Wheat rust

disease caused by several rust parasites in wheat. The main symptoms of the affected wheat during growth and development are bright yellow or red-brown powdery spots on the leaves or stalks.
under a
, many single-celled summer spores, known as summer spores, can be seen in the spot. They are produced by intrusion into mycelium in wheat plants. Wheat rust, in addition to producing summer spores, produces other types of spores throughout its life, producing up to 5
spores, but is still harmful to summer spores. Summer spores invade and spread rapidly, from invading new plants to producing new summer spores in just
8
to
12
days. caused a serious reduction in wheat production. There are

types of wheat rust: one is wheat strip rust, which is caused by the specialized parasitic bar-handle rust (wheat strip rust bacteria). The lesions mainly occur on the leaves, can also occur on the leaves and spikes, summer spores pile small, along the leaf veins arranged vertically into a dotted line, bright yellow. The disease mainly occurs in the winter wheat regions of North China, Northwest China, Southwest China and Huaibei. The other is wheat straw rust, which is caused by the rust of the handle, the lesions mainly occur in the leaf, stem and leaf base, and in severe cases also occur on the rice spike and mango. Sometimes it can cause a lot of damage in the short term. Summer spores pile red-brown, long oval, scattered, not arranged in strips. The bacteria is a transsexual parasite with
2,
hosts in the history of life, one wheat, on which summer spores and winter spores are produced, winter spores germinate to produce burden spores, and then on another type of plant, i.e. small pyridines or ten credit leaves, on which sex spores and rust spores are produced. Later the rust spores then attack on the wheat, carrying out a new cycle. But
of
5 species of spores, the most harmful to wheat is still summer spores. The disease has been found all over the country. The
3
is wheat leaf rust, which is caused by wheat hidden shank rust. The lesions mainly occur on the leaves and can also attack the leaves, rarely in the stalks or spikes. Summer spore pile round or near round, orange.。