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Abstract

Study on factors influencing the selection of the height of plant inhabited by Locusta migratoria manilensis.

Abstract

To clarify the space utilization characteristics of Locusta migratoria manilensis to plant communities, the plant height selection behavior was observed in natural habitats through cage tests at Kenli District, Dongying City. The differences of plant height selection of L. m. manilensis with different generation, population density, survey time, and the relationships between plant height selection of locusts and temperature and humidity factors were determined. The results showed that the preference of the L. m. manilensis was 0 - 20 cm in summer generation and above 80 cm in autumn generation. When population density was not higher than d =20 head/m2 with sufficient food sources, the nymphs preferred to select the middle to upper part of the plant, and the select proportion of nymphs was the largest at above 80 cm generally. When population density was d =100 head/m2 with sufficient food sources, the nymphs preferred to select the lower part of the plant, and the select proportion of nymphs was the largest at 0 -20 cm generally. The nymphs preferred to select the lower part of the plant before sunrise and after sunset. At 12 00 and 16 00 investigation period, the nymphs tended to the middle to the lower part of the plant. The nymphs at 0-20, 40 60 and above 80 cm was negatively correlated with environmental temperature, but significantly positively correlated with environmental humidity (P <0.05). This indicates that locusts prefer to select these three locations with the decrease of temperature or the increase of humidity.

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Abstract details

  • Author Affiliation
  • MARA-CABI Joint Laboratory, for Rio-safety, Institute of Plant Protection, Chinese Academy of Agricultural Science, Beijing 100193, China.
  • ISSN
  • 1674-0858
  • Publisher information
  • Guangdong Provincial Association for Science & Technology Guangzhou China
  • Language of Summary
  • English
  • Record Number
  • 20219832540