Abstract:This study aimed to evaluate the action of hydrolats and extracts of medicinal plants and herbs on the quality of castor bean seeds stored in uncontrolled conditions. The seeds used in the experiment were packed in cotton bags and stored for 12 months. During storage was carried sanity test, "Blotter test" to determine the sanitary quality of castor beans seeds. After storage, the seeds were treated with fungicide, hydrolats, and extract of medicinal plants and herbs. After that, we proceeded the sanity test a… Show more
“…Thus, it is noted that studies focusing on the influence of plant extracts and their concentrations on germination and morphological characteristics, are extremely necessary to verify their possible use. Some substances from plant extracts can be toxic at high concentrations and beneficial or stimulants at low concentrations and may also be influenced by the part of the plant used in the preparation of the extract [32,33,34].…”
This study aimed to determine the main pathogens present in Senegalia polliphyla (DC.) seeds and to evaluate the fungicidal potential of Metrodorea flavida (K. Krause) extracts. For this purpose, concentrations of 0.5, 1.0, 1.5 and 2.0% of the extract of Metrodorea flavida leaves were used, in an ethanolic or aqueous form. The experiment was carried out using the Blottertest method to assess the incidence of pathogens in seeds and after application of treatments. Thus, the effect of extracts on the incidence of pathogens and the effects of the extracts on the germination and morphological characteristics of the seedlings was analyzed. The main pathogens found in Senegalia polliphyla seeds were Aspergillus flavus and Fusarium oxysporum. The aqueous and ethanolic extracts reduced the infestation of pathogens associated with Senegalia polliphyla seeds, as well as the main fungus found: Aspergillus flavus Link. It was also found that the extracts did not influence the germination and morphological characteristics of Senegalia polliphyla seedlings in all concentrations evaluated, thus being a promising alternative for pathogen control in forest seeds.
“…Thus, it is noted that studies focusing on the influence of plant extracts and their concentrations on germination and morphological characteristics, are extremely necessary to verify their possible use. Some substances from plant extracts can be toxic at high concentrations and beneficial or stimulants at low concentrations and may also be influenced by the part of the plant used in the preparation of the extract [32,33,34].…”
This study aimed to determine the main pathogens present in Senegalia polliphyla (DC.) seeds and to evaluate the fungicidal potential of Metrodorea flavida (K. Krause) extracts. For this purpose, concentrations of 0.5, 1.0, 1.5 and 2.0% of the extract of Metrodorea flavida leaves were used, in an ethanolic or aqueous form. The experiment was carried out using the Blottertest method to assess the incidence of pathogens in seeds and after application of treatments. Thus, the effect of extracts on the incidence of pathogens and the effects of the extracts on the germination and morphological characteristics of the seedlings was analyzed. The main pathogens found in Senegalia polliphyla seeds were Aspergillus flavus and Fusarium oxysporum. The aqueous and ethanolic extracts reduced the infestation of pathogens associated with Senegalia polliphyla seeds, as well as the main fungus found: Aspergillus flavus Link. It was also found that the extracts did not influence the germination and morphological characteristics of Senegalia polliphyla seedlings in all concentrations evaluated, thus being a promising alternative for pathogen control in forest seeds.
“…Hydrolats, commonly known as flower water, is a by-product of obtaining essential oils by hydrodistillation, currently used in different industries such as food and cosmetics for their organoleptic and biological properties. The hydrolats of different plant species have been shown to have biological activity and are also used in agriculture against different pests such as fungi and insects and also for soil fertilization [ 51 , 52 , 53 ]. In general, there are not many studies that evaluate the role of the volatile compounds of hydrolats as potential acaricides.…”
Varroa destructor is a parasitic mite, which is considered a severe pest for honey bees causing serious losses to beekeeping. Residual hydrolats from steam extraction of hop essential oils, generally considered as a waste product, were tested for their potential use as acaricides on V. destructor. Four hop varieties, namely Cascade, Spalt, Victoria, and Mapuche, showed an interesting performance as feasible products to be used in the beekeeping industry. Some volatile oxidized terpenoids were found in the hydrolats, mainly β-caryophyllene oxide, β-linalool, and isogeraniol. These compounds, together with the presence of polyphenols, flavonoids, and saponins, were probably responsible for the promissory LC50 values obtained for mites after hydrolat exposition. Victoria hydrolat was the most toxic for mites (LC50: 16.1 µL/mL), followed by Mapuche (LC50 value equal to 30.1 µL/mL), Spalt (LC50 value equal to 114.3 µL/mL), and finally Cascade (LC50: 117.9 µL/mL). Likewise, Spalt had the highest larval survival, followed by Victoria and Mapuche. Cascade was the variety with the highest larval mortality. In addition, none of the extracts showed mortality higher than 20% in adult bees. The Victoria hydrolat presented the best results, which makes it a good compound with the prospect of an acaricide treatment against V. destructor.
The objective of this work was to investigate the efficiency of the accelerated aging and controlled deterioration tests in the evaluation of lentil seeds' vigor. Water content was determined and the physiological quality was evaluated using germination and vigor tests (first count, seedling emergence, indices of germination speed and emergence, accelerated aging test with traditional method and with NaCl saturated solution at 41ºC and 45ºC for 24, 48, 72 hours and controlled deterioration with 20% and 24% water content for 24, 48 and 72 hours at 45ºC) in seven lots of lentil seeds cv Silvina. The use of traditional accelerated aging test and the NaCl saturated solution method at 41ºC for 48 hours were efficient to classify lentil seeds' lots. The combination of 20% and 24% water for 48 hours exposure and of 20% water for 72 hours exposure were efficient to classify the lentil seed lots by the controlled deterioration test.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.