Periodic temperature-associated drought/flood drives locust plagues in China

Global warming is currently of great concern. Yet the ecological effects of low-frequency climate variations remain largely unknown. Recent analyses of interdecadal variability in population abundance of the Oriental migratory locust ( Locusta migratoria manilensis ) in China have revealed negative associations with temperature and positive associations with Yangtze drought and flood frequencies during the past millennium (AD 957–1956). In order to shed new light on the causal relationships between locust abundance, floods, droughts and temperature in ancient China, we used wavelet analysis to explore how the coherencies between the different variables at different frequencies have been changed during the past millennium. We find consistent in-phase coherencies between locusts and drought/flood frequencies, and out-of-phase coherencies between locusts and temperature and between drought/flood and temperature at period components of 160–170 years. Similar results are obtained when historical data of drought/flood frequencies of the Yangtze Delta region are used, despite flood data showing a weak and somewhat inconsistent association with other factors. We suggest that previously unreported periodic cooling of 160–170-year intervals dominate climatic variability in China through the past millennium, the cooling events promoting locust plagues by enhancing temperature-associated drought/flood events. Our results signify a rare example of possible benign effects of global warming on the regional risk of natural disasters such as flood/drought events and outbreaks of pest insects.

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Genetic Variation and Population Structure of Oriental Migratory Locust, Locusta migratoria manilensis, in China by Allozyme, SSRP-PCR, and AFLP Markers

Biochemical Genetics ◽

10.1007/s10528-006-9033-2 ◽

2006 ◽

Vol 44 (7-8) ◽

pp. 332-346 ◽

Cited By ~ 9

Author(s):

Xianyun Zheng ◽

Yang Zhong ◽

Yihao Duan ◽

Chunxuan Li ◽

Li Dang ◽

...

Keyword(s):

Population Structure ◽

Genetic Variation ◽

Locusta Migratoria ◽

Aflp Markers ◽

Migratory Locust ◽

Locusta Migratoria Manilensis

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Increased activity and reduced sensitivity of acetylcholinesterase associated with malathion resistance in a field population of the oriental migratory locust, Locusta migratoria manilensis (Meyen)

Pesticide Biochemistry and Physiology ◽

10.1016/j.pestbp.2007.12.004 ◽

2008 ◽

Vol 91 (1) ◽

pp. 32-38 ◽

Cited By ~ 28

Author(s):

Meiling Yang ◽

Jianzhen Zhang ◽

Kun Yan Zhu ◽

Tao Xuan ◽

Xiaojian Liu ◽

...

Keyword(s):

Locusta Migratoria ◽

Field Population ◽

Migratory Locust ◽

Locusta Migratoria Manilensis ◽

Increased Activity

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Laboratory and field trials of Green Guard® (Metarhizium anisopliae var. acridum) (Deuteromycotina: Hyphomycetes) against the oriental migratory locust (Locusta migratoria manilensis) (Orthoptera: Acrididae) in China

Journal of Orthoptera Research ◽

10.1665/1082-6467(2005)14[27:laftog]2.0.co;2 ◽

2005 ◽

Vol 14 (1) ◽

pp. 27-30 ◽

Cited By ~ 12

Author(s):

Zhang Long ◽

David M. Hunter

Keyword(s):

Metarhizium Anisopliae ◽

Locusta Migratoria ◽

Field Trials ◽

Migratory Locust ◽

Locusta Migratoria Manilensis ◽

Metarhizium Anisopliae Var Acridum

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Genomics-based approaches to screening carboxylesterase-like genes potentially involved in malathion resistance in oriental migratory locust (Locusta migratoria manilensis )

Pest Management Science ◽

10.1002/ps.2049 ◽

2010 ◽

Vol 67 (2) ◽

pp. 183-190 ◽

Cited By ~ 21

Author(s):

Jianzhen Zhang ◽

Jianqin Zhang ◽

Meiling Yang ◽

Qidong Jia ◽

Yaping Guo ◽

...

Keyword(s):

Locusta Migratoria ◽

Migratory Locust ◽

Locusta Migratoria Manilensis

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BIOLOGI DAN TRANSFORMASI BELALANG KEMBARA LOCUSTA MIGRATORIA MANILENSIS MEYEN (ORTHOPTERA: ACRIDIDAE) PADA BEBERAPA TINGKAT KEPADATAN POPULASI DI LABORATORIUM

JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA ◽

10.23960/j.hptt.1524-31 ◽

2005 ◽

Vol 5 (1) ◽

pp. 24-31

Author(s):

Hamim Sudarsono ◽

Rosma Hasibuan ◽

Damayanti Buchori

Keyword(s):

Population Density ◽

Insect Pests ◽

Control Strategies ◽

Locusta Migratoria ◽

Feeding Activity ◽

Laboratory Population ◽

Migratory Locust ◽

Green House ◽

Cage Size ◽

Locusta Migratoria Manilensis

Biology and Transformation of the Migratory Locust Locusta migratoria manilensis Meyen (Orthoptera: Acrididae) at Several Laboratory Population Density Levels. The migratory locust, Locusta migratoria manilensis Meyen (Orthoptera: Acrididae) is one of insect pests in Indonesia that undergoes a unique polymorphic biology. The locust develops a transformation phase which is triggered mainly by high population density. Its recent outbreaks in several regions of Indonesia cause major concern and control strategies must be developed to strengthen control efforts in the future. Its unique polymorphic phenomenon, therefore, must be investigated thoroughly for the basis of management of the outbreak. Due to its agility and its long range flying ability, the most realistic technique to study behavioral and morphological change of the locust is in controlled condition at a laboratory or a green house facility. The experiment was aimed to study effects of colony densities on the biology and transformation process of the migratory locust. More specifically, the experiment was to study effects of population density on the feeding activity, mortality rate, and the ratio of F/C and E/F of the migratory locust L. migratoria manilensis. The population densities were simulated in colonies at 2, 5, 10, 20, dan 30 couples per cage (cage size: 45x45x90 cm) reared in a green house. Results of the experiment show that, in general, higher densities of the migratory locust colonies tended to feed more rigorously than those of the less dense colonies. The locust remained in solitary phase at the density of 2-5 couples per cage whereas the transient phase occured at the density of 10-20 couples per cage. The colonies transformed to gregarious stage when their densities were 30 couples per cage or higher. Mortality percentage tended to be higher at colonies with higher density, especially for the third instar of the migratory locust.

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Increased risk of near term global warming due to a recent AMOC weakening

Nature Communications ◽

10.1038/s41467-021-26370-0 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Rémy Bonnet ◽

Didier Swingedouw ◽

Guillaume Gastineau ◽

Olivier Boucher ◽

Julie Deshayes ◽

...

Keyword(s):

Global Warming ◽

Low Frequency ◽

Internal Variability ◽

Atlantic Meridional Overturning Circulation ◽

Meridional Overturning Circulation ◽

The Past ◽

Increased Risk ◽

Meridional Overturning ◽

Near Term ◽

New Generation

AbstractSome of the new generation CMIP6 models are characterised by a strong temperature increase in response to increasing greenhouse gases concentration1. At first glance, these models seem less consistent with the temperature warming observed over the last decades. Here, we investigate this issue through the prism of low-frequency internal variability by comparing with observations an ensemble of 32 historical simulations performed with the IPSL-CM6A-LR model, characterized by a rather large climate sensitivity. We show that members with the smallest rates of global warming over the past 6-7 decades are also those with a large internally-driven weakening of the Atlantic Meridional Overturning Circulation (AMOC). This subset of members also matches several AMOC observational fingerprints, which are in line with such a weakening. This suggests that internal variability from the Atlantic Ocean may have dampened the magnitude of global warming over the historical era. Taking into account this AMOC weakening over the past decades means that it will be harder to avoid crossing the 2 °C warming threshold.

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