Raoiella indica Hirst, 1924 (Prostigmata: Tenuipalpidae), is one of the leading pest mites in palm and banana trees, however, there are few control methods available for this pest species. Therefore, this work aimed t...Raoiella indica Hirst, 1924 (Prostigmata: Tenuipalpidae), is one of the leading pest mites in palm and banana trees, however, there are few control methods available for this pest species. Therefore, this work aimed to evaluate the acaricidal effect of soursop seed extract (Annona muricata L.) on R. indica adults. The experiment was conducted in a completely randomized design using soursop seed extract with 7 replicates and 12 individuals of R. indica per replicate. The experimental units consisted of discs of coconut palm leaves (4 cm in diameter), with cotton moistened at the bottom of the Petri dish (10.0 × 1.2 cm) and around the disc to maintain turgor and prevent mites from escaping. The application was performed using an airbrush, connected to a calibrated compressor with a constant pressure of 1.3 psi and 1 mL of solution per repeat plate. The acaricidal effect was evaluated 24, 48, and 72 hours after spraying. Mortality data were corrected and submitted to Probit analysis (p ≤ 0.05) using the statistical program R, with the LC50 and LC<sub>90</sub> calculated for the extract. At the maximum concentration (15%), the soursop seed extract showed mortality of 70% of individuals of R. indica, and the LC50 was 6.58%. It was concluded that the soursop seed extract showed acaricidal potential on R. indica in the laboratory.展开更多
The fungus Colletotrichum gloeosporioides,which is the causal agent of anthracnose disease in green-skinned avocados,is responsible for significant postharvest fruit losses.In this context,strategies should be conside...The fungus Colletotrichum gloeosporioides,which is the causal agent of anthracnose disease in green-skinned avocados,is responsible for significant postharvest fruit losses.In this context,strategies should be considered to avoid this problem.The use of essential oil(EO)can represent an alternative to contribute to antifungal activity,avoiding the use of chemical products,as their indiscriminate use can have harmful effects on human health.It is known that essential oil(EO)may exhibit antifungal activity and can be used as an alternative to chemical products.Therefore,the potential of using Lippia sidoides EO to control this fungus was investigated through in vitro evaluation(MIC and EC_(50))on C.gloeosporioides isolated from avocados.Furthermore,the potential of incorporating this oil with carboxymethylcellulose(CMC)for postharvest treatment in avocados was assessed in vivo to control anthracnose and maintain their physicochemical and sensory quality.The EO from L.sidoides demonstrated a MIC of 125μl L^(−1) and an EC_(50) of 46.83μl L^(−1) against this pathogen.The results indicated that the CMC edible coating associated with L.sidoides EO exhibited a positive effect on fruit quality during cold storage.In terms of sensory aspects,avocados treated with L.sidoides EO associated with CMC showed improved appearance compared to the control treatment.These findings suggest that L.sidoides EO has potential in the postharvest treatment of avocados.Additionally,these results are significant and unprecedented for this crop,as research on the postharvest effects of incorporating this EO with edible coatings in avocados is still limited.展开更多
Phar.Eur.Herbal Drug(HD)monographs state which aspects have to be considered for quality assurance through the relevant chapters'Definition'.'Characters','Identification','Tests',and...Phar.Eur.Herbal Drug(HD)monographs state which aspects have to be considered for quality assurance through the relevant chapters'Definition'.'Characters','Identification','Tests',and'Assay'.Identification of botanical material is achieved by macroscopic and microscopic morphology,generally examined by a trained expert.Content or assay is the most difficult area of展开更多
文摘Raoiella indica Hirst, 1924 (Prostigmata: Tenuipalpidae), is one of the leading pest mites in palm and banana trees, however, there are few control methods available for this pest species. Therefore, this work aimed to evaluate the acaricidal effect of soursop seed extract (Annona muricata L.) on R. indica adults. The experiment was conducted in a completely randomized design using soursop seed extract with 7 replicates and 12 individuals of R. indica per replicate. The experimental units consisted of discs of coconut palm leaves (4 cm in diameter), with cotton moistened at the bottom of the Petri dish (10.0 × 1.2 cm) and around the disc to maintain turgor and prevent mites from escaping. The application was performed using an airbrush, connected to a calibrated compressor with a constant pressure of 1.3 psi and 1 mL of solution per repeat plate. The acaricidal effect was evaluated 24, 48, and 72 hours after spraying. Mortality data were corrected and submitted to Probit analysis (p ≤ 0.05) using the statistical program R, with the LC50 and LC<sub>90</sub> calculated for the extract. At the maximum concentration (15%), the soursop seed extract showed mortality of 70% of individuals of R. indica, and the LC50 was 6.58%. It was concluded that the soursop seed extract showed acaricidal potential on R. indica in the laboratory.
基金supported by the São Paulo Research Foundation-FAPESP(Grant#2017/05866-7).
文摘The fungus Colletotrichum gloeosporioides,which is the causal agent of anthracnose disease in green-skinned avocados,is responsible for significant postharvest fruit losses.In this context,strategies should be considered to avoid this problem.The use of essential oil(EO)can represent an alternative to contribute to antifungal activity,avoiding the use of chemical products,as their indiscriminate use can have harmful effects on human health.It is known that essential oil(EO)may exhibit antifungal activity and can be used as an alternative to chemical products.Therefore,the potential of using Lippia sidoides EO to control this fungus was investigated through in vitro evaluation(MIC and EC_(50))on C.gloeosporioides isolated from avocados.Furthermore,the potential of incorporating this oil with carboxymethylcellulose(CMC)for postharvest treatment in avocados was assessed in vivo to control anthracnose and maintain their physicochemical and sensory quality.The EO from L.sidoides demonstrated a MIC of 125μl L^(−1) and an EC_(50) of 46.83μl L^(−1) against this pathogen.The results indicated that the CMC edible coating associated with L.sidoides EO exhibited a positive effect on fruit quality during cold storage.In terms of sensory aspects,avocados treated with L.sidoides EO associated with CMC showed improved appearance compared to the control treatment.These findings suggest that L.sidoides EO has potential in the postharvest treatment of avocados.Additionally,these results are significant and unprecedented for this crop,as research on the postharvest effects of incorporating this EO with edible coatings in avocados is still limited.
文摘Phar.Eur.Herbal Drug(HD)monographs state which aspects have to be considered for quality assurance through the relevant chapters'Definition'.'Characters','Identification','Tests',and'Assay'.Identification of botanical material is achieved by macroscopic and microscopic morphology,generally examined by a trained expert.Content or assay is the most difficult area of
