The new Devrinol formulation, Devrinol DF-XT, is still a fifty percent dry flowable formulation, but includes UV (ultraviolet light) protection, so the product is no longer broken down on the soil surface by sunlight. [Read more…]
May 8, 2013 Brad Majek
A Generic Clopyralid (STINGER) Product Called SPUR is Labeled for Asparagus
Clopyralid, marketed under the trade name STINGER, was labeled for use in asparagus for years. About eight years ago Dow removed asparagus from the Stinger label due to liability concerns. A generic version of clopyralid called SPUR, produced by Albaugh Inc., is now available and includes asparagus on the label with a 48 hour PHI.
April 20, 2013 Brad Majek
Stinger Labeled for Blueberries
Stinger has been labeled for weed control in stone fruit orchards, including peaches, nectarines, apricots, plums, and cherries. The weeds controlled fall into two botanical plant families, composites and legumes. Common composite weeds found in our orchards include Canada thistle and other thistles, goldenrod species, aster species, common dandelion, mugwort (wild chrysanthemum), horseweed (marestail or stickweed), and ragweed species. Legume weeds include vetch species and clover species. [Read more…]
April 1, 2013 Brad Majek
Perennial Weed Control Using Cultural/Mechanical Techniques
Most annual and perennial weeds reproduce from seed, but many perennials also reproduce vegetatively. Examples of vegetative reproductive parts of weeds include stolens, rhizomes, roots, tubers, bulbs, and nutlets. Bermudagrass has stolens, which are above ground horizontal stems. Quackgrass spreads by rhizomes, which are underground horizontal stems. Canada thistle, milkweed, hemp dogbane, horsenettle, and bindweed species have a deep complex root system with distinct vertical and horizontal roots. Wild bean has tubers. Nutsedge has nutlets that can live dormant in the soil for several years. Perennial weeds are much more difficult to control than annual weeds. [Read more…]
March 27, 2013 Brad Majek
Annual Weed Control for Established Blueberries
The program for the control of annual weeds in blueberries should consider the weed free strip under the row and the middles, sod or tilled, separately. The “Weed Control Season” in blueberries starts in late fall. The program implemented in the spring depends on what herbicides were applied the previous fall. If herbicides were applied in late fall, applications may be able to be delayed until later in the spring. Residual herbicides should be applied before bud break in late winter or early spring after the soil is no longer frozen if no late fall treatment was applied. [Read more…]
March 26, 2013 Brad Majek
Annual Weed Control in Vineyards
The program for the control of annual weeds in the vineyard should consider the weed free strip under the trellis and the sod middles between the rows separately. The “Weed Control Season” starts in late fall, after harvest. The program implemented in the spring depends on what herbicides were applied the previous fall. If herbicides were applied in late fall, applications can be delayed until later in the spring. Residual herbicides should be applied in late winter or early spring after the soil is no longer frozen, if no late fall treatment was applied. [Read more…]
