Sensilla on the antennae, legs and ovipositor of Spathius agrili Yang (Hymenoptera: Braconidae), a parasitoid of the emerald ash borer Agrilus planipennis Fairmaire (Coleoptera: Buprestidae)

Microscopy Research and Technique
Xiaoyi WangJuli Gould

Abstract

To investigate the host-finding mechanisms of Spathius agrili Yang, a parasitoid of the emerald ash borer, Agrilus planipennis Fairmaire, a highly concealed insect pest of Fraxinus spp. The morphology and ultrastructure of sensilla on the antennae and legs of both sexes and on the ovipositors and ovipositor sheaths of females were observed using SEM. Results showed that abundant sensilla trichodea (ST) are distributed on the antennae of both females and males, with the sharp trichoid with a socket at the base being the most numerous sensillum. There are 6-7 sensilla placodea on each segment of the flagellum, arranged lengthways in parallel rows. There are very few sensilla styloconica on the female antennae. The tibiae have mostly sensilla chaetica, whereas three types of ST and the relatively plentiful sensilla chaetica are present on the tarsi. Besides ST, a mass of sensilla squamiformia and small short spines are distributed on the pulvilli. Basically there are no sensilla on the female ovipositor, only steering mechanisms for drilling bark and a variety of v-shaped grooves. However, a large numbers of short sensilla chaetica and microtrichia are found on the internal surface of ovipositor sheath. The outer surface of the ov...Continue Reading

References

Jan 22, 2002·Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology·S FischerS Dorn
Jun 2, 2004·Microscopy Research and Technique·Maartje A K BleekerLouise E M Vet
Jul 15, 2004·Microscopy Research and Technique·Jayne E Yack
Apr 1, 2006·Malaria Journal·R Jason Pitts, Laurence J Zwiebel

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Citations

Feb 26, 2019·Microscopy Research and Technique·Gwang Hyun RohChung Gyoo Park

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