First records of aphid-pathogenic Entomophthorales in the sub-Antarctic archipelagos of Crozet and Kerguelen

Figures & data

Fig. 1  Distribution of Entomophthorales on Île de la Possession (Archipel Crozet).

Fig. 2  Distribution of Entomophthorales in Archipel des Kerguelen (Golfe du Morbihan).

Table 1 The Entomophthorales and their aphid hosts. Numbers correspond to the number of collected aphids: in boldface 2001–02; in roman: 2011–13).

	Île de la Possession			Archipel des Kerguelen
Entomophthorales	Myzus ascalonicus	Aulacorthum solani	Rhopalosiphum padi	Myzus ascalonicus	Macrosiphum euphorbiae	Rhopalosiphum padi
Conidiobolus coronatus	1
Conidiobolus obscurus	27+22	7	1	5		1
Entomophthora planchoniana	3			38	2
Pandora neoaphidis			2
Zoophthora phalloides	1		3
Zoophthora sp.	1
Total	55	7	6	43	2	1

Table 2 The six entomophthoralean species found on aphids in Crozet and Kerguelen archipelagos: main morphological characteristics and corresponding spore sizes of the local collected material.

Entomophthoralean species	Main morphological characteristics	Primary conidia Extreme length×extreme width in µm	Secondary conidia Length×width in µm	Resting spores in µm
Conidiobolus obscurus	Unbranched conidiophores, absence of rhizoids, almost globose primary conidia, spherical resting spores	32.7–45.7×32.3–40.7 mean: 40.1×34.5	–	Diameter: 34.1–34.7 Wall thickness: 2.4–3.3
Entomophthora planchoniana	Unbranched conidiophores, thick rhizoids, subspherical campanulate conidia, resting spores with dark, uneven epispore	16.7–19.0×15.1–16.2 mean: 18.3×14.7	–	No resting spores observed
Pandora neoaphidis	Branched conidiophores, thin rhizoids with discoid holdfast, primary conidia ovoid to elongate ovoid, absence of resting spores	21.1–25.0×12.6–14.9	–	–
Zoophthora phalloides	Branched conidiophores, thin rhizoids with specialized holdfast, long and slim primary conidia, with a papilla demarcated with a light bulge from the conidial body, capilliconidia	33.4–35.1×8.7–8.9	31.9×8.7	No resting spores observed
Zoophthora sp.	Id. but ellipsoid primary conidia	22.8×10.8	23.1×7.5	No resting spores observed
Conidiobolus coronatus	Unbranched conidiophores, absence of rhizoïds, almost globose primary conidia, absence of resting spores, presence of villose conidia	41.2×36.1		–