What is the Mixture of concentrate crossbow for blackberries?

Answer 1

quoting from: http://www.hort.uconn.edu/cipwg/art_pubs/GUIDE/consideration.htm "The most important consideration when using any pesticide...is to read the label first!...Pesticide use in this country is...regulated by label language, thus it is a violation of state and federal law to use a pesticide product contrary to label directions. Specific statements on pesticide labels give precautions to be followed. Crossbow: 2,4-D + Triclopyr Triclopyr is a systemic herbicide that controls most broadleaf plants (herbaceous and woody) but not grasses or sedges at normal use rates. It is especially useful in brush control and for use on freshly cut stumps to prevent re-sprouting....Triclopyr is most effective when applied to actively growing plants. Woody plants treated late in the growing season are susceptible, but may not show injury symptoms until the following spring when leaves and stems fail to emerge or are greatly distorted." The article does not discuss 2,4-D which is an old stand-by for broad-leaf herbaceous weeds. The label must explain the mix procedures; however, Crossbow is formulated for large-scale use. DowAgro.com says: " Applications can occur in rangeland, permanent grass pastures, Conservation Reserve Program acres, fencerows, non-irrigated ditchbanks, roadsides and industrial sites." The label is actually not much help with mixing, stating for broadcast applications: "Use up to 1 1/2 gallons of Crossbow per acre in enough water to make 10 to 30 gallons of total spray per acre." For hand-spraying, it says to use 4-6 oz. in 3 gallons. If you follow that, you will be using the lowest concentration advised for Triclopyr, which is not adequate to kill blackberry. If you increase the concentration for that, you will also have greatly increased the normal concentration of 2,4-D which is for broadleaf weeds, and it will be a waste. If you have Crossbow on hand, and are using it as formulated for large areas, it has a good reputation particularly for rangeland. For blackberry and similar tough plants, it will be better to buy just Triclopyr (Garlon 3A for large amounts; read Ingredients for "brush and poison ivy killer" for smaller amounts) and use it as directed on the label -- which you are required by law to read and follow in any case.