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Spread of invasive migratory pest Spodoptera frugiperda and management practices throughout China

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Journal of Integrative Agriculture 2021年第3期20卷 637-645页

作者： ZHOU Yan wu Qiu-lin ZHANG Hao-wen wu kong-ming State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China

The fall armyworm(FAW),Spodoptera frugiperda(***)(Lepidoptera:Noctuidae),a notorious migratory pest native to tropical and subtropical America,invaded China in December 2018,then spread through 26 provinces(autonomous regions,municipalities)in 2019 and 27 in 2020,damaging 1.125 and 1.278 million hectares of crops,*** was the most severely affected crop,although wheat and other plants were also *** the biological characteristics,incidence regularity and migration patterns of the FAW populations,Chinese government implemented a regional control strategy and divided the areas infested with FAW into the annual breeding grounds in Southwest and South China,the transitional migration area in Jiangnan and Jianghuai and the key preventive area in the Huang-Huai-Hai region and North *** National Agro-Tech Extension and Service Center constructed"the National Information Platform for the Prevention and Control of the Fall Armyworm"at the county level,which would entail people reporting and mapping the spread of fall *** to forecasting information,millions of extension workers and small-scale growers in entire country were rallied by local governments to fight the pest through comprehensive control tactics including chemical,physical,biological and ecological *** to the joint prevention and control,the final loss of crops infested was controlled within 5%of the total in 2019 and *** review also gives a discussion on existing problems and future management scenarios.

关键词： Spodoptera frugiperda genetic characteristics occurrence and damage monitoring and early-warning control measures

Ovipositional responses of Spodoptera frugiperda on host plants provide a basis for using Bt-transgenic maize as trap crop in China

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Journal of Integrative Agriculture 2021年第3期20卷 804-814页

作者： HE Li-mei ZHAO Sheng-yuan GAO Xi-wu wu kong-ming State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China College of Plant Protection China Agricultural UniversityBeijing 100193P.R.China

Spodoptera frugiperda,the pest fall armyworm(FAW),is widespread in more than 100 *** date,planting insectresistant transgenic crops is one of the main control methods in its native *** this study we evaluated Bt-transgenic maize(Bt maize)and non-transgenic(conventional)maize and six other host plants in greenhouse pot experiments and field trials for oviposition preference by the Chinese populations of *** laboratory trials,female moths preferred to oviposit on maize with no significant preference between conventional and Bt ***,after conventional and transgenic maize were exposed to FAW larvae and damaged,oviposition was significantly higher on transgenic maize than on the conventional *** trials showed that for plants less damaged at an early stage(seedling stage),oviposition of FAW on transgenic and conventional maize was significantly higher than that on wheat,sorghum,foxtail millet,peanut and soybean while showing no significant difference between transgenic or conventional *** adults mainly laid eggs on Bt maize,while the larval density and leaf damage rating or percentage of damaged plants were significantly lower than on conventional *** density and its damage on conventional maize were significantly higher than that on Bt maize and the other five ***,maize is a highly preferred and suitable host for *** feeding and ovipositing,and Bt maize can be used as trap crop to protect other crops.

关键词： fall armyworm oviposition behavior trap crop Bt maize

Searchlight trapping reveals seasonal cross-ocean migration of fall armyworm over the South China Sea

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Journal of Integrative Agriculture 2021年第3期20卷 673-684页

作者： ZHOU Xian-yong wu Qiu-lin JIA Hui-ru wu kong-ming College of Plant Protection Southwest UniversityChongqing 400716P.R.China State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese

The fall armyworm(FAW),Spodoptera frugiperda,is a migratory noctuid pest that has recently invaded eastern *** 2017 up till 2020,searchlight trapping was used to assess the extent of FAW migration across the South China *** and morphology-based identification confirmed that FAW made its first appearance on Yongxing Island on 11 April 2019,with most trapped individuals belonging to the ***"corn-strain".Carbon isotope analysis further showed that FAW moths originated from C4 host plants,while trajectory analyses revealed that migratory *** adults are able to cross the South China Sea and enter China's *** long-distance migration process plausibly results in frequent genetic mixing between domestic FAW populations and those of neighboring Southeast Asian ***,this work provides unique insights into FAW migration across eastern Asia and ultimately can help advance pest forecasting,risk assessment and area-wide pest management.

关键词： Spodoptera frugiperda host strain isotope trajectory analysis cross-ocean migration invasion biology

Insecticide resistance monitoring for the invasive populations of fall armyworm,Spodoptera frugiperda in China

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Journal of Integrative Agriculture 2021年第3期20卷 783-791页

作者： ZHANG Dan-dan XIAO Yu-tao XU Peng-jun YANG Xian-ming wu Qiu-Iin wu kong-ming Sfafe Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China Agricultural Genomics institute at Shenzhen Chinese Academy of Agricultural SciencesShenzhen 518120P.R.China Tobacco Research Institute Chinese Academy of Agricultural SciencesQingdao 266101P.R.China

Fall armyworm has invaded China and colonized its populations in tropical and sub-tropical regions of South China since December *** spray has been widely used to control the pest,which shall lead to resistance *** this research,we collected five populations of the pest from Yunnan,Hainan,Tibet,and Fujian of China,and tested their susceptibilities to pyrethroid,organophosphorus,oxadiazine,diamide,antibiotics and other types of insecticides(14 insecticides totally)in the *** on the susceptible baseline published from the previous studies,the resistance ratio was 615-1068-fold to chlorpyrifos,60-388-fold to spinosad,26-317-fold to lambda-cyhalothrin,13-29-fold to malathion,9-33-fold to fenvalerate,8-20-fold to deltamethrin,3-8-fold to emamectin benzoate and 1-2-fold to chlorantraniliprole,*** median lethal concentration(LC_(50))of other six insecticides without the susceptible baselines was 148.27-220.96μgmL^(-1) for beta-cypermethrin,87.03-128.43μgmL^(-1) for chlorfenapyr,16.35-99.67μgmL^(-1) for indoxacarb,10.55-51.01μgmL^(-1) for phoxim,7.08-8.78μgmL^(-1) for M-EBI(the mixed insecticide of emamectin benzoate and indoxcarb)and 1.49-4.64μg mL^(-1) for *** study can be helpful for chemical control as well as for resistance monitoring and management of the pest in China.

关键词： Spodoptera frugiperda insecticides resistance monitoring China

Cold hardiness of the invasive fall armyworm,Spodoptera frugiperda in China

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Journal of Integrative Agriculture 2021年第3期20卷 764-771页

作者： ZHANG Dan-dan ZHAO Sheng-yuan wu Qiu-lin LI Yu-yan wu kong-ming State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China

Fall armyworm,Spodoptera frugiperda(***,1797),a crop pest native to tropical and subtropical regions of America,has invaded and spread into most regions in China,posing a severe threat to China’s *** cold hardiness directly determines its geographic distribution through adapting to winter temperatures of different ***,we measured supercooling points and lethal time(LT)at low temperatures of *** supercooling points for developmental stages in increasing order were:adults(-15.05℃)

关键词： Spodoptera frugiperda supercooling point overwinter China

Emergence,Mating and Oviposition Behavior of the Chinese Population in Pink Bollworm,Pectinophora gossypiella (Lepidoptera:Gelechiidae)

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Journal of Integrative Agriculture 2013年第4期12卷 653-662页

作者： wu Huai-heng HUANG Min-song WAN Peng Kris A G Wyckhuys wu kong-ming State Key Laboratory for Biology of Plant Diseases and Insect Pests/Institute of Plant Protection Chinese Academy of Agricultural Sciences Institute of Plant Protection and Soil Fertilizer Hubei Academy of Agricultural Sciences International Center for Tropical Agriculture CIAT-Asia

The pink bollworm, Pectinophora gossypiella （Lepidoptera： Gelechiidae） is one of the most serious lepidopteran pests of cotton in the world. This pest invaded China at the onset of the 20th century, possibly through repeated introductions from several different locations worldwide. In this paper, we describe different behavioral parameters of this Hubei P. gossypiella strain under laboratory and field conditions. Using an infra-red video recorder, we observed （nocturnal） emergence, flight and mating activities, and oviposition patterns. Moth emergence started from 13：00 and continued up till 23：00. Under laboratory and field conditions, 2-7-d-old moths initiated flight around sunset, peaked 50 rain later and gradually declined until 04：00. Although mating started immediately after darkness （i.e., 20：00）, mating behavior was most intense from 23：00 to 03：40. Oviposition also showed distinct time-related patterns, with approx. 70% eggs laid between 20：00 and 22：00. In the studies of the relationship between flight and oviposition, the duration of flight had an effect on oviposition. The 1-d-old moths flown for 6 and 12 h began oviposition earlier than the unflown ones, and the 6-h flight had no effect on the egg production. However, the longevity of the flown moths was shortened after flight. In addition, the peaks of oviposition for the flown moths were advanced 2-3 d. The age when the moths flied affected the oviposition of adult moths. The earlier the moths started to fly after emergence, the greater the fecundity they had. The average egg production of moths flown for 24 h was less than that of non-flown moths which were of the same age. Both flight and delay in mating could advance the oviposition peak. Our study provides detailed insights in nocturnal activities and the reproductive biology of local P. gossypiella populations, which could be employed to fine-tune current pest management programs in China.

关键词： Pectinophora gossypiella nocturnal activities emergence mating oviposition

Genome editing of the SfABCC2 gene confers resistance to Cry1F toxin from Bacillus thuringiensis in Spodoptera frugiperda

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Journal of Integrative Agriculture 2021年第3期20卷 815-820页

作者： JIN ming-hui TAO Jia-hui LI Qp CHENG Ying SUN Xiao-xu wu kong-ming XIAO Yu-tao Agricultural Genomics Institute at Shenzhen Chinese Academy of Agricultural SciencesShenzhen 518120P.R.China State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China

ATP-binding cassette transporter C2(ABCC2)is known to be a receptor for Bacillus thuringiensis(Bt)toxins in several lepidopteran *** in the ABCC2 gene have been genetically linked to field-evolved resistance to the Cry1 F toxin from Bt in Spodoptera *** we generated a SfABCC2 knockout strain of *** using the CRISPR/Cas9 system to provide further functional evidence of the role of this gene in susceptibility and resistance to Cry1 *** from bioassays showed that the SfABCC2 knockout *** strain displayed 118-fold resistance to Cry1 F compared with the parental DH19 strain,but no resistance to Vip3 A toxin from *** results provide the first reverse genetic evidence for SfABCC2 as a functional receptor for Cry1 F.

关键词： Spodoptera frugiperda ABCC2 CRISPR/Cas9 Bt receptor Cry1F

Lethal and Sub-Lethal Effects of Transgenic Rice Containing cry1Ac and CpTI Genes on the Pink Stem Borer, Sesamia inferens(Walker)

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Agricultural Sciences in China 2011年第3期10卷 384-393页

作者： HAN Lan-zhi HOU Mao-lin wu kong-ming PENG Yu-fa WANG Feng State Key Laboratory of Plant Disease and Insect Pests/Institute of Plant Protection Chinese Academy of Agricultural Sciences Beijing 100193P. R. China Key Laboratory of Agricultural Genetics Engineering Fujian Academy of Agricultural Sciences Fuzhou 350003 P.R.China

Lethal and sub-lethal effects of transgenic rice containing cry1Ac and CpTI genes on the pink stem borer, Sesamia inferens, were studied to collect information for ecological risk assessment on insect-resistance of transgenic rice. In vitro insect-feeding bioassays were conducted to evaluate the lethal and sub-lethal effects of transgenic rice lines （II YouKF6 and KF6） containing cry1Ac＋CpTI genes on S. inferens at four different growth stages, viz., seedling, tillering and elongation, booting, and milk and maturing. Transgenic rice at seedling stage showed significantly high lethal effect on S. inferens with the shortest lethal duration for 50 and 100% individuals and the highest corrected mortalities after feeding on transgenic lines at this stage for 3 and 6 d. Followed by tillering and elongation stage, 50 and 100% S. inferens were dead after feeding on transgenic lines at this stage for 4 and 10 d, respectively. Moreover, corrected mortalities for 6 d feeding on transgenic lines at this stage were significantly higher than that at booting, and milk and maturing stages. Lethal effect of KF6 on S. inferens decreased significantly at booting stage. Lethal duration for 50% S. inferens significantly extended and its corrected mortalities for 6 d feeding also declined remarkably. However, lethal effect of II YouKF6 on S. inferens did not decrease significantly at this stage. Transgenic rice at booting, and milk and maturing stages did not show significant lethal effect to S. inferens and it showed the longest lethal duration for 50% individuals and the lowest corrected mortalities for 3 and 6 d feeding. A few larvae of S. inferens could survive, pupate and emerge on these two transgenic lines at booting, and milk and maturing stages. Sub-lethal effect of two transgenic lines on S. inferens also differed significantly between different developmental stages. Continuously feeding on transgenic rice lines at seedling, and tillering and elongation stages delayed the devel

关键词： transgenic rice Sesamia inferens lethal and sub-lethal effect

Accurate recognition of the reproductive development status and prediction of oviposition fecundity in Spodoptera frugiperda(Lepidoptera:Noctuidae)based on computer vision

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Journal of Integrative Agriculture 2023年第7期22卷 2173-2187页

作者： LÜChun-yang GE Shi-shuai HE Wei ZHANG Hao-wen YANG Xian-ming CHU Bo wu kong-ming Key Laboratory of Agricultural Information Service Technology Ministry of Agriculture and Rural AffairsAgricultural Information InstituteChinese Academy of Agricultural SciencesBeijing 100081P.R.China State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops Institute of Applied EcologyFujian Agriculture and Forestry UniversityFuzhou 350002P.R.China College of Plant Protection Henan Agricultural UniversityZhengzhou 450002P.R.China

Spodoptera frugiperda(Lepidoptera:Noctuidae)is an important migratory agricultural pest worldwide,which has invaded many countries in the Old World since 2016 and now poses a serious threat to world food *** present monitoring and early warning strategies for the fall army worm(FAW)mainly focus on adult population density,but lack an information technology platform for precisely forecasting the reproductive dynamics of the *** this study,to identify the developmental status of the adults,we first utilized female ovarian images to extract and screen five features combined with the support vector machine(SVM)classifier and employed male testes images to obtain the testis circular ***,we established models for the relationship between oviposition dynamics and the developmental time of adult reproductive organs using laboratory *** results show that the accuracy of female ovary development stage determination reached 91%.The mean standard error(MSE)between the actual and predicted values of the ovarian developmental time was 0.2431,and the mean error rate between the actual and predicted values of the daily oviposition quantity was 12.38%.The error rate for the recognition of testis diameter was 3.25%,and the predicted and actual values of the testis developmental time in males had an MSE of 0.7734.A WeChat applet for identifying the reproductive developmental state and predicting reproduction of *** was developed by integrating the above research results,and it is now available for use by anyone involved in plant *** study developed an automated method for accurately forecasting the reproductive dynamics of *** populations,which can be helpful for the construction of a population monitoring and early warning system for use by both professional experts and local people at the county level.

关键词： Spodoptera frugiperda computer vision ovary testis WeChat applet