Triticum compactum Triticum compactum Triticum compactum or club wheat is a species of wheat adapted to low-humidity growing conditions. "T. compactum" is similar enough to common wheat ("T. aestivum") that it is often considered a subspecies, "T. aestivum compactum". It can be distinguished by its more compact ear due to shorter rachis segments, giving it its common name. In the United States of America, nearly all "T. compactum" is grown in dry areas of the Pacific Northwest. "T. compactum" is a hexaploid with 21 chromosomes. "T. compactum", like other club wheats, has been selectively bred for its lower protein content. Due to
Cover crop ("Sinapis alba") and radish ("Raphanus sativus"). They can be grown after a main (cereal) crop and trap nematodes, for example the beet cyst nematode and Columbian root knot nematode. When grown, nematodes hatch and are attracted to the roots. After entering the roots they cannot reproduce in the root due to a hypersensitive resistance reaction of the plant. Hence the nematode population is greatly reduced, by 70-99%, depending on species and cultivation time. Other cover crops are used to attract natural predators of pests by providing elements of their habitat. This is a form of biological control known as habitat