August 13, 2025
Soybeans range from mid R4 (full pod) to late R5 (beginning seed)
- Recent rainfall in some areas of the province have led to a decrease in moisture stress symptoms on soybean crops (such as leaf flipping and leaf clamping) in those areas and some lessening of concern by producers given that crops are now at the crucial seed and pod filling growth stages. However, areas of the province, such as the Interlake, remain significantly lacking in soil moisture with those soybean crops continuing to suffer from moisture stress and expected to be impacted in terms of yield. At the same time, there are a few areas of the province where recent rainfall bordered on the excessive, leading to saturated soils and standing water in fields. Given that soybeans tolerate these types of conditions more readily, producers in such areas are less concerned about yield impacts.
- Overall, soybean aphids did arrive in the Manitoba soybean crop but remained well below economic threshold levels.
- Two-spotted spider mites have been detected in soybean fields in Eastern and Central Manitoba along with some areas of the Interlake. Some insecticide applications to control this pest have occurred with most treatments being limited to field margins. Monitoring continues.
- Overall disease levels in soybeans, particularly for foliar diseases remain low. Some stem and root diseases, typically in headland areas of fields have been noted.
- A few instances of potassium (K) deficiency have been noted. For the most part this has been attributed to dry soil conditions preventing the uptake of soil K to meet plant demands during seed and pod filling.
- With the rainfall events in some areas of Manitoba, severe weather and hailstorms have occurred causing damage to soybean crops necessitating detailed field evaluations.
Field peas range from R6 (mid maturity) to R7 (full maturity) and drying down.
- Pre-harvest herbicide applications have been completed on most pea crops. Uneven maturity in some crops caused delays in pre-harvest applications or necessitated some areas of fields being left for later treatment. In areas that received rainfall, it is hoped the precipitation will assist with this issue.
- In areas that received higher levels of rainfall, and as a result, produced taller crops with thicker canopies, the lower stems of plants continued to rot and degrade causing some crop lodging. For the very most part, pod and seed filling remained unaffected.
- A very limited amount of field pea harvesting has occurred. Widespread harvesting of the field pea crop is expected to commence when good drying conditions return to production areas.
Dry beans range from R6 (50% seed) to R7 (full seed).
- Varying levels of white mould have been noticed in some fields, particularly in areas that received greater and more consistent rainfall amounts over the last few weeks.
- Grasshopper feeding has been causing some defoliation around field margins
Faba beans are at R5 (full pod) to R6 (beginning maturity)
- Overall, foliar and stem disease levels in faba beans have been low given the growing conditions this season. Some symptoms of white mould, anthracnose and Botrytis fabae or chocolate spot have been observed.
- Growers continue to monitor their faba bean crops lygus bugs as the crop moves towards completing seed and pod filling. Faba beans are susceptible to seed damage until seeds and pods are firm enough that lygus bugs cannot penetrate them any longer.