June 21, 2010

Late Blight Makes An Appearance

Tom Ford, a Penn State Cooperative Extension agent covering Cambria and Somerset counties in Pennsylvania, responded to a call at a community garden in Blair County earlier this month. According to the Tribune-Democrat, Ford confirmed 50 to 75 tomato plants were infected with late blight. “I am actually very worried at this point,” Ford told the Tribune-Democrat. “If it gets warm and dry we may be OK, but these little cold fronts are especially bad for Cambria and Somerset because of the mountain areas. “It’s just a matter of time before we see more.” Late blight-infected plants were traced to a retail greenhouse in Somerset County, creating concern that many gardeners in Cambria County may have some of the infected plants, Ford says. Penn State officials are not identifying the Somerset business that sold the infected plants. Read the full Tribune-Democrat story here.

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June 3, 2010

Veranda O Label Expansion For Vegetables

Veranda O is particularly effective against botrytis and rhizoctonia on ornamentals and vegetables, according to OHP Director of Technical Services Jeff Dobbs. Rates are 4 to 8 fluid ounces per 100 gallons. Growers should use Veranda O preventatively; that is, when conditions are ripe for disease development. High humidity and cool, cloudy weather can be conducive to disease development. In the spring, growers should pay close attention to weather conditions and apply preventatively as needed. The product carries a 4-hour Restricted Entry Interval (REI) and is classified as a “biopesticide” by U.S. EPA. The short REI makes Veranda O a particularly good choice in the spring as nights are short and growers often look for products with short REI intervals. Veranda O has a 0 day preharvest interval on many vegetables. Veranda O, applied as a spray or drench, is soft on beneficial insects and predators. Veranda O is a […]

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June 3, 2010

Terrazole L Formulation Launch

Terrazole L, with its active ingredient etridiazole, is an effective soil fungicide for prevention and control of damping off, root rot, and stem diseases caused by pythium and phytophthora spp. in ornamentals and turf. Terrazole L may be used in greenhouses, nurseries, and on golf course tees and greens. The new liquid formulation offers several advantages including ease of mixing and application, lower use rates, and less odor than competitive liquid etridiazole-based fungicides. The new formulation is also ideal for chemigation applications, saving growers time and labor. The 44.3% emulsifiable concentrate (EC) formulation contains 4 pounds of the active ingredient etridiazole per gallon which is twice the amount found in competitive formulations. The increase in active ingredient means there is less solvent being used which means less odor for applicators. Additionally, research has shown this new formulation mixes readily with water and does not clog screens or filters.   Because […]

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June 3, 2010

Augeo Launch At Pack Trials

Many current PGRs are used for reducing height or crop stretch. Augeo works with the plant’s ability to release lower lateral buds and thus increase lateral branching. Augeo focuses on the young growing points of a plant (leaves and meristem). Augeo works like a chemical pinch and the end result is a reduction of the natural plant hormone auxin and the role it plays in holding back lower buds. With auxin production decreased, lower buds release, and the result is reduced apical dominance. Recent testing of Augeo has shown it to increase branching in herbaceous and woody type crops such as lantana, petunia, fuchsia, verbena and other crops including trees and shrubs. Growers are always looking for ways to increase the value of their crops. Augeo can help to improve a plants’ appearance by creating a thicker, fuller plant which is appealing to both growers and consumers. That’s just one […]

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May 11, 2010

Cleary Unveils Three New Fungicides

Three fungicides from Cleary Chemical were recently EPA certified. They are Torque, Affirm and Legend. Torque is a Tebuconazole formulation labeled for turf and ornamental uses. “This active ingredient has a long development history and excellent track record for turf disease management,” says Rick Fletcher, director of product development. Affirm WDG, meanwhile, is a replacement for Endorse WP. Affirm WDG represents a new 11.3 percent Polyoxin D formulation, which, according to Cleary, is 4.5 times more concentrated than Endorse. “In turf, the new 2.4 pounds per acre rate will greatly assist superintendents and growers by reducing the solids suspended in their application equipment,” Fletcher says. “This will be a huge benefit to the many applicators who tank mix products on a regular basis.” Legend, the third new Cleary fungicide to hit the market, is a 6 pounds-per gallon Chlorothalonil product made with Cleary’s Rainkote formulation technology. This new, easy mixing […]

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April 15, 2010

Fungicides: How Controls Impact Efficacy

Chemical control of plant disease remains a popular and often over-used mainstay of our industry. Even the best fungicides and bactericides work better when cultural control methods are used, as well. In fact, if you try to put the entire weight of disease control on the fungicides you apply after a disease appears, you will be out of business quite soon. You cannot afford to waste your money on fungicides if the deck is stacked against them working. Using an integrated disease management program is the only way to make sure you get the most out of your fungicides and bactericides. There are many factors in cultural control of plant diseases, but a few stand out in their effect on fungicide efficacy. Some factors, like new pots and sanitation, may be important in reducing disease but have relatively low impact on the ability of a fungicide to control the disease. […]

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April 15, 2010

OHP’s Veranda O Fungicide: Expanding Control

OHP’s Veranda O fungicide is now labeled for vegetables and bedding plants, meaning the battle against botrytis and rhizoctonia has a new ally. The addition of vegetables to the Veranda O label gives growers the added flexibility of purchasing one product that controls diseases on both ornamental and vegetable crops. Plus, control comes in the form of an environmentally friendly fungicide that is soft on mammals, beneficial insects and birds. The fungicide carries a four-hour restricted entry interval (REI). In addition to vegetable labeling, Veranda O is labeled for control of alternaria blight, anthracnose, botrytis, fusarium, powdery mildew, sclerotinia and rhizoctonia root and crown rot on ornamentals. Active as a spray or a drench, Veranda O contains the active ingredient Polyoxin D, a natural antibiotic and fermentation product of a soil bacterium. Veranda O is also an easy-to-use water dispersible granule (WDG) formulation that features a unique mode of action, […]

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February 17, 2010

Subdue MAXX Approved For 2 Diseases

Syngenta’s Subdue MAXX fungicide has been given updated label approval by the U.S. Environmental Protection Agency for foliar application to help prevent and control downy mildew and phytophthora.   Subdue MAXX can now be applied by ornamental growers and licensed lawn care operators as either a soil drench or foliar spray to container, greenhouse and field-grown nursery plants; non-bearing fruit and nut trees; commercial and residential landscapes; botanical gardens; and other non-residential landscapes.   Preventing loss from damaging pathogens with a responsible disease management plan is critical to managing costs, especially during these challenging economic times. Subdue MAXX can be rotated in as part of a well-planned disease management program. It is now also labeled for the prevention and control of Phytophthora ramorum, also known as Sudden Oak Death.   Features of Subdue MAXX include: –Fast uptake and broad-spectrum control. –Long-lasting, cost-effective control of damping-off and root and stem rot […]

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January 18, 2010

Adorn Combating Key Diseases

Adorn fungicide from Valent Professional Products has received Environmental Protection Agency (EPA) registration for control of downy mildew, Phytophthora and Pythium in greenhouses and nurseries. Available for use as a spray or drench, Adorn is a new chemistry featuring the active ingredient fluopicolide. Adorn is an excellent addition to fungicide rotations and plays a key role in resistance management programs. “Adorn is the only chemistry in its class, so there are no resistance issues and no cross-resistance issues,” says Jill Calabro, field market development manager and plant pathologist for Valent. “That provides a huge benefit for growers who find themselves in need of additional options in the fight against disease and in resistance management.” Researchers working with Adorn are seeing that it performs well against some of the most important diseases facing growers today. Margery Daughtrey, senior extension associate in the Department of Plant Pathology and Plant Microbe Biology at […]

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January 18, 2010

OMRI Approves RootShield WP

The Organic Materials Review Institute (OMRI) has approved BioWorks’ RootShield WP fungicide for use in organic production. RootShield WP, a wettable powder formulation, is applied through drip systems and drip irrigation booms used for soil drenches. It provides preventative control of major root diseases for up to 12 weeks per application, including pythium, fusarium, rhizoctonia thielaviopsis and cylindrocladium. It also protects by growing on roots and protecting them against damaging fungi. RootShield WP is registered for indoor and outdoor root disease control on greenhouse and outdoor ornamentals, herbs and vegetables, and has a zero-hour Restricted Entry Interval (REI), the lowest REI of all biological fungicides. “We have been eagerly awaiting this approval for organic use,” says John Francis, director of marketing and technical services of BioWorks. “We’re excited about being able to offer one of our most widely used products to organic growers.”   RootShield WP is available in 1-pound, […]

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January 6, 2010

Disease Management Strategies

Cornell University’s Margery Daughtrey and Michigan State University’s Mary Hausbeck are two of 15 speakers scheduled to present at the 26th annual Pest & Production Management Conference taking place in Orlando, Fla. Both Daughtrey and Hausbeck will be discussing plant diseases, a topic they recently discussed with Greenhouse Grower as the February 25-27 conference approaches. Late blight made the most headlines nationally in 2009, particularly in the Northeast where the weather was especially wet. Is there an effective late blight management program growers could employ for 2010? Don’t produce tomato transplants in a greenhouse where tomatoes are grown as a production crop. Destroy any potato cull piles near the greenhouses–remember this disease affects tomatoes and potatoes, as well as some Solanaceous weeds. Keep the greenhouse environment as dry as possible, which includes watering at a time of day when the foliage can dry quickly, keeping the relative humidity below 80 […]

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