Preference of adult Asian citrus psyllid, Diaphorina citri (Homoptera: Psyllidae) for Murraya paniculata and Citrus unshiu
Preference of adult Asian citrus psyllid, Diaphorina citri (Homoptera: Psyllidae) for Murraya paniculata and Citrus unshiu
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DOI：
10.1303/jjaez.2008.27
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发表时间：
2008-01-01
影响因子：
0.5
通讯作者：
Ashihara, Wataru
中科院分区：
文献类型：
--
作者：
Ikeda, Kousuke;Ashihara, Wataru
在亚洲柑桔木虱的北部分布区，柑桔林内木虱的种群密度远低于树篱上。为了解释这种不同的现象，我们调查了柑桔成虫对桔梗和桔梗的偏好。将柑桔成虫释放到装有盆栽的棚内，直到释放后第4天，两种植株上的成虫数量都有所增加。此后，每一种植物的平均密度在新成虫羽化开始前的18天内保持相对稳定。12月下旬前，大多数松树都能产生新枝，成虫密度随新枝增加而增加，在密度高峰后1 ~ 2个月下降。在两棵树上只产生一次可供柑桔繁殖的新枝，新枝生长后成虫密度丰富，直到12月下旬成虫密度逐渐下降。在其他4棵青杉树上，成虫由其他树迁移而来，密度保持相对稳定。将柑桔成虫引入含有青霉和秋霉芽叶的偏好试验室内，成虫聚集在芽上的数量明显高于两种植物叶片上的数量。在芽和叶上均无明显的偏好。结果表明，柑桔在北方分布区域的种群数量差异并不是由于柑桔对柑桔的偏好，而可能是由于柑桔在台风季节和冬季不断产生新芽和密集种植柑桔树篱，有利于柑桔的繁殖和生存。
In the northern distribution areas of the Asian citrus psyllid, Diaphorina citri in Japan, psyllid population densities in citrus groves were much lower than on Murraya paniculata hedges. We investigated the preference of D. citri adults for M. paniculata and Citrus unshiu to interpret such different occurrences. When D. citri adults were released into a screen house containing potted M. paniculata and C. unshiu, the number of adults on both plants increased until the 4th day after release. Thereafter, the mean densities remained relatively constant for 18 days on each plant species before the start of new adult emergence. On most M. paniculata trees, new shoots were always produced by late December, and adult densities increased after the increase of new shoots and declined one or two months after the peak density. New shoots of C. unshiu available for D. citri reproduction were produced only once on two trees, on which adult densities become abundant after the growth of new shoots and decreased gradually until late December. On the other four C. unshiu trees, adults migrated from other trees and their densities remained relatively constant. When D. citri adults were introduced into a preference test chamber containing buds and leaves of C. unshiu and M. paniculata, the adults were significantly more aggregated on the buds than on the leaves of both plants. No preference between C. unshiu and M. paniculata for either buds or leaves was detected. The present experimental results suggested that the difference in the population levels of D. citri on C. unshiu and M. paniculata in their northern distribution areas was not caused by the preference of the insect, but may be due to continuous production of new shoots and dense planting of M. paniculata hedges favoring the reproduction and survival of D. citri during the typhoon season and winter.