Annual species are often planted for their allelopathic properties. "L. leucocephala" is an allelopathic tree. Singrin is also known to be allelopathic. The spraying of nematicides also causes plants to release allelopathic chemicals. Allelochemicals with negative allelopathic effects are an important part of plant defense against herbivory. Japonica rice is more allelopathic than Indica and Japonica-Indica hybrid. It also has allelopathic effects on other plants. Lichens produce allelopathic chemicals that inhibit the growth of mosses. Natural phenols can be involved in allelopathic interactions, for example in soil or in water. The fern may have allelopathic effects, preventing the growth of other plants. In addition to outcompeting species for resources, the grass also exhibits allelopathic tendencies. Allelopathic effects of "Calotropis" on different agricultural crops have been well studied. The species can be strongly allelopathic, preventing other plants from growing nearby. Allelopathic effects of macroalgae on Pocillopora acuta coral larvae. It may also have allelopathic effects on other plants, preventing their growth.