What is the primary method through which bacteria cause plant diseases?

Bacteria primarily cause plant diseases by entering plants through wounds or natural openings. These entry points are critical because they provide a pathway for the bacteria to invade plant tissues. Natural openings include structures such as stomata and lenticels, which allow gas exchange but can also be exploited by pathogens. Additionally, wounds can result from physical damage, insect feeding, or environmental stress, making the plant more susceptible to infection.

By invading through these routes, bacteria can multiply within the plant and produce factors such as toxins or enzymes that disrupt normal plant functions, leading to disease symptoms. Understanding this primary method helps in developing strategies for disease prevention and management, highlighting the importance of plant care and integrated disease management practices.