Wpływ środków ochrony roślin oraz bioregulatorów na liczebność drapieżnego roztocza dobroczynka gruszowca Typhlodromus pyri (Phytoseiidae)

The selectivity of some pesticides and bioregulators to the predatory mite Typhlodromus pyri (Phytoseiidae) was evaluated under laboratory and field conditions. Most of the tested preparations were classified as selective for T. pyri. This group includes fungicides: Tercel 16 WG (dithianon + pyraclostrobin), Flint Plus 64 WG (captan + trifloxystrobin), Signum 33 WG (boscalid + pyraclostrobin), Switch 62.5 WG (cyprodinil + fludioxonil), Captan 80 WG (captan), Topsin 500 SC (thiophanate-methyl), insecticides: Coragen 200 SC (chlorantraniliprole), Movento 100 SC (spirotetramat), Teppeki 50 WG (flonicamid), Agricolle (concentrated polysaccharide suspension), acaricides: Envidor 240 SC (spirodiclofen), Zoom 110 SC (etoxazole), bioregulator Asahi SL (sodium salts of 5-nitroguaiacolate as well as ortho- and paranitrophenolates), Regalis 10 WG (prohexadione-calcium) and herbicide Roundup 360 SL (glyphosate). A slightly higher mortality rate of predatory mites was found after the application of fungicides Kaptan Plus 71,5 WP (captan + triadimenol) and Frupica 440 EC (mepanipyrim). Fungicides: Dithane NeoTec 75 WG (mancozeb), Faban 500 SC (dithianon + pyrimethanil), Polyram 70 WG (metiram), insecticide Calypso 480 SC (thiacloprid) were classified as partially selective for phytoseiids. The insecticides Decis Mega 50 EW (deltamethrin), Acaramic 018 EC (abamectin) and the herbicide Basta 150 SL (glufosinate-ammonium) were highly toxic to the predatory mite T. pyri.