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- Title
柑橘銹蟎[Phyllocoptruta oleivora (Ashmead)]在三種柑橘上之族群動態與空間分布.
- Authors
陳柏宏; 王泰權; 陳祈男; 黃瓊慧; 黃守宏
- Abstract
The citrus rust mite, Phyllocoptruta oleivora (Ashmead), is a major pest of citrus plants in Taiwan. Citrus rust mites feed on leaves and fruit surfaces, significantly affecting the quality of citrus products. The present study investigated the field population dynamics and spatial distribution of citrus rust mites on 'Eureka' lemons, 'Persian' limes, and 'Murcott' tangors from January to December in 2016. Study results regarding the three varieties of citrus plants showed that citrus rust mite populations reached the highest density during fruit growing periods. Fruits suffered the highest density of mite infestations and followed by mature leaves, and young leaves suffered the least damage. The number of citrus rust mites on the lower surface of leaves were higher than that on the upper surface of leaves. The direction of fruits growing on citrus plants did not significantly affect the number of citrus rust mites population. Rainfall and precipitation frequency may be one of the key factors causing low density of mites from May to October. Three indices (index of dispersion, Lloyd's index of mean crowding and Lloyd's index of patchiness) used to identify the spatial distribution pattern of citrus rust mites all indicated contagious patterns of spatial distribution except when mite density was very low, the distribution patterns became regular or random.
- Subjects
CITRUS rust mite; CLASSIFICATION of insects; CITRUS varieties; INSECT populations; GEOGRAPHICAL distribution of insects
- Publication
Journal of Taiwan Agricultural Research, 2018, Vol 67, Issue 2, p166
- ISSN
2790-086X
- Publication type
Article
- DOI
10.6156/JTAR.201806_67(2).0003