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The Effect of Landscape Composition on the Abundance of Laodelphax striatellus Fallén in Fragmented Agricultural Landscapes

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  • Zhanyu Liu

    (Institute of Remote Sensing and Earth Science, Hangzhou Normal University, Hangzhou 311121, China
    State Key Laboratory of Rice Biology/Institute of Insect Sciences, Zhejiang University, Hangzhou 310058, China
    Center for Global Change and Earth Observation, Michigan State University, East Lansing, MI 48823, USA)

  • Jiquan Chen

    (Center for Global Change and Earth Observation, Michigan State University, East Lansing, MI 48823, USA)

  • Jiaguo Qi

    (Center for Global Change and Earth Observation, Michigan State University, East Lansing, MI 48823, USA)

  • Ranjeet John

    (Center for Global Change and Earth Observation, Michigan State University, East Lansing, MI 48823, USA)

  • Jiaan Cheng

    (State Key Laboratory of Rice Biology/Institute of Insect Sciences, Zhejiang University, Hangzhou 310058, China)

  • Zengrong Zhu

    (State Key Laboratory of Rice Biology/Institute of Insect Sciences, Zhejiang University, Hangzhou 310058, China)

Abstract

The spatial distribution of crop and non-crop habitats over segmented agricultural landscapes could be used as a means to reduce insect pest populations. Seven land cover categories such as wheat, rapeseed, vegetable, water, built-up, paved road, and unsurfaced road were extracted from GeoEye satellite images dating from late May to late June of 2010. Three diversity metrics and three evenness metrics were estimated from the abovementioned land cover categories for quantifying the effect of landscape composition on nymphal and adult Laodelphax striatellus Fallén. The degree of correlation between the proportion of crop cover and adjacent spatial scales ( r : 0.651–0.983) was higher than the correlation between the proportion of crop cover and nonadjacent spatial scales ( r : −0.255–0.896). While the degree of correlation between diversity indices and abundance of L. striatellus decreased gradually when the spatial scales varied from large (>100 m radius buffer) to small (<100 m). Our study suggests that when using natural biological pest control and ecological engineering practices in the rural-urban fringes, the crop field’s width should be less than 200 m and increasing vegetation diversity within such a scale will be helpful to regulate the insect pests under a certain density.

Suggested Citation

  • Zhanyu Liu & Jiquan Chen & Jiaguo Qi & Ranjeet John & Jiaan Cheng & Zengrong Zhu, 2016. "The Effect of Landscape Composition on the Abundance of Laodelphax striatellus Fallén in Fragmented Agricultural Landscapes," Land, MDPI, vol. 5(4), pages 1-13, October.
    • Handle: RePEc:gam:jlands:v:5:y:2016:i:4:p:36-:d:81617
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    References listed on IDEAS

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    1. Heong, K.L. & Hardy, B. (ed.), 2009. "Planthopphers: new threats to the sustainability of intensive rice production systems in Asia," IRRI Books, International Rice Research Institute (IRRI), number 164471.
    2. Heong, K.L. & Hardy, B., 2009. "Planthoppers: New Threats to the Sustainability of Intensive Rice Production Systems in Asia," IRRI Books, International Rice Research Institute (IRRI), number 281811.
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