摘要
对柽柳的重要食叶昆虫———柽柳粗角萤叶甲的交配和产卵行为及其相互关系、产卵方式与被寄生的相关性等生殖行为进行了研究。该叶甲行多次交配和多次产卵,一次完整的交配过程包括交配前、交配中和交配后3阶段,对各阶段内不同的行为特征进行了描述。雌虫交配后28h开始产卵;室内条件下卵为聚产,每卵块平均7粒,但野外则多为散产(占57.7%);产卵历期11.4d,每雌产卵141粒。成虫羽化后14d累计卵量为总卵量的50%,28d达80%以上。柽柳粗角萤叶甲雌虫交配1次仅产卵7.5±2.8粒,产卵持续1.9±0.8d;而多次交配雌虫的产卵量为141.0±88.1粒,产卵历期11.4±5.9d。柽柳粗角萤叶甲的交配活动在上午和下午各有一高峰,产卵活动在中午和晚上各有一高峰。柄翅卵小蜂对第2代卵的寄生率(23.6%)高于第3代(5.96%),柽柳粗角萤叶甲二代卵块大小与被寄生率呈明显负相关。
Diorhabda deserticola Chen is an important biocontrol agent for management of the invasive alien saltcedar in the United States. The mating and oviposition behaviors, including the relationships between mating frequency and fecundity, and between oviposition style and parasitized eggs, of the leaf beetle were evaluated. Multiple mating and oviposition occurred during the life-time of the female. A mating behavior always consisted of three successive stages, pre-copulation, copulation and post-copulation, and the different behavior performances at each stage were described. Females started to lay eggs in 28 h after mating. Eggs were laid in masses each containing an average of seven eggs in the laboratory, but more than half of the eggs （57.7%） was singly laid in the field. Oviposition lasted 11.4 ± 5.2 d and 141.0 ± 88.1 eggs were laid per female during this period. More than half of eggs were laid in 14 d and over 80% eggs were laid in 28 d after adult eclosion. The numbers of parasitized eggs were negatively correlated with the sizes of egg masses. Mating activity peaked in the early morning and early afternoon and oviposition peaked at noon and in the evening. The percentage of parasitized eggs （Mymaridae） during the 2nd generation was 23.6%, higher than that during the 3rd generation （5.96%）. Multiple mated females laid an average of 141.0 ± 88.1 eggs and the oviposition period lasted 11.4 ± 5.9 d, which were nearly 19 and 6 times more/longer than those of females mated once （7.5 ± 2.8 eggs and 1.9 ± 0.8 d, respectively） .
出处
《中国生物防治》
CSCD
北大核心
2006年第2期109-113,共5页
Chinese Journal of Biological Control
基金
美国农业部科技局(ARS/USDA)国际合作项目(58-6206-7-F069)
关键词
粗角萤叶甲
柽柳
生殖行为
生物防治
入侵生物
Diorhabda deserticola
Tamarix
reproductive behavior
biocontrol
biological invasion
