Australia

Grey mold (botrytis rot, botrytis blight)

Botrytis cinerea

The fungus belongs to the Sclerotiniaceae within the Ascomycetes. The anamorph stage Botrytis cinerea has a worldwide distribution. However, it is not clear how widespread and frequent the teleomorph B. fuckeliana is. It is concluded that sexual reproduction might be an important source of genetic variation.
The fungus grows well on artificial media. The anatomy and morphology of the mycelium of B. fuckeliana are typical of the Ascomycota. Septa are present and are perforated by a simple pore. The mycelium is composed of brownish olive hyphae. Anastomoses between hyphae are often noted. Conidiophores are frequently 2 mm or more long, mostly 16-30 µm wide with often a swollen basal cell. The conidia are ellipsoidal or ovoid, generally with a slightly protuberant hilum. They are dry and hydrophobic, colorless to pale brown, smooth, 6-18 x 4-11 µm (mostly 8-14 x 6-9 µm). In mass the conidia are grey-brown.
Grey mold is a blight or rot of immature, fleshy or senescent tissues. Lesions develop as tan or brown, water-soaked areas, which may become greyish or dried out. The profuse grey-brown sporulation of the fungus on old diseased tissue is characteristic. Buds and young shoots of grapevine may be infected, turn brown, and dry out. On a few leaves reddish brown, necrotic lesions appear on the vines. Before capfall, the fungus may invade inflorescences, which rot and fall off. From these sites it attacks the pedicel or the rachis. From ripening onward, the grapes are infected, especially through wounds. The mold progressively invades the entire cluster. Infected white grapes turn brown, and black grapes become reddish.

Pesticides
Amistar 250 SC
intensity: ★★★
Aprisco 900 WG
intensity: ★★★
Bravo
intensity: ★★★
Bravo Weather Stik
intensity: ★★★
Captan 800 WG
intensity: ★★★
Cavalry Weatherguard
intensity: ★★★
Cherokee 900
intensity: ★★★
Chief 250
intensity: ★★★
Chief Aquaflo
intensity: ★★★
Conan 500
intensity: ★★★
Conan 720 SC
intensity: ★★★
Dithane Rainshield Neo Tec
intensity: ★★★
FMC Captan 900
intensity: ★★★
FMC Chlorothalonil 720
intensity: ★★★
FMC Chlorothalonil Bond 720
intensity: ★★★
Fontelis
intensity: ★★★
Frenta 750 WG
intensity: ★★★
Howzat SC
intensity: ★★★
Manzate DF
intensity: ★★★
Mirador 250 SC
intensity: ★★★
Ospray Captan WG
intensity: ★★★
Penncozeb 750 DF
intensity: ★★★
Polyram DF
intensity: ★★★
Predict 600 SC
intensity: ★★★
Rotam Aprisco
intensity: ★★★
Rotam Escudo 250 SC
intensity: ★★★
Rovral Aquaflo
intensity: ★★★
Rovral Liquid
intensity: ★★★
Scala 400 SC
intensity: ★★★
Scholar
intensity: ★★★
Shelby 250
intensity: ★★★
Solaris 300 EC
intensity: ★★★
Subscribe
intensity: ★★★
Tecto SC
intensity: ★★★
Teldor 500 SC
intensity: ★★★
Thiraflo Flowable
intensity: ★★★
Unizeb Disperss 750 DF
intensity: ★★★
Amistar WG
intensity: N/A
Arysta LifeScience Mancozeb 750 WG
intensity: N/A
Azaka
intensity: N/A
Barrack 720
intensity: N/A
Blue Shield DF
intensity: N/A
Boomer
intensity: N/A
Capitaine 900 WG
intensity: N/A
Captan 800WG
intensity: N/A
Captan 900WG
intensity: N/A
Captan WG
intensity: N/A
Chlornil 720 SC
intensity: N/A
Chloronil Pro
intensity: N/A
Chlorothalonil
intensity: N/A
Clash Dry 900 WG
intensity: N/A
Clash Storm Guard 720 SC
intensity: N/A
Corvette Flowable
intensity: N/A
Corvette Liquid
intensity: N/A
Drover Guard 500 SC
intensity: N/A
Duplex WG
intensity: N/A
Echo 720
intensity: N/A
Evershield Seed Treatment
intensity: N/A
Iprine 250
intensity: N/A
Iprine 500
intensity: N/A
Iprodione
intensity: N/A
Iprodione Aquaflo
intensity: N/A
Liquicop
intensity: N/A
Mancoflo
intensity: N/A
Manzeb
intensity: N/A
Metapris 500 SC
intensity: N/A
Missile
intensity: N/A
Motac 500 SC
intensity: N/A
Orthocide WG
intensity: N/A
P-Pickel T
intensity: N/A
Pacific Echo 500 SC
intensity: N/A
Panoctine
intensity: N/A
Prolectus
intensity: N/A
Rinkals
intensity: N/A
Spartacus 250 SC
intensity: N/A
Spartacus 500 WG
intensity: N/A
Sumiclex 500
intensity: N/A
Sumisclex Broadacre
intensity: N/A
Thiragranz
intensity: N/A
Transact
intensity: N/A