conditions. These crops are cultivated mainly in the mid-high latitude of China. Results showed that S. frugiperda was able to develop and reproduce on all six tested plants. Larvae reared on corn exhibited a significant shorter larval and pupal duration, higher pupal weight, and higher fecundity, which were 16.2 d, 8.9 d, 0.248 g, and 979.4 eggs per female, respectively. The host plant significantly affected relative growth, consumption, and metabolic rates, as well as other nutritional indices. Biology and nutritional indexes suggested that corn was the most suitable host. Besides, peanut, sorghum, and wheat have also been shown to be the suitable hosts for S. frugiperda. Although cotton and soybean were found to be less adequate, high larval and pupal survivors recorded on cotton and soybean leaves have indicated that damage may occur in these plants. This work reveals the damage risk of potential hosts of S. frugiperda, lays the foundation for the design of pest management strategies.
Highlights
The host plant had a significant impact on the growth and development of S. frugiperda
There were no significant difference in female (F5,114 = 0.86, P = 0.322) and male longevity (F5,114 = 0.54, P = 0.645), the longevity of female was about 1.5 days longer than male adult (Figure 4).The number of eggs per female was significant influenced by host plant (F5,114 = 21.25, P < 0.001)
By comparing the biological characteristics, food consumption and utilization of S. frugiperda larvae fed on six different crops mainly cultivated in the mid-high latitude of China, significant differences were identified
Summary
E. Smith), is an important polyphagous pest native to tropical and subtropical regions of the Americas (Sparks, 1979; Nagoshi et al, 2017). Smith), is an important polyphagous pest native to tropical and subtropical regions of the Americas (Sparks, 1979; Nagoshi et al, 2017) It is widely distributed throughout the United States, Puerto Rico, Mexico, Brazil, and Argentina (Clark et al, 2007). In January 2016, S. frugiperda was detected in western Africa (Goergen et al, 2016; Nagoshi et al, 2018). In January 2019, S. frugiperda was first observed in Yunnan Province, southwest of China, and subsequently invaded 26 different provinces except for Xinjiang, Qinghai, and northeastern China (Guo et al, 2018; Jing et al, 2020). S. frugiperda has been confirmed in eastern and southern Asian countries (Sun et al, 2019; Li et al, 2020)
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