Aphids are associated with loss in yield and quality of pepper crop due to damage they cause and the transmission of viruses in a non-persistent manner. The aim of the study was to determine the potential of border crops and intercrops in the management of aphids and the associated viruses in hot pepper production. Field experiments were carried out for two seasons in 2018/2019 at Rubona Research station, Huye District, Rwanda. Maize (Zea Mays L.), sorghum (Sorghum bicolor L.) and sunflower (Helianthus annuus) were tested as companion crops associated with hot pepper either as border crops or as intercrops. Randomized complete block design was used with four treatments and three replications per experiment. Data on aphid population, the virus disease incidence, the area under the disease progress curve (AUDPC), growth and yield of hot pepper were recorded. Diseased leaf samples were collected and analysed serologically to detect the viruses present in the experimental plots. Aphid-transmitted viruses; Cucumber mosaic virus, Potato virus Y and Pepper veinal mottle virus, and aphid species, namely Aphis gossypii and Macrosiphum euphorbiae were identified in the experimental plots. The use of maize, sorghum or sunflower as border crops or as intercrops significantly reduced (p < 0.05) the incidence of viral diseases in hot pepper compared with control at later stages of growth. At 12 weeks after transplanting (WAP), use of maize, sunflower or sorghum as border crops significantly reduced (p < 0.05) the incidence of viral diseases by 24%, 31% and 38% compared with the control in season one and by 32%, 54% and 46% in season two. Similarly, intercropping with maize, sunflower or sorghum was also effective in reducing incidence of viral diseases in hot pepper by 24%, 35% and 27% in season one, and by 39%, 39% and 32% in season two, respectively. The AUDPC differed significantly (p < 0.05) while the population of aphids did not differ (p > 0.05) among treatments for both experiments. Results revealed that maize, sorghum and sunflower can be utilized either as border crops or intercrops for the control of viral diseases in pepper production. This technology is environmentally friendly, easily adaptable and appropriate since the production of pepper is mainly done by resource-poor farmers.

蚜虫由于其造成的损害以及以非持久性方式传播病毒而与胡椒作物的产量和品质下降相关。该研究的目的是确定边境作物和间作作物在辣椒生产中的蚜虫和相关病毒管理中的潜力。在2018/2019年期间，在卢旺达Huye区的Rubona研究站进行了两个季节的野外试验。玉米（Zea Mays L.），高粱（Sorghum bicolor L.）和向日葵（Helianthus annuus）作为边疆作物或间作作物与辣椒伴生作物进行了测试。每个实验使用随机完整区组设计进行四次治疗和三次重复。记录蚜虫种群，病毒病发病率，疾病进展曲线下面积（AUDPC），辣椒的生长和产量等数据。收集患病叶片样品并进行血清学分析，以检测实验田中存在的病毒。蚜虫传播的病毒；黄瓜花叶病毒，马铃薯病毒Y和胡椒脉状斑驳病毒以及蚜虫种类，即棉蚜和大戟在实验区中被确定。与生长后期相比，与对照相比，使用玉米，高粱或向日葵作边境作物或作间作作物可显着降低（p <0.05）辣椒中病毒性疾病的发生率。移植后第12周（WAP），与第一季和第二季相比，使用玉米，向日葵或高粱作为边境作物显着降低（p <0.05）病毒性疾病的发生率，与对照组相比分别降低了24％，31％和38％第二季分别为％，54％和46％。同样，与玉米，向日葵或高粱的间作也有效地使辣椒的病毒性疾病发病率在第一季减少了24％，35％和27％，在第二季减少了39％，39％和32％。AUDPC有显着差异（p <0.05），而蚜虫种群没有差异（p> 0）。05）在两个实验的处理方式之间。结果表明，玉米，高粱和向日葵可以用作边境作物或间作作物，以控制辣椒生产中的病毒性疾病。由于胡椒的生产主要由资源贫乏的农民完成，因此该技术对环境友好，易于适应且适用。