Symptoms Bronzing is a type of foliar crop injury that starts off as brown or bronze flecks on the upper leaf surface but spreads as plant cells die, leaving necrotic and chlorotic spots. Severe symptoms also include early senescence, leaf yellowing and loss, and rapid aging of the plant. (Campbell Fraser, 2009). Cause of Bronzing…Continue readingBronzing
Brown Stink Bug (Euschistus servus) Green Stink Bug (Chinavia hilaris) Brown Marmorated Stink Bug(Halyomorpha halys) Description Three types of stink bugs can injure beans: green stink bugs, brown stink bugs and brown marmorated stink bugs. Green stink bug adults are large — about 2 cm (0.75 in.) long — light-green, shield shaped bugs. Brown stink…Continue readingStink Bugs
Photo credit: Megan Bourns Wireworm (Limonius spp., Agriotes spp., Hemicrepidius spp., and others) Crops at risk of wireworm damage are primarily corn and cereals, and occasionally/rarely soybeans, forages, dry edible beans and canola. Description Wireworms are larvae that are 2–40 mm (0.1–1.6 in) long, cylindrical, copper-brown-coloured and hardened with a distinct fat head. Adult wireworms are…Continue readingWireworm
Green Patch, sometimes called “crazy beans”, is a syndrome occurring in Ontario dry beans for which a cause has not been identified. It is so called because at harvest time when most plants are maturing and drying down, patches will remain green and growing. The greenness of plants is not in itself a major concern,…Continue readingGreen Patch
This article is intended to briefly answer questions surrounding WBC in Ontario dry beans. More comprehensive information can be found in the OMAFRA Infosheet on WBC or in other WBC articles on this website. You can also check FieldCropNews.com for timely updates or follow @TraceyBaute and @megnmoran on Twitter. Where are they in Ontario? Western…Continue readingWestern Bean Cutworm Quick Guide
White mold is an important disease of dry beans in Ontario and in-crop management of white mold occurs during flowering. White mold spores can land on stems, leaves or pods but deteriorating flower petals are very susceptible to infection. Spores colonize flower tissue, and the disease enters other healthy plant tissues when infected flower petals…Continue readingWhite Mould: In-Crop Disease Development and Management
White Mould (Sclerotinia sclerotiorum) Incidence White mould is a difficult disease to predict, although most years the appearance of the disease is higher in dry edible beans than in soybeans. The disease is most damaging when cool (moderate), wet conditions occur during flowering or near harvest. Appearance Initial infection takes place on plant tissue such…Continue readingWhite Mould
Soybean Cyst Nematode (Heterodera glycines) Although soybeans are the major host, soybean cyst nematode (SCN) has a wide range of hosts that includes dry edible beans. SCN has been increasing in edible bean-producing areas of the province. Planting dry edible beans into SCN-infested fields can result in an increase in root rot complex infection, since…Continue readingSoybean Cyst Nematode (SCN)
There has been a huge amount of focus on dry bean breeding dealing with resistance towards common bacterial blight (CBB) caused by the seed borne bacteria Xanthomonas axonopodis pv. phaseoli (Xap) and X. fuscans pv. fuscans (Xff). This bacterium is controlled through the use of certified seed, however the bacteria can overwinter on crop debris…Continue readingBacterial Brown Spot Observations in Ontario Dry Beans (2019)
Photo credit: Tracey Baute Mexican Bean Beetle (Epilachna varivestis) Description Mexican bean beetle infestations are rare in Ontario. Mexican bean beetle is the only member of the lady beetle family in Ontario that feeds on plants. All the other lady beetles are beneficial predacious insects. The adult beetles are oval in shape, approximately 6 mm (0.25…Continue readingMexican Bean Beetle
