Increased production of field pea (Pisum sativum L.) and faba bean (Vicia faba L.) in Canada has led to a greater incidence of disease and the range expansion of insect pests. Several soil-borne pathogens cause root rot in these crops, while the feeding activity of the pea leaf weevil (Sitona lineatus L.) significantly reduces nitrogen fixation. As pathogens and pea leaf weevil larva are associated with the roots of their mutual host, there is potential for synergistic interactions to occur that may ultimately reduce yield. Field trials at three locations in southern Alberta in 2016 and 2017 evaluated the use of insecticidal and fungicidal seed treatments, a foliar insecticide spray, alone and in combination, and nitrogen amendment as strategies to reduce impacts of both root rots and pea leaf weevil. The fungicides ethaboxam and fludioxonil did not reduce disease severity in pea or faba bean during the two-year field study. Quantitative PCR assays demonstrated that the pathogens Aphanomyces euteiches and Fusarium spp. co-infect pea roots under field conditions, but pathogen levels were not consistently reduced by any of the treatments. The insecticide thiamethoxam reduced nodule and foliar herbivory, whereas the foliar insecticide, lambda-cyhalothrin, and nitrogen fertilization at seeding had no consistent impact. No single or combined treatment protected yield or seed quality, therefore an effective method of managing these constraints to pea and faba bean production is still required.

加拿大的豌豆（Pisum sativum L.）和蚕豆（Vicia faba L.）增产导致疾病发病率增加和虫害范围扩大。几种土壤传播的病原体在这些农作物中引起根腐病，而豌豆叶象鼻虫（Sitona lineatus）的摄食活性L.）大大减少了固氮作用。由于病原体和豌豆叶象鼻虫幼虫与其共同寄主的根相关联，因此可能发生协同相互作用，最终可能降低产量。2016年和2017年在艾伯塔省南部的三个地方进行的田间试验评估了单独和组合使用杀虫和杀真菌种子处理，叶面杀虫剂喷雾以及氮改良作为减少根腐病和豌豆叶象鼻虫影响的策略。在为期两年的田间研究中，杀真菌剂依他波坦和氟地莫尼没有降低豌豆或蚕豆的病害严重程度。PCR定量分析表明，病原体是Aphanomyces euteiches和Fusariumspp。在田间条件下可共同感染豌豆根，但任何处理均未持续降低病原体水平。杀虫剂噻虫嗪可减少根瘤和叶面食草，而叶面杀虫剂λ-氟氯氰菊酯和播种时的氮肥施用却没有一致的影响。没有单一或联合处理能保护产量或种子质量，因此仍然需要一种有效的方法来解决对豌豆和蚕豆生产的这些限制。