Crossbow is not actually labeled to control English Ivy. The best thing would be a glyphosate based product like Roundup QuikPro to spot treat. Care should be taken to avoid desirable plants as it can harm them as well.
According to the Crossbow product label: Except for lactating dairy animals, there are no grazing restrictions after using this product. They should not be present during the application and while the surfaces are wet but can return when dry.
Crossbow Herbicide and other herbicides are best applied when the weeds or brush are actively growing and healthy. If the target weed is going into dormancy it would not be effective. Please see the product label for complete instructions for your particular application.
Yes, the Crossbow Herbicide is non toxic for bees when use in accordance with the product label.
According to the Crossbow product label: Except for lactating dairy animals, there are no grazing restrictions after using this product.. Do not allow lactating dairy animals to graze treated areas until the next growing season following application of Crossbow Herbicide.
Crossbow Herbicide will typically have an effect on brush and trees when applied to the root system. However, some applications require root applications while others only need a foliar application. It is very important that you read the Crossbow Herbicide product label and follow it exactly.
Crossbow Herbicide is not labeled for bamboo, however we have heard if you cut down the bamboo level with the ground and apply Crossbow or a similar Triclopyr based product undiluted to the fresh cut it can help kill it out. Bamboo is extremely stubborn, so it can take several steps to remove it completely. You can use Round Up QuickPro at the highest listed usage rate to help eliminate bamboo. You will be required to cut the bamboo down to a short stump and then apply the Round Up QuickPro. It can take several applications to achieve the desired results.
Crossbow Herbicide can harm grasses if applied when temps are over 85 degrees. Be sure that you apply when temps are below 85 degrees and in the morning or later evening.
Crossbow Herbicide is a post emergent herbicide that does kill down to the roots. However on some hard-to-control weeds such as thistle, it may require mutlitple applications to fully kill the weed off.
Crossbow Herbicide can be used to kill dormant blackberry bushes and vines. You would apply to thoroughly wet upper and lower stems including the root collar and any ground sprouts. Treat at any time when the brush is dormant and the bark is dry. Best results have been obtained with late winter to early spring applications. You will use 1.5 gals./acre broadcast application or 1 to 1.5% mixture. Please refer to the product label for complete mixing and application instructions.