Triops - an alternative to DDT for mosquito control

Triops, also called tadpole shrimp, often live in rice paddies. Besides rice seedlings and weeds, they also enjoy eating mosquito larvae. 

about Triops and rice cultivation

https://www.youtube.com/watch?v=T2xnXaX7r3g

It would be interesting to introduce such varieties to malaria hotspots. However, the disastrous results of introducing the cane toad to Australia must be considered.

From Wikipedia:

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T. longicaudatus is considered a human ally against the West Nile virus, as the individuals consume Culex mosquito larvae.[18] They also are used as a biological pest control in Japan, eating weeds in rice paddies. The Beni-Kabuto Ebi Albino variant of T. cancriformis is particularly valued for this purpose. In Wyoming, the presence of T. longicaudatus usually indicates a good chance of the hatching of American spadefoot toads.

Dried eggs of T. longicaudatus are sold in kits to be raised as aquarium pets, sold under the name of "aquasaurs", "trigons" or "triops". Among enthusiasts, T. cancriformis is also common. Other species often encountered in captivity include T. australiensis, T. newberryi and T. granarius.

Captive Triops are frequently kept in aquaria and fed a diet consisting mainly of carrots, shrimp pellets and dried shrimp.[19] Often they are also given living shrimp and Daphnia as live prey.[20] Because they can feed on just about anything they are also fed lunch meat, crackers, potatoes etc.[21]

In California, T. longicaudatus has emerged as a significant pest of rice cultivation, due to its digging behaviour uprooting young rice seedlings.[22]

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The cane toad has poison glands, and the tadpoles are highly toxic to most animals if ingested. Its toxic skin can kill many animals, both wild and domesticated, and cane toads are particularly dangerous to dogs. Because of its voracious appetite, the cane toad has been introduced to many regions of the Pacific and the Caribbean islands as a method of agricultural pest control. The common name of the species is derived from its use against the cane beetle (Dermolepida albohirtum), which damages sugar cane. The cane toad is now considered a pest and an invasive species in many of its introduced regions. The 1988 film Cane Toads: An Unnatural History documented the trials and tribulations of the introduction of cane toads in Australia.

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