Yes, the magnolia could absorb the Helena Crossbow Herbicide once applied as it stays in the soil for up to 1 year.
No, Helena Crossbow Herbicide is not labeled for witchgrass.
No, Helena Crossbow Herbicide is herbcide labeled for woody plants and brush. This is not an insecticide that will armyworms or other insects. Bifen IT is a popular choice for tent caterpillars aka armyworms and applied at the mix rate of 0.5 fl oz to 1 fl oz per gallon of water.
Per the Bifen IT product label to treat for armyworms: Directly spray the plant foliage and nest. The larvae are usually easy to contact if spraying is done in the late morning when the larvae congregate on the tent surface to warm in the sun. Mechanical control is also helpful with this pest. The egg masses are easy to spot after the leaves have dropped in the fall. Simply clip off and crush or drop into a bucket of soapy water.
No, as long as you dilute what you need to use at a time Helena Crossbow Herbicide will not damage the pump of your sprayer. However, it is not recommended to store any pesticides in a tank for long periods of time because this will wear out the gaskets and pump faster. Mix what you will need to use within 24 hours and rinse out your sprayer after each use. Since your sprayer is a 45 gallon tank, we also recommend checking with the manufacturer.
Unfortunately, the extent of injury to the Royal Purple Liriope and soil is going to be difficult to determine. With the product label precautions and advising to be cautious of wind drift, preventing overspray and to avoid spraying desirable plants with Helena Crossbow Herbicide, it is really a wait and see. The product label states, excessive amounts of this herbicide in the soil may temporarily inhibit seed germination and plant growth. The residual of Crossbow Herbicide in the soil can remain for up to 1 year therefore it is recommended to wait 1 year after an application to replant in the treated areas. Otherwise, remove and replace the soil with fresh untreated soil, wait 3 weeks to replant in that area where the Crossbow was applied.
The best method to remove woody plants and shrubs is to first cut down them down to their stump and apply Helena Crossbow Herbicide on the fresh cut or spot treat as best as you can. If enough of the solution contacts the young trees roots it could injure them.
While the product label for Helena Crossbow Herbicide does make reference to "non-irrigation ditchbank," this question is a little bit outside our area of expertise. We recommend contact the manufacturer directly Helena Agri-Enterprises at (901)761-0050.
Helena Crossbow Herbicide is not labeled to be applied indoors therefore we would recommend contacting the manufacturer for further details on the off label use for further safety and re-entry information.
In the future, we would recommended to trim/cut the ivy from the outside that is growing on the side or into the shed. Apply Helena Crossbow Herbicide directly to the freshly cut ivy and hand pull or manually pull ivy out from the cracks and gaps going into the shed.
Crossbow Herbicide is not labeled to control zoysiagrass and unfortunately, there is not a selective herbicide labeled to control zoysiagrass. The best recommendation would be to spot treat the unwanted grasses with a glyphosate product like Roundup Quik Pro and reseed 2 weeks after the last application as it may take multiple applications to kill it.
While Crossbow is labeled to to treat woody plants and vegetation, Japanese sedge is not specifically listed on the product label as a controlled weed and it is not labeled for sedges at all.
We do not recommend burning any wood after it has been treated with an insecticide or a herbicide like Helena Crossbow Herbicide .
2,4-D compounds are systemic herbicides and will translocate slowly down to the roots. Helena Crossbow containing the 2, 4-D active ingredient would work with the same mode of action however St. Johnswort (goat weed) is not listed on the product label as one of the weeds it will control therefore we cannot advise on the efficacy it would have on the weed.
Some alternative options that are labeled for St. Johnswort (goat weed) would be Bonide Poison Ivy and Brush Killer BK-32 Concentrate (Dicamba and Triclopyr) , Chaparral Herbicide (Metsulfuron methyl) or Alligare 2,4-D Amine Herbicide( 2,4-D). Also using a non selective glyphosate product such as RoundUp is commonly used to spot treat harder to kill weeds.
Review the product labels for application rates and information on Tank Mixing Herbicides if allowed for better results.
St. Johnswort is best treated by spot spraying when it is in flower (Nov–Jan) because it can be easily seen then and is at its most sensitive period to herbicides. Spraying should begin six to eight weeks after substantial rain and when St John’s wort reaches the 50% yellow bud – 50% open flower stage.
