Conservation Evidence: Evidence Data

Collected Evidence: Collected Evidence: Stop using herbicides on pavements and road verges Two studies evaluated the effects on butterflies and moths of stopping the use of herbicides on pavements and road verges. One study was in the USA and the other was in Canada. COMMUNITY RESPONSE (2 STUDIES) Richness/diversity (2 studies): One replicated, paired, site comparison study in the USA found that restored roadside prairies where herbicide application was restricted had a greater species richness of butterflies than verges dominated by non-native weeds and grasses with no restrictions on herbicide application. One replicated, site comparison study in Canada found that transmission lines (road verges and power lines) which were neither sprayed with herbicide nor mown had a similar species richness of butterflies to sprayed and mown transmission lines. POPULATION RESPONSE (2 STUDIES) Abundance (2 studies): One replicated, paired, site comparison study in the USA found that restored roadside prairies where herbicide application was restricted had a greater abundance of butterflies than verges dominated by non-native weeds and grasses with no restrictions on herbicide application. One replicated, site comparison study in Canada found that transmission lines (road verges and power lines) which were neither sprayed with herbicide nor mown had a greater abundance of northern pearl crescent and pearl crescent butterflies, but similar total butterfly abundance, compared to sprayed and mown transmission lines. Survival (1 study): One replicated, paired, site comparison study in the USA found that butterflies had a lower mortality risk on restored roadside prairies where herbicide application was restricted than on verges dominated by non-native grasses with no restrictions on herbicide application. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3899https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3899Tue, 09 Aug 2022 15:00:37 +0100Collected Evidence: Collected Evidence: Stop using pesticides as seed dressings and sprays in flower beds and greenspace One study evaluated the effects on butterflies and moths of stopping the use of pesticides as seed dressings and sprays in flower beds and greenspaces. The study was in France. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (1 STUDY) Abundance (1 study): One replicated, site comparison study in France found that gardens where insecticides and herbicides were not used had a higher abundance of butterflies, but gardens where fungicides and snail pellets were not used had a lower abundance of butterflies BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3900https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3900Tue, 09 Aug 2022 15:03:07 +0100