Trichogramma evanescens

Trichogramma evanescens is a 0.5mm long[1] parasitoid wasp which parasites Lepidoptera eggs.

Trichogramma evanescens
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Trichogrammatidae
Genus: Trichogramma
Species:
T. evanescens
Binomial name
Trichogramma evanescens
Westwood, 1833

Use for biocontrol

In the Philippines this parasitoid has been used to eradicate the Asian Corn Borer, a pest of maize in East Asia. Some companies sell this insect in the pupal stage to be deposited in fields that have Lepidoptera pests.[2]

In 2021 the National Trust in England embarked on a trial of using T. evanescens, which parasitises clothes moth eggs, in conjunction with pheromones to control common clothes moths, which cause serious damage to carpets, furniture, clothing and other wool and silk objects in historic buildings.[3] The trial was abandoned in 2023; while the microwasps performed well at reducing moth populations in combination with pheromones, they were no better than pheromones alone.[4]

References
  1. "Blickling Hall: Wasps deployed to protect mansion from moths". BBC News. 17 February 2021.
  2. De Liñán, Carlos (2010). Vademecum de productos fitosanitarios y nutricionales (in Spanish). pp. 146–147.
  3. "Conservation at Blickling Hall, Norfolk". National Trust. 2022.
  4. "'Surprising' clothes moths slump of nearly 40% across National Trust houses, possibly helped by record heat and drought, charity's annual insect pests report finds" (Press release). National Trust. 13 February 2023.


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