What is a crucial consideration when applying insecticidal soaps to plants?

When applying insecticidal soaps to plants, it is crucial to consider that certain plant species may be sensitive to the soap's active ingredients, which can lead to leaf burn or damage. This sensitivity is largely dependent on the plant's characteristics, such as leaf thickness and waxiness. For example, plants with tender foliage or those that are already stressed from environmental conditions may be particularly susceptible to the potential harmful effects of insecticidal soaps.

Correctly identifying these sensitive species helps in making informed decisions about application timing, dilution rates, and even the type of soap used. If applied indiscriminately to all plant types without knowledge of their reactions, the benefit of pest control could be overshadowed by damage to the plants, reducing their overall health and aesthetic quality. This consideration is key to minimizing harm while effectively managing pest populations.