Relative preference of Thrips hawaiiensis for different banana tissues
Author of the article:FENG Chen-Cheng1** LI Xun-Dong2 XU Sheng-Tao2 MAO Jia2 XIA Ti-Yuan1 LING Hui3 LIU Li-Na2 YIN
Author's Workplace:1. School of Agronomy and Life Sciences, Kunming University, Kunming 650205, China; 2. Institute of Agricultural Environment and Resource, Yunnan Academy of Agricultural Sciences, Kunming 650205, China; 3. Hekou County Service Center of Special Industrial Development, Honghe 661399, China
Key Words:Thrips hawaiiensis; banana buds; harmful symptom; selected preference
Abstract:
[Aim] To investigate the
relative preference of Thrips hawaiiensis for different banana tissues, the symptoms of crop damage caused by this
pest, and its distribution on banana plants. [Methods] Symptoms of T. hawaiiensis damage to different plant tissues were surveyed and
the relative preference of T. hawaiiensis for different banana bud tissues were tested using a Y-tube olfactometer in a
laboratory. [Results] The bracts, fruit axis, stamen and
pistils, and young fruits of banana plants can all be damaged by T. hawaiiensis. The main damage symptom
are raised black spots on the epidermal surface. The average number of black
buds was 2 361.2 on young fruits, 537.7 on the pistil and stamens and 97.7 on
the axil. The number of black spots on the dorsal surface of fruits was significantly
higher than on the ventral or lateral surfaces (P<0.05). Compared to the control, the relative preference of T. hawaiiensis for young fruits, stamen
and pistils, bracts, pseudostems, leaves and the fruit axis was, respectively
83.3 %, 73.3 %, 73.3 %, 45.0 %, 38.3 % and 40.0 %. A significant preference for
young fruits was apparent (P<0.001). There was no significant
preference for young fruits over bracts (P>0.05), but both were
preferred over stamen and pistils. [Conclusion]
T.
hawaiiensis can damage different tissues of banana buds, including young
fruits, stamen and pistils, bracts and the fruit axis. Young banana fruits are
significantly more attractive to T.
hawaiiensis than other tissues.
These results provide a reference for identifying T. hawaiiensis damage on banana plants, and the comprehensive
prevention and control of this pest.