Activity of some chemicals in the control of Botrytis cinerea on roses.
In the control of grey mould (Botrytis cinerea) on rose petals all 15 tested fungicides used as a spray, suppressed very effectively development of necrosis. But the best results in suppression of necrosis development, more than 90% effectiveness gave: Amistar 250 SC (azoxystrobin), Bravo 500 SC (chlorothalonil), Discus 500 WG (kresoxim methyl), Euparen 50 WP (dichlofluanid) Euparen Multi 50 WG (tolyfluanid), Folpan 80 WG (folpet), Kaptan zaw. 50 WP (captan), Penncozeb 80 WP (mancozeb), Ronilan 50 WP (vinclozolin), Rovral Flo 255 SC (iprudione), Sumilex 500 SC (procymidone) and Teldor 500 SC (fenhexamid). When Dithane M-45 80 WP (mancozeb), Sarbrawit 530 SC (chlorothalonil + carbendazim) or Topsin M 70 WP (thiophanate methyl) were used, the diameter of spots was about 6-times smaller than on control flowers (about 84% effectiveness). All tested fungicides used for spraying of flower petals with abundant visible sporulation of B. cinerea were ineffective in the inhibition of spore germination. But when Petri dishes with potato-dextrose-agar were sprayed with tested fungicides and inoculated with spore suspension, Euparen 50 WP, Euparen Multi 50 WG, Folpan 80 WG, Kaptan zaw. 50 WP and Penncozeb 80 WP completely suppressed conidia germination.
Wojdyła
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Research Institute of Pomology and Floriculture, Pomologiczna 18, 96-100 Skierniewice, Poland.
D020171:Botrytis / Q000187:drug effects* / Q000254:growth & development / Q000502:physiology; D004305:Dose-Response Relationship, Drug; D005659:Fungicides, Industrial / Q000494:pharmacology*; D018525:Germination; D010574:Pesticide Synergists; D027826:Rosa / Q000382:microbiology*; D013172:Spores, Fungal / Q000187:drug effects / Q000502:physiology
D005659:Fungicides, Industrial; D010574:Pesticide Synergists