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New Prosaro fungicide offers protection for both wheat and barley
Jan. 4, 2009
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Bayer CropScience recently introduced the new combination fungicide to growers attending the Northern Ag Expo in Fargo.
“Prosaro has been a long time coming,” said John McGregor, a cereals product manager for Bayer CropScience. “It provides the broadest spectrum disease control available to maximize yield and profit potential in wheat and barley, since it controls both leaf diseases and scab.”
The fungicide produces both a curative and residual action against many leaf diseases, plus it offers the best available action on scab. Prosaro stops the penetration of the fungus into the plant, according to McGregor, and in addition, stops the spread of infection within the plant. This double action approach inhibits the reproduction and further growth of the fungus.
In providing scab control, Prosaro offers one of the best tools for reducing DON levels and scab activity, both of which will add to the grain yield and quality of the crop being produced, which means more potential profit to the grower, he noted.
The leaf disease control is obtained by penetrating the leaf and redistributing throughout the tissue, thereby offering protection on both the upper and lower leaf surfaces. The leaf disease is killed once it absorbs the fungicide, halting the infection process, while the curative action of Prosaro halts the spread of leaf diseases to healthy plant tissue, and the residual activity protects the leaf from new infections.
Among the foliar diseases controlled on wheat are leaf rust, stem rust, Septoria leaf and glume blotch and tan spot, according to Randy Myers, Bayer CropScience fungicide portfolio manager.
Barley leaf diseases controlled by Prosaro include net blotch, spot blotch, rusts and scald.
“Prosaro raises the bar for disease management while improving overall plant health,” Myers said. “Growers can bank on the fact that Prosaro is already being used with confidence in Europe, where cereal disease pressures are consistently high.”
For best results Prosaro should be applied at 6.5 ounces per acre under normal conditions, but in a case of high disease pressure the rate can be increased to 8.2 ounces per acre. For optimal scab activity on wheat, Prosaro should be applied at the Feekes growth stage of 10.51. However, since barley flowers in the boot, application on barley should be made a little earlier, at the 10.5 stage.
Myers noted that in areas not threatened by scab infections, the fungicide may be applied at an earlier growth stage for control of yield-limiting foliar diseases.
McGregor also mentioned that farmers seeding the more scab resistant varieties of wheat could probably get by with the lower rate application, but for those varieties with little scab resistant, the higher rates would offer more protection.
In university tests and field trials done from 2001 to 2007, Prosaro have an average yield increase of 6.91 bushels per acre when compared to an untreated check, McGregor pointed out, with a positive yield response reported in 94.6 percent of all trials.
During the same time period, average barley yields increased by 6.95 bushels per acre when compared to untreated check plots and a positive yield response was seen in 87.5 percent of all trials.
Source: Farm And Ranch Guide
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