Spatial and temporal patterns of rice planthopper populations in South and Southwest China

Zhang, Hongguo; He, Bin; Jin, Xing; Lu, Ming-Hong

doi:10.1016/j.compag.2022.106750

Cited by 8 publications

(10 citation statements)

References 57 publications

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“…The highest number of WBPH was caught in 2021 (289), whereas no individuals were captured in 2014. The highest number of natural enemies was caught in 2017 (741), and the lowest was caught in 2019 (22). The weekly mean biomass of SBPH was positively correlated with that of H. axyridis (r = 0.614, P = 0.001) and negatively correlated with that of C. pallens (r = −0.456, P = 0.038).…”

Section: Abundances and Interactions Between Rice Planthoppers And Na...mentioning

confidence: 99%

“…Over the past two decades, large‐scale outbreaks of rice planthoppers in Asian countries have seriously threatened rice production and global food security 17–19 . In general, rice planthoppers migrate northwards or northeastward from tropical and subtropical regions in spring and summer, and then, the offspring migrate southwestward to overwintering regions in autumn 9,16,20–22 . SBPHs are mainly distributed in temperate, tropical and subtropical zones 12 .…”

Section: Introductionmentioning

confidence: 99%

“…[17][18][19] In general, rice planthoppers migrate northwards or northeastward from tropical and subtropical regions in spring and summer, and then, the offspring migrate southwestward to overwintering regions in autumn. 9,16,[20][21][22] SBPHs are mainly distributed in temperate, tropical and subtropical zones. 12 Nevertheless, with global climate warming and adjustments to agricultural planting structure in recent years, SBPH has already spread over most of the rice-producing areas of China, where it has caused severe economic losses.…”

Section: Introductionmentioning

confidence: 99%

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Comigration and interactions between two species of rice planthopper (Laodelphax striatellus and Sogatella furcifera) and natural enemies in eastern Asia

Wang

et al. 2023

Pest Management Science

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BackgroundNatural enemies are important in pest control. However, control by natural enemies is hindered by the migration of rice planthoppers. Therefore, comigration and interactions between Laodelphax striatellus (Fallén) and Sogatella furcifera (Horváth) and five predator species, Chrysoperla sinica Tjeder, Harmonia axyridis (Pallas), Episyrphus balteatus, Syrphus corollae (Fab.) and Chrysopa pallens (Rambur) in eastern Asia were investigated.ResultsFrom 2012 to 2021, the migration patterns of two rice planthoppers and five natural enemy species were monitored by suction trapping on Beihuang Island, Shandong Province, China. Both planthoppers and the five natural enemies regularly comigrated from late April to late October each year. There were significant interannual and seasonal differences in the numbers of two rice planthoppers migrating across this island. Simulated seasonal migration trajectories indicated different source areas for the two rice planthoppers, which mainly originated in northeast, north and east China. The biomass of planthoppers was significantly positively correlated with that of the ladybug H. axyridis in all migration periods, and significant differences in the ratio of rice planthoppers to natural enemies among months. A time‐lag effect between seasons was obtained when natural enemies and pests comigrated.ConclusionMigration was coordinated between rice planthoppers and natural enemies in East Asia. When natural enemies and rice planthoppers comigrated, time lags between seasons were observed. The unique insights into the migration patterns will help to increase understanding of the occurrence of rice planthoppers in eastern Asia and provide an important theoretical basis for regional monitoring and management of rice planthoppers. © 2023 Society of Chemical Industry.

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Section: Abundances and Interactions Between Rice Planthoppers And Na...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comigration and interactions between two species of rice planthopper (Laodelphax striatellus and Sogatella furcifera) and natural enemies in eastern Asia

Wang

et al. 2023

Pest Management Science

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“…The brown planthopper (BPH), Nilaparvata lugens (Stål) (Hemiptera: Delphacidae), is an important migratory rice pest in the Yangtze River Valley, in South and Southwest China [1,2]. There are three main ways in which BPH damages rice plants.…”

Section: Introductionmentioning

confidence: 99%

Resistance Monitoring of <em>Nilaparvata lugens</em> to Pymetrozine Based on Reproductive Behavior

Song¹,

Peng²,

Gao³

et al. 2023

Preprint

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To explore the effects of pymetrozine on the reproductive behavior of N. lugens, we established a bioassay method to accurately evaluate the toxicity of pymetrozine in N. lugens and establish the level of pymetrozine resistance of N. lugens in the field. In this study, pymetrozine’s effects on the fecundity of N. lugens were evaluated using the topical application method and rice-seedling dipping method. Moreover, the resistance of N. lugens to pymetrozine in a pymetrozine-resistant strain (Pym-R) and two field populations (YZ21 and QS21) was determined using the rice-seedling dipping method and fecundity assay methods. The results showed that treatment of N. lugens third-instar nymphs with LC15, LC50, and LC85 doses of pymetrozine resulted in significantly reduced male fertility and female fecundity. In addition, N. lugens adults treated with pymetrozine using the rice-seedling dipping and topical application method also exhibited significantly in-hibited male courtship, fertility, and female receptivity. Using the rice-stem dipping method, pymetrozine resistance was shown to be at high levels in Pym-R (194.6-fold), YZ21 (205.9-fold), and QS21 (212.8-fold), with LC50 values of 522.520 mg/L (Pym-R), 552.962 mg/L (YZ21), and 571.315 (QS21) mg/L. However, when using the rice-seedling dipping or topical application fe-cundity assay method, Pym-R (EC50: 14.370 mg/L, RR=12.4-fold; ED50: 0.560 ng/adult, RR=10.8-fold), YZ21 (EC50: 12.890 mg/L, RR=11.2-fold; ED50: 0.280 ng/adult; RR=5.4-fold), and QS21 (EC50: 13.70 mg/L, RR=11.9-fold) exhibited moderate or low levels of resistance to pymet-rozine. Our studies show that pymetrozine can significantly inhibit the fecundity of N. lugens. The fecundity assay results showed that N. lugens only developed low to moderate levels of resistance to pymetrozine, indicating that pymetrozine can still achieve effective control on the next gen-eration of N. lugens populations.

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“…1,3 However, diverse agricultural pests severely affected rice yields and quality, posing primary intimidation to food security and safety. Among these agricultural pests, rice planthoppers have become the most destructive injurious insects in rice fields in China, [4][5][6] and many insecticides have been registered to control rice planthoppers.…”

Section: Introductionmentioning

confidence: 99%

Dissipation, residue distribution, and risk assessment of ethiprole and its metabolites in rice under various open field conditions

Dong

2023

J Sci Food Agric

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BACKGROUNDEthiprole has been registered to control planthoppers in rice fields for many years in Asia. However, its dissipation and residues in rice under natural field conditions and health hazards are largely unclear. In the present study, a modified QuEChERS (i.e. Quick Easy Cheap Effective Rugged Safe) and high‐performance liquid chromatography‐tandem mass spectrometry method was established to detect ethiprole and its metabolites, ethiprole amide and ethiprole sulfone, in brown rice, rice husks, and rice straw. The field experiments were implemented in 12 representative provinces of China under Good Agricultural Practices aiming to investigate the fate and terminal residues of ethiprole and its metabolites in rice. Finally, the dietary risk of ethiprole was evaluated.RESULTSThe average recoveries of these analytes in all matrices were 86.4–99.0% with a repeatability of 0.575–9.38%. The limits of quantification for each compound were 0.01 mg kg−1. Dissipation of ethiprole followed the single first‐order, first + first‐order, and first‐order multi‐compartment kinetic models with a half‐life of 2.68–8.99 days in rice husks. The dissipation half‐life of ethiprole combining all metabolites was 5.20–16.2 days in rice husks. The terminal residues of ethiprole and its metabolites at preharvest intervals of 21 days were < 0.011, 0.25, and 0.20 mg kg−1 in brown rice, rice husks, and rice straw, respectively. Ethiprole amide was undetectable in all matrices, and the risk quotient of ethiprole was far less than 100%.CONCLUSIONEthiprole rapidly converted to ethiprole sulfone in rice, and ethiprole and ethiprole sulfone mainly remained in rice husks and straws. The dietary risk of ethiprole was acceptable for Chinese consumers. © 2023 Society of Chemical Industry.

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Spatial and temporal patterns of rice planthopper populations in South and Southwest China

Cited by 8 publications

References 57 publications

Comigration and interactions between two species of rice planthopper (Laodelphax striatellus and Sogatella furcifera) and natural enemies in eastern Asia

Comigration and interactions between two species of rice planthopper (Laodelphax striatellus and Sogatella furcifera) and natural enemies in eastern Asia

Resistance Monitoring of <em>Nilaparvata lugens</em> to Pymetrozine Based on Reproductive Behavior

Dissipation, residue distribution, and risk assessment of ethiprole and its metabolites in rice under various open field conditions

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