There are several known parasites/pests that infect plants. Fungi cause the majority of plant diseases. Although they typically feed on dead organic matter, fungi can also feed directly on living tissues. Some parasites attack and eventually kill plants by blocking water flow through the plant. Bacterial plant diseases include fire blights, certain soft rots, and citrus canker. The bacteria that cause these diseases destroy tissue or block the passage of water through the plant. Numerous viruses also attack plants. Certain insects and worms parasitize the roots, stems, and leaves of plants. They secrete chemicals that induce plant cells around the parasite to rapidly divide and produce large growths known as galls. Galls formed by the root knot nematode can cause serious physical damage to the roots of important crops including tomatoes and tubers.

Some higher plants feed on other plants and cause them harm. One group known as hemiparasites, or water parasites, absorbs water and nutrients from their plant hosts. Witchweed is a hemiparasitic seed plant that damages sweetcane, corn, and other grasslike crops by attaching itself to the host's roots and absorbing minerals and water, eventually killing the host. Avians that eat certain berries, which pass through their digestive tracks, are excreted, and sometimes stick to a tree branch where they produce a new parasitic plant.

True plant parasites lack chlorophyll and cannot photosynthesize. These plants must obtain carbohydrates as well as minerals and water from their plant hosts.

| Main Page | Rankings | Skills| Lessons|

| Stand Orders | Stand Selling | Stand Prices |

| Flora List | Logs | HT ||