A huge amount of orange peel waste is annually discharged into the environment. Processing of this waste for the control of post-harvest fruit diseases can reduce environmental pollution. Essential oils (EOs) from fruit peels of Citrus reticulata × sinensis (Sanh cultivar) and Citrus sinensis (Xoan, Mat and Navel cultivar) were investigated for their ability to control anthracnose caused by Colletotrichum gloeosporioides and Colletotrichum scovillei on mangoes. EOs were extracted by hydro-distillation and analyzed by GC-MS and GC-FID. The antifungal activity of the EOs was determined by in vitro and in vivo assays. The Mat cultivar had the highest extraction yield of 3% FW, followed by Xoan (2.9%), Sanh (2.2%), and Navel (1%). The chemical composition of the EOs was similar, with limonene as the main compound (around 96%). The antifungal activity of EOs was not different, with a minimum fungicidal concentration of 16% for both fungi. The disease inhibition of EOs increased with their concentration. The highest inhibition of anthracnose caused by both fungi on mangoes was achieved at 16% EO. EOs had no adverse effect on mango quality (pH, total soluble solids, total acidity, color and brightness of mangoes), except firmness and weight loss at high concentrations (16%). Orange EOs can be used as bio-fungicides to control mango anthracnose at high concentrations.

In order to provide references for further studies, this study attempts to summarize and present the current research situation regarding professional burnout among Chinese special education teachers on the basis of bibliometric analysis of academic articles about this topic in mainland China from 2007 to 2017. The findings are as follows: (1) there has been a significant increase in the number of articles and centralized distribution of research results; (2) limited research subjects and the lack of a research team are problems to be solved in the future; (3) there are limited research methods and constant expansion of the research content in the current research. According to the research situation, the following suggestions are proposed for follow-up research studies: (1) accelerating the construction of a research team and forming a stable research force; (2) expanding multidisciplinary and cross-system cooperation in research; (3) enriching research content and paying more attention to job burnout among special education staff in different areas and intervention strategies to improve the situation concerning SETs' professional burnout.