Posted 16 June 2010. PMN Crop News.
Manage Costly Citrus Diseases with ENABLE 2F Fungicide
Unique mode of action offers control of greasy spot, citrus scab and sooty mold
Source: Dow AgroSciences Press Release. www.dowagro.com
Indianapolis, Indiana (June 15, 2010)--Citrus groves throughout the country are stricken with greasy spot every year, resulting in severe leaf defoliation, substantial yield reductions and long-term loss of vigor. The impact of greasy spot can be lessened with appropriately timed applications of ENABLE® 2F fungicide.
Greasy spot can drastically reduce the marketability of fruit, making management of the disease a must in any fruit grown for fresh or processed markets.
“Greasy spot is an endemic disease that is present throughout the citrus industry,” says Dr. Pete Timmer, professor emeritus at the University of Florida Citrus Research and Education Center. “If it goes uncontrolled, trees will lose leaves throughout the season, become weakened and experience a decline in production.”
Timmer says that preventive applications of a fungicide should be made to limit the effect of greasy spot. The active ingredient in ENABLE 2F, fenbuconazole, provides proven performance against greasy spot.
“ENABLE 2F prevents infection of the leaves and the fruit,” Timmer says. “The infection can be controlled by applying ENABLE 2F before the infection occurs or shortly thereafter.”
Sooty mold and citrus scab are two additional diseases that can be controlled by using ENABLE 2F. Sooty mold invades when insects like aphids, mealybugs and soft scales leave behind sticky honeydew when feeding on plant leaves. These insects can be managed with the efficacy and quick knockdown of LORSBAN® Advanced insecticide, which can help diminish the effect of these insects.
“Sooty mold won’t be as much of a problem if growers do a good job of controlling the insects that cause the disease, but it is a disease that will occasionally be a problem in the grove,” Timmer says. “ENABLE 2F does a good job controlling sooty mold.”
ENABLE® 2F fungicide is a triazole fungicide that belongs to the sterol inhibitor — or Group 3 — class of fungicides. As the only triazole fungicide labeled for disease control in citrus, ENABLE 2F is an excellent choice as a rotation partner for the prevention of fungicide resistance.
“The unique mode of action in ENABLE 2F is important, especially with citrus scab and greasy spot,” Timmer says. “Producers need to be aware of the potential problem that comes with using the same product over and over. A product rotation is certainly the way to go.”
ENABLE 2F is highly resistant to wash-off because of its deep penetration into the plant. It also offers a minimum of 14 days of residual activity and two to four days of reachback activity, offering extra protection against diseases currently present in the grove.
ENABLE 2F is compatible with oil and can be mixed with copper. Growers can obtain optimum disease control by thoroughly applying ENABLE® 2F fungicide with a nonionic surfactant or spray oil at the manufacturer’s recommended rate. The surfactant should not include a sticker.
To avoid resistance, growers should alternate fungicides with different modes of action and should not make more than three applications of ENABLE 2F per year.