Larissa Chamma

BACKGROUND: Stink bugs are among the most economically important pest complexes in soybean, causing direct injury to developing seeds, reducing physiological quality, and increasing reliance on insecticide‐based control. Although host plant tolerance is a central component of integrated pest management (IPM), its contribution to stabilizing seed physiological performance under field infestation remains insufficiently characterized within a genotype‐by‐environment interaction. We evaluated two contrasting parental lines and 12 recombinant inbred lines (RILs) across two soybean‐growing regions in Brazil under contrasting management scenarios (with and without insecticide application). Eight seed physiological traits related to germination, vigor, and longevity were assessed to determine the stability of host plant responses under stink bug exposure. RESULTS: Environmental effects predominated for early vigor traits, whereas seed longevity showed comparatively stronger genetic control. RILs 109, 186, and 227, together with the tolerant parent IAC‐100, maintained superior seed physiological performance under infestation, including in the absence of insecticide application. The Anhumas without insecticide‐based control environment provided the highest discriminatory power for identifying tolerant materials. Moderate to strong positive correlations among physiological traits suggest that longevity can serve as a robust decision trait to anticipate broader seed performance under pest stress. CONCLUSION: These findings demonstrate that host plant tolerance can mitigate stink bug‐induced losses in seed quality and support the integration of tolerant cultivars into sustainable pest management strategies, potentially reducing dependence on insecticides while enhancing production stability. This supports cultivar deployment as a proactive IPM tactic to buffer seed quality losses when chemical control is limited or inconsistent. © 2026 The Author(s). Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

Desiccation interrupts the acquisition of physiological quality in soybean seeds, as this quality peaks at R9. However, this interruption can be mitigated by the stage in which herbicide is applied and which herbicide is used. The aim of this study was to characterize the acquisition of physiological quality in soybean seeds from plants desiccated by herbicides at different stages. A completely randomized experimental design was used in a 3×6 factorial arrangement, consisting of three phenological stages (R6, R7.1, R7.3) and six different desiccant treatments (Diquat 1.5 L.ha^-1; Glufosinate 1.5 L.ha^-1 and 2.0 L.ha^-1; Diquat 1.0 L.ha^-1 + Glufosinate 1.0 L.ha^-1; Saflufenacil 140 g.ha¹ + Glufosinate 1.0 L.ha^-1; and Saflufenacil 140 g.ha^-1 + Diquat 1.0 L.ha^-1), with four replications. The following evaluations were made: desiccation rate, germination, desiccation tolerance (DT), longevity (P50), viability after one year of storage, and thousand seed weight. Seeds are able to germinate and have DT when plant desiccation through application of Diquat, Diquat + Glufosinate, Saflufenacil + Diquat, and Saflufenacil + Glufosinate occurs at R6, and for Glufosinate, at R7.1. The use of Diquat + Glufosinate and their combination with Saflufenacil showed less impact on acquisition of soybean seed longevity, which was better when application was made at R7.3.

The aphids control (Brevicoryne brassicae L.) in kale (Brassica oleracea L. var. acephala) is one of the main challenges for its production. This obstacle becomes greater in agroecological production systems. Thus, the objective of this study was to verify the formation of winged individuals in colonies of B. brassicae aphids, when exposed to kale treated with homeopathic solutions. The treatments were resistant 5CH, susceptible attacked 5CH, aphid nosode 30CH, and the controls that are water (without dynamization) and distilled water + 70% ethanol 5CH, being applied every day for 15 days. Kale plants were inoculated with aphids and irrigated using homeopathic solutions. After 15 days of inoculation, the plants were removed from the bag and the number of winged forms and nymphs of B. brassicae was counted. Homeopathic preparation Resistant 5CH provided a smaller number of winged individuals and a larger number of nymphs per colony. The plants treated with the susceptible attacked 5CH homeopathy showed a higher number of winged aphids, but a reduced number of nymphs. Aphid nosode 30CH treatment was promising to Brevicoryne brassicae control in kale plants, as it induced polymorphism, presenting a greater number of winged aphids and a reduced number of nymphs per colony.