prolly best keep away a few days if u can and dont apply if it gonna rain
http://pmep.cce.cornell.edu/profiles/extoxnet/carbaryl-dicrotophos/dicamba-ext.html
ACUTE TOXICITY
Dicamba is moderately toxic by ingestion and slightly toxic by inhalation or dermal exposure (
11). Symptoms of poisoning with dicamba include loss of appetite (anorexia), vomiting, muscle weakness, slowed heart rate, shortness of breath, central nervous system effects (victim may become excited or depressed), benzoic acid in the urine, incontinence, cyanosis (bluing of the skin and gums), and exhaustion following repeated muscle spasms (
2,
3). In addition to these symptoms, inhalation can cause irritation of the linings of the nasal passages and the lungs, and loss of voice (
11). Most individuals who have survived severe poisoning from dicamba have recovered within 2 to 3 days with no permanent effects (
11).
Dicamba is very irritating and corrosive and can cause severe and permanent damage to the eyes (
11,
14). Running water should be flushed through the eyes for at least 15 minutes if any dicamba is splashed into them (
5). The eyelids may swell and the cornea may be cloudy for a week after dicamba is splashed in the eyes (
3).
In some individuals, dicamba is a skin sensitizer (
5). It may cause skin burns (
15). There is no evidence that dicamba is absorbed into the body through the skin (
3).
The amount of a chemical that is lethal to one-half (50%) of experimental animals fed the material is referred to as its acute oral lethal dose fifty, or LD50. The oral LD50 for dicamba in rats is 757 to 1,707 mg/kg, 1190 mg/kg in mice, 2000 mg/kg in rabbits, and 566 to 3,000 mg/kg in guinea pigs (
3,
10). The dermal LD50 in rabbits is greater than 2,000 mg/kg (
10). The lethal concentration fifty, or LC50, is that concentration of a chemical in air or water that kills half of the experimental animals exposed to it for a set time period. The inhalation LC50 for dicamba in rats is greater than 200 mg/l (
11).