This work was supported by the National Natural Science Foundation of China (U20A20118) and the Open Fund of the Hunan Engineering Research Center of the Ecological Environment Institute Monitoring and Disaster Prevention and Mitigation Technology in Dongting Lake (2023-DTH-04).

All animal experiments were approved by the Ethics Committee of the Institute of Subtropical Agriculture, Chinese Academy of Sciences.
1. Construction of rodent-proof wall
<ol>
	<li>Construction of wave-retaining wall
	<ol>
		<li>Build the wave-retaining wall 0.5 m higher than the embankment surface. Smooth the wall surface on the side of the lake with cement, and add a flat plate slightly wider than the wall to the top such that it extends 8 cm, similar to a tongue (<strong...

Reducing Rodent Infestations in Agriculture with Rodent-Proof Constructions

<ol>
	<li>Hinds, L. A., Belmain, S. R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Fertility+control+of+rodent+pests:+recent+developments+from+lab+to+field.">Fertility control of rodent pests: recent developments from lab to field.</a> Integr Zool. 17 (6), 960-963 (2022).</li><li>John, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Rodent+outbreaks+and+rice+pre-harvest+losses+in+Southeast+Asia.">Rodent outbreaks and rice pre-harvest losses in Southeast Asia.</a> Food Sec. 6 (2), 249-260 (2014).</li><li>Tomass, Z., Shibru, S., Yonas, M., Leirs, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Farmers'+perspectives+of+rodent+damage+and+rodent+management+in+smallholder+maize+cropping+systems+of+Southern+Ethiopia.">Farmers' perspectives of rodent damage and rodent management in smallholder maize cropping systems of Southern Ethiopia.</a> Crop Prot. 136, 105232 (2020).</li><li>Imholt, C., Reil, D., Plasil, P., Rodiger, K., Jacob, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Long-term+population+patterns+of+rodents+and+associated+damage+in+German+forestry.">Long-term population patterns of rodents and associated damage in German forestry.</a> Pest Manag Sci. 73 (2), 332-340 (2017).</li><li>Liu, Y., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Effects+of+nitrogen+addition+and+mowing+on+rodent+damage+in+an+Inner+Mongolian+steppe.">Effects of nitrogen addition and mowing on rodent damage in an Inner Mongolian steppe.</a> Ecol Evol. 8 (8), 3919-3926 (2018).</li><li>Meerburg, B. G., Singleton, G. R., Kijlstra, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Rodent-borne+diseases+and+their+risks+for+public+health.">Rodent-borne diseases and their risks for public health.</a> Crit Rev Microbiol. 35 (3), 221-270 (2009).</li><li>Wang, W. F., Yuan, W. K., Chen, Y. L., Wang, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Microplastics+in+surface+waters+of+Dongting+Lake+and+Hong,+China.">Microplastics in surface waters of Dongting Lake and Hong, China.</a> Sic Total Environ. 633, 539-545 (2018).</li><li>Zhu, L. L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Effects+of+hydrological+environment+on+litter+carbon+input+into+the+surface+soil+organic+carbon+pool+in+the+Dongting+Lake+floodplain.">Effects of hydrological environment on litter carbon input into the surface soil organic carbon pool in the Dongting Lake floodplain.</a> Catena. 208, 105761 (2022).</li><li>Zhang, M. W., Li, B., Wang, Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Analysis+on+causes+of+population+outbreak+of+Microtus+fortis+in+Dongting+Lake+region+in+2007.">Analysis on causes of population outbreak of Microtus fortis in Dongting Lake region in 2007.</a> Research of Agricultural Modernization. 28 (5), 601-605 (2007).</li><li>Feng, L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Distribution+pattern+and+diversity+of+rodent+communities+at+beach+and+lakeside+areas+in+the+Dongting+Lake+region.">Distribution pattern and diversity of rodent communities at beach and lakeside areas in the Dongting Lake region.</a> Acta Ecol Sin. 37 (17), 5771-5779 (2017).</li><li>Wang, Y., Guo, C., Zhang, M. W., LI, B., Chen, A. G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Population+dynamics+of+Microtus+fortis+in+Dongting+Lake+region+and+its+forecasting.">Population dynamics of Microtus fortis in Dongting Lake region and its forecasting.</a> Chinese Journal of Applied Ecology. 15 (2), 308-312 (2004).</li><li>Chen, A. G., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Study+on+the+population+characteristics+and+disaster+causes+of+Microtus+fortis+in+the+Dongting+Lake+area.">Study on the population characteristics and disaster causes of Microtus fortis in the Dongting Lake area.</a> Research on the Biology of Chinese Veterinary Animals. , 31-38 (1995).</li><li>Chen, A. G., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Important+ecology+and+its+control+in+the+rice-growing+area+of+the+Yangtze+River+Basin+Countermeasures.">Important ecology and its control in the rice-growing area of the Yangtze River Basin Countermeasures.</a> Ecology of Agriculturally Important Rodents and Control Countermeasures. , 114-174 (1998).</li><li>Zhang, M. W., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+survey+on+effect+of+the+rodent-proof+wall+for+controlling+Microtus+fortis+in+Dongting+Lake+area.">A survey on effect of the rodent-proof wall for controlling Microtus fortis in Dongting Lake area.</a> Plant Protection. 39 (3), 167-172 (2013).</li><li>Wang, Y., Guo, C., Li, B., Wu, Z. J., Chen, A. G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+study+on+the+multiple+control+criteria+of+pest+rodents+in+Dongting+Lake+rice+areas.">A study on the multiple control criteria of pest rodents in Dongting Lake rice areas.</a> Research of Agriculture Modernization. 18 (3), 58-60 (1997).</li><li>Wang, C. X., Pan, Z. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Introduction+to+rodent+killing.">Introduction to rodent killing.</a> People's Health Publishing House. , 277-288 (1983).</li><li>Wang, Z., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Comparison+and+analysis+of+three+investigation+methods+applied+for+rodent+density+monitoring+at+grasslands.">Comparison and analysis of three investigation methods applied for rodent density monitoring at grasslands.</a> Chinese Journal of Hygienic Insecticides &amp; Equipments. 25 (3), 238-240 (2019).</li><li>Khan, A. A., Munir, S., Hussain, I. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Evaluation+of+in-burrow+baiting+technique+for+control+of+rodents+in+groundnut+crop.">Evaluation of in-burrow baiting technique for control of rodents in groundnut crop.</a> Pak J Zool. 44 (4), 1035-1039 (2012).</li></ol>

There are several critical steps in the protocol. The width of the tongue-shaped flat plate of the rodent-proof wall should be sufficiently wide, and the height of the wall should be set such that rodents in the area cannot cross it. When wave-retaining walls have gaps leading to the beach, the depth of the rodent-proof trench should be set to a depth that rodents cannot climb, and the width of the ditch should be set to a distance that rodents cannot cross. The height of the baffle plate and pots in the buried-pot barri...

Rodent damage is an important biological disaster that causes extensive damage to all aspects of human production and life1,2. In agriculture, rodent infestation of farmland damages crops3; in forestry, rodents eat tree seedlings, roots, bark, and plant seeds, leading to delayed forest regeneration and tree death, which in turn affects forest greening and sand fixation4; and in grasslands, rodents eat roots and seeds, leading to degradation of grassland vegetation and increased sanding, which affects the development of the grassland livestock industry5. In addition, rodents are hosts for many viruses, bacteria, and parasites that can seriously endanger human health6.
Dongting Lake, located in the northeastern region of Hunan Province, is an important water storage and flood-regulating lake in China7. It has many ecological functions, such as flood regulation and detention, biodiversity protection, and water resource supply8,9. In recent decades, there have been many rodent outbreaks in the Dongting Lake area, especially an outbreak of the reed vole Microtus fortis in 2007, which caused enormous economic losses10. During the dry season, M. fortis grows and breeds on the lake beach in the Dongting Lake area. As the water level in Dongting Lake rises during the summer flood season, the habitat of M. fortis shrinks, forcing it to migrate into the embankment by swimming, crossing the flood control embankment, and reaching nearby farmlands, causing great harm to agricultural production11,12. Chen et al. proposed a control measure for building a rodent-proof wall to block the migration pathway of M. fortis, based on the wave-retaining wall method jointly created by Jinpen Farm and Nanda Town in Yuanjiang City, both of which are located in Yiyang City, Hunan Province13,14. In dikes without rodent-proof walls, large numbers of M. fortis can cause devastating damage to crops during and after migration. Dikes without rodent-proof walls are typically manually trapped and drugged to exterminate rodents during and after they enter the farmland. In the case of dikes with rodent-proof walls, many rodents remain outside the dikes during M. fortis outbreaks. Thus, many trapping and elimination operations are carried out outside dikes; generally, farmlands do not need to implement chemical drugs or artificial trapping. This approach can significantly reduce the density of vermin without causing serious harm to farmland crops. Conventional rodent drug prevention methods cannot achieve the expected effects, and there are hidden dangers associated with environmental pollution and human and animal safety15. Considering the characteristics that allow rodents to easily break out and cause disaster, the following protocol introduces three physical rodent control methods, including a permanent rodent-proof wall and two kinds of temporary walls, and presents four statistical methods to measure rodent control effect, providing a scientific basis for rodent control. Instead of the traditional poisonous bait, the rodent-proof wall effectively protects the environment and safeguards the health of humans and animals; thus, it is a more effective and environmentally friendly control method that should be advocated and vigorously promoted.

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>Snap traps</td>
			<td>Guixi Mousing Tool Factory, Jiangxi, China</td>
			<td>large-sized</td>
			<td>150 mm &#215; 80 mm</td>
		</tr>
		<tr>
			<td>SPSS</td>
			<td>IBM</td>
			<td>version 16.0&#160;</td>
			<td></td>
		</tr>
	</tbody>
</table>

rodent-proof wall: an efficient physical method for controlling rodents and its efficiency statistics

Rodent damage poses a significant threat to crops, human life, and health. Compared to chemical rodent control, such as placing poisonous baits, it is more economical and environmentally friendly to use physical methods, such as building a rodent-proof wall. This study introduces a method of physically controlling harmful rodents and four methods of calculating the effect of rodents control. To understand the controlling effect of the rodent-proof wall, an investigation was conducted on the Dongting Lake beach and corresponding farmland in the embankment in April and July 2012. Our findings illustrated that the density of the reed vole Microtus fortis in the farmland with rodent-proof walls was 0.52%, significantly lower than that in the farmland without rodent-proof walls (1.76%) after artificial trapping and drug extermination (&#967;2 = 3.900, P = 0.048). The density of M. fortis that had migrated into the farmland in dikes with a rodent-proof wall decreased by 98.53%, significantly higher than the decrease of density in dikes without a rodent-proof wall (86.61%) (&#967;2 = 11.060, P = 0.01). The results demonstrated the effectiveness of rodent-proof wall control. Therefore, building a rodent-proof wall should be advocated and vigorously promoted to prevent the migration of rodents into the Dongting Lake area and similar environments, as they cause harm.

Author Spotlight: Impact of Physical Barriers on Rodent Populations in Farmland Areas

Rodent-Proof Wall: An Efficient Physical Method for Controlling Rodents and its Efficiency Statistics

Rodent damage poses a significant threat to crops, human life, and the earth. Our study introduced one physical method, the rodent-proof wall, which is suitable to prevent rodents with migratory habits, such as Microtus fortis, in Dongting Lake area. They were migrates from the lake beach to farmland and that causes harm.Rodents are beneficial towards the ecosystem inside the lake beach, but they are harmful when they migrate towards the farmland. It is hard to find a way to control rodents in a central area without causing harm to other areas. The rodent-proof wall might be a good idea in Dongting Lake area.Building a rodent-proof wall can provide long-term protection. This means keeps the rodents contained with a certain area instead of killing them directly. This is friendly to the ecosystem and environment.In Dongting Lake area, the rodent-proof wall was transformed from the original wave-retaining wall, so the cost was low.

To determine the control effect of the rodent-proof wall, surveys were conducted before and after the water rose in April and July 2012, respectively, on the lake beach and corresponding diked farmland15. The survey sites were located in the Dongting Lake area of Hunan Province, namely, the lake beach outside Matangyuan in Yueyang County (29&#176;14.5&#8242; N; 113&#176;03.2&#8242; E), Beizhouzi Town in Datong Lake District (29&#176;10.1&#8242; N; 112&#176;47.7&#8242; E), Shuangfeng Dike in Nanda ...

Watch this Scientific Journal Video about Author Spotlight: Impact of Physical Barriers on Rodent Populations in Farmland Areas at JoVE.com

Here, we introduce three methods for the physical control of pest rodents, four methods for counting their effectiveness against rodents, and the statistics of the effect of building a rodent-proof wall.

Rodent damage poses a significant threat to crops, human life, and health. Compared to chemical rodent control, such as placing poisonous baits, it is ...

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Biology

Construction and Efficacy Assessment of Rodent-Proof Walls in Agricultural Lands

412 Views.  Chinese Academy of Sciences.  Here, we introduce three methods for the physical control of pest rodents, four methods for counting their effectiveness against rodents, and the statistics of the effect of building a rodent-proof wall.

Reducing Rodent Infestations in Agriculture with Rodent-Proof Constructions

Summary