Issue link: http://read.dmtmag.com/i/31248
Grape fungicides available in 2011 for Washington State growers Active Trade names ingredients Class Abound Adament2 Fungicide choices in 2011 for powdery mildew management in Washington cherries Trade name Chemical name Class Abound azoxystrobin Adament2 Armicarb Cabrio Elite Gem Kaligreen Pristine2 Procure Regalia Quash Quintec Rally Regalia QoI tebuconazole + DMI trifloxystrobin QoI potassium bicarbonate pyraclostrobin QoI tebuconazole DMI trifloxystrobin QoI JMS Stylet Oil light summer oil PDSO potassium bicarbonate triflumizole sachalinensis metconazole quinoxyfen myclobutanil sachalinensis Rubigan, Focus, fenarimol Vintage, others Serenade Max Bacillus subtilis Sonata Sulfur Unicorn2 Bacillus pumilis sulfur Trade names in bold are new to the industry in 2011. 1 Fungicide Resistance Action Committee 2 Premix (formulation of two modes of action or FRAC groups) SOURCE: Gary Grove, Washington State University • When using Group 11 compounds as a solo product (Abound, Cabrio, and Gem), make sure the number of applications is no greater than a third of the total number of fungicide applications per season. • When using tank mixes or premixes of a Group 11 fungicide with a fungicide of another group (such as Adament or Pristine), limit the number of Group 11 fungicide (QoI)- containing applications to no more than half of the total number of fungicide applications per season. It also helps to tank-mix fungicides from different groups that are both effective against powdery mildew. • Try to include sulfur in every spray tank aimed at powdery mildew if it is permitted according to usage instructions on product labels and applying it is not detrimental to overall IPM objectives. Sulfur is a relatively inexpensive and effective companion product for mixing with medium- or high-risk compounds. • Always follow label instructions pertaining to application rates and intervals and always use a properly calibrated sprayer and sufficient spray volume to provide good coverage. Grape spray period The most critical period for powdery mildew control on grapevines is from the imme- diate prebloom to three weeks postbloom. Our most effective compounds should be utilized during this period. Bloom is also a critical period for the establishment of Botrytis bunch rot in the vineyard. As noted above, several of our highly effective grape powdery mildew fungicides/fungicide premixes (Adament, Flint, Inspire Super, and Pristine) provide activity against both powdery mildew and bunch rot when used according to label directions. • Trade (brand) names are provided for your reference only. No discrimination is intended, and other pesticides with the same active ingredient may be suitable. No endorsement is implied. www.goodfruit.com GOOD FRUIT GROWER MAY 15, 2011 33 FRAC Resistance group1 11 3 11 bicarbonate Not classified 11 3 11 Not classified bicarbonate Not pyraclostrobin + QoI boscalid carboximide DMI extract of Reynoutria Plant host inducer DMI Quinoline DMI extract of Reynoutria Plant host inducer DMI Biological Biological sulfur tebuconazole + DMI sulfur sulfur classified 11 7 3 P 3 P 3 44 44 M2 3 M2 Low High Medium Medium Low Medium 13 Medium 3 Medium Low Medium Low Low Low Medium Low risk High Medium High Low High Medium High Low Armicarb Flint Inspire Super2 azoxystrobin QoI tebuconazole DMI + trifloxystrobin QoI potassium bicarbonate trifloxystrobin QoI difenoconazole DMI + cyprodinil AP JMS Stylet Oil narrow-ranged PDSO petroleum oil Kaligreen Pristine2 Rally Regalia Serenade Max Sonata Quintec Rubigan3 Sovran Sulfur Unicorn2 Vivando potassium bicarbonate Carbonate pyraclostrobin QoI + boscalid Reynoutria sachalinensis Bacillus subtilis Bacillus pumilis quinoxyfen fenarimol3 Carboxamide myclobutanil DMI extract of Plant host inducer Biological Biological Quinoline DMI kresoxim-methyl QoI sulfur metrafenone 1 Fungicide Resistance Action Committee 2 Premix (formulation of two modes of action or FRAC groups) 3 Active ingredient (fenarimol) available under different trade names (e.g. Focus and Vintage) SOURCE: Gary Grove, Washington State University sulfur tebuconazole DMI + sulfur sulfur 44 44 11 Low Low M2 13 Medium 3 Medium High Low M2 3 Medium Low benzophenone U8 Medium 11 NC NC 11 High 3 Medium 9 Medium Low Low High 7 Medium 3 Medium P Low Carbonate FRAC Resistance group1 11 11 NC risk High 3 Medium High Low