Which two herbicides are known to be toxic to aquatic invertebrates at recommended doses?

Acrolein and xylene are recognized for their toxicity to aquatic invertebrates, even when applied at recommended doses. Acrolein acts as a herbicide and can be particularly harmful to a range of aquatic organisms, including invertebrates. It disrupts biological systems, affecting their growth and survival due to its chemical properties, which include being a potent irritant.

Xylene, while primarily known as a solvent, can also pose risks to aquatic life, particularly at concentrations that can occur around spaces where it is used or released. It can accumulate in water bodies, leading to toxic effects on various aquatic organisms.

The other options consist of herbicides and pesticides commonly used in agricultural practices but do not share the same level of documented toxicity to aquatic invertebrates at normal use levels. Understanding the specific environmental impacts of herbicides aids in making informed decisions for aquatic pest control, ensuring that practices do not inadvertently harm vital ecosystems.