刺桐釉小蜂(Quadrastichus erythrinae)為近年來寄生於刺桐屬（Erythrina）植物的一種膜翅目釉小蜂科昆蟲，其生活史短且具世代重疊的特性，目前已蔓延至全臺灣並造成嚴重危害。本研究針對刺桐（Erythrina variegata）上的刺桐釉小蜂雌蟲與雄蟲蟲癭，以觀察石蠟切片的方式比較其組織結構分層，結果發現刺桐釉小蜂兩性蟲癭在外觀與組織結構並無差異。在葉部分布實驗中，結果顯示，無論在三片小葉中，或者中肋、側脈、脈間中，雄蟲蟲癭數遠比雌蟲蟲癭數多，並且雄蟲在頂小葉的數量最多，雌蟲則無顯著差異。刺桐釉小蜂一般會選擇葉部較幼嫩的地方造癭，切片發現刺桐葉部發育初期，其葉肉組織的排列較稀疏，因此容易被刺桐釉小蜂入侵；蟲癭成長期的內層薄壁細胞分化為營養細胞，而癭室在成熟期達到最大，在開裂期後的蟲癭，伴隨著成蟲羽化後又變小。除了單生蟲癭外，在受危害較嚴重的刺桐植株上常可發現聚生蟲癭，其癭體與腔室大小均比單生蟲癭大，並且一個蟲癭約有2 ~ 27 個腔室，其中雄蟲數量也比雌蟲數量多。除此之外，多數刺桐的花序也遭受刺桐釉小蜂的入侵，觀察其花部的縱切發現，目前刺桐釉小蜂仍只寄生於花萼中，其因可能為花萼於薄壁組織厚，花苞時期完全包覆其他花部，具保護花部功能，且花部造癭對刺桐的影響有待更深入的探討。

Erythrina variegata is a deciduous tree which belongs to the family of Fabaceae. Recently, Erythrina variegate had been severely infected by gall wasp Quadrastichus erythrinae in Taiwan. The parasitism led to the swelling galls and eventually the death of infected plants. The prevention of Quadrastichus erythrinae infection is therefore very important. Here I used paraffin section technique to study the microstructure of the Erythrina galls. The results show Quadrastichus erythrinae gall sexes didn’t differ in appearance and organizational structure. Whether the three leaflets, or rib, lateral veins, the number of male are larger than female, and the most number of male are in the top of the leaflets, but there is no significant difference in female. The Erythrina arrangement leaves in early development, its mesophyll tissue are sparse, therefore, the Erythrina can easily be invaded by wasps. In addition to single gall, many gregarious galls are also found at the plants. Gregarious galls body and the chamber size are large than single galls. Most Erythrina inflorescence also suffered wasp invasion. Observation found that the flower longitudinal section, wasps are still only in the calyx, which may be due to the parenchyma calyx thick buds completely coated during other floral, which have protection function, and floral gall needs to be more in-depth discussion.

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