Ephedrini

Genus Guides

Ephedrini is a tribe of koinobiont within the Aphidiinae (Braconidae). The tribe comprises approximately 29 in India, including such as Ephedrus and Toxares. Members are exclusively endoparasitoids of aphids, with some species exhibiting extreme polyphagy—Toxares deltiger parasitizes 27 aphid species and Ephedrus plagiator parasitizes 22. Several species have been successfully employed in programs worldwide.

Pronunciation

How to pronounce Ephedrini: /ˌɛfəˈdraɪnaɪ/

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Distribution

In India, Ephedrini are distributed across 11 states and union territories, ranging from northeast India (Arunachal Pradesh, Manipur, Meghalaya, Mizoram, Nagaland, Sikkim, West Bengal) to northwest India (Himachal Pradesh, Jammu & Kashmir, Uttarakhand). Meghalaya nearly two-thirds of Indian Ephedrini species. The tribe has a global distribution with species used in worldwide.

Host Associations

Myzus persicae - primary Most important for Ephedrini in India; parasitized by multiple
Aphis gossypii - Parasitized by 8 Ephedrini
Uroleucon sonchi - Parasitized by 8 Ephedrini

Life Cycle

Exclusively koinobiont endoparasitoids of aphids. Larvae develop within living aphids, allowing the host to continue feeding and growing until the is ready to emerge.

Behavior

Highly documented in key . Toxares deltiger exhibits 285 tritrophic associations across 27 species and 28 plants. Ephedrus plagiator exhibits 110 tritrophic associations across 22 aphid species and 52 host plants.

Ecological Role

agents of . Some have been successfully used in augmentative and programs against aphid pests worldwide.

Human Relevance

Used in of agricultural and horticultural pests. The nature of such as Toxares deltiger and Ephedrus plagiator makes them valuable for managing multiple aphid species in crop systems.

Similar Taxa

PrainiAlso a tribe of koinobiont in Aphidiinae; distinguished by containing only the Praon in India (16 vs. 29 in Ephedrini), with 5 species and generally narrower ranges except for Praon volucre

More Details

Indian species diversity

29 documented in India, parasitizing 94 species. Tritrophic association data indicates complex interactions: Toxares deltiger (285 associations), Ephedrus plagiator (110 associations).

Geographic concentration

concentrated in Meghalaya (two-thirds of Indian ) and distributed across Himalayan and northeastern states, suggesting affinity for temperate to subtropical montane regions.