Identification Cereal aphids are a complex of three different species that infest cereals. Bird cherry-oat aphids (figure 1) are the most common aphid found in Ontario cereals. These aphids are small, 2 mm (1/12 in.) or less. Adults are olive-green with patches of red-purple near the rear of the abdomen, between a pair of “tailpipes” […]
Identification The primary symptoms of Barley Yellow Dwarf Virus (BYDV) include stunting and yellowing, reddening or purpling of the leaf tips (Figure 1 and 2). BYDV is often confused with nutrient deficiency or other environmental causes, or other virus diseases such as wheat spindle streak mosaic virus (WSSMV) or soil-borne wheat mosaic virus (SBWMV). Identifying […]
Growers across Ontario have been able to seed winter wheat this fall into almost perfect conditions, and there may be a record acreage seeded. A significant portion of winter wheat acres were seeded in September but with persistent summer like conditions, growers continued seeding well into late October. Early planted fields are well tillered with […]
Barley Yellow Dwarf Virus (BYVD) effects a wide range of grass hosts including wheat, oats and barley with oats being considered the most susceptible crop. In some regions of the province, BYDV has been reported as having a significant negative impact on oat yields. Appearance: The primary symptoms of BYDV include stunting and yellowing, reddening […]
Updated – May 27, 2020 There are several species of aphids that are grouped together as “cereal aphids”. The most common are bird cherry oat aphids (Figure 1) and corn leaf aphids (Figure 2), though English grain aphid and greenbugs can sometimes be found. The aphids would have been present since the fall and usually […]