Conservation Evidence: Evidence Data

Collected Evidence: Collected Evidence: Isolate colonies of beneficial antsNatural enemies: One replicated, controlled study from Australia found predatory ants occupied more cashew trees when colonies were kept isolated. Pest damage and yield: The same study found lower pest damage to cashews and higher yields. The crop studied was cashew.Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F773https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F773Tue, 20 Aug 2013 15:54:13 +0100Collected Evidence: Collected Evidence: Exclude ants that protect pestsParasitism: One of two replicated, controlled studies (one also randomised) from Japan and the USA found greater parasitism of pests by natural enemies when ants were excluded from trees. The other study found greater parasitism at one site but no effect at another. Natural enemies: Five studies (including four randomised, replicated, controlled trials) from Japan, Switzerland and the USA found effects varied between natural enemy species and groups, sampling dates, sites, crop varieties and ground cover types beneath trees. Pests: Three of seven studies (including four randomised, replicated, controlled trials) found fewer pests and another found fewer pests at times of peak abundance only. One study found mixed effects depending on date and other actions taken simultaneously (predator attractant and ground cover treatments). One study found no effect. Damage and tree growth: One study found no effect on damage to tree foliage but one study found greater tree growth. Ants: Six studies found that glue or pesticide barriers reduced ant numbers in tree or vine canopies. One study found that citrus oil barriers had no effect. Crops studied were cherimoyas, cherry, grape, grapefruit, orange, pecan and satsuma mandarin.Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F886https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F886Wed, 18 Sep 2013 16:13:44 +0100