生物科學(xué)外文翻譯---殺菌劑-文庫吧資料
2024-09-19 11:33本頁面
【正文】 fungicide, applied to a large number of crops (Tomlin,1994). The fungicide was applied at 100% purity and at three different concentrations: mM(carb 1), mM (carb 2), and mM (carb 3). The control treatment consisted of not applying carbendazim. Taking into account all of the parameters analyzed in this experiment, these researchers found that, in relation to control, the different treatments with carbendazim caused generally similar effects. The application of the dosage lower than remended ( raM)resulted in greater dry weight as well as in greater nitrogen (N) and potassium (K) concentrations than in control. This reflects the beneficial effect that the foliar application ofcarbendazim can exert on the accumulation of these essential nutrients, as well as on the growth and development of tobacco plants. The application of the remended dosage of carbendazim () slightly reduced values, with respect to the lesser dosage, for the dry weight, nutritional levels, all foliar pigments, P, Ca, and magnesium (Mg). These results reflect a harmful, though not severe, effect of carbendazim on the nutritional staus, pigment biosynthesis, and biomass. Therefore, the results, in revealing slight phytotoxicity, only partially support the remendation of the use of this product. Finally, these authors found that the application of the dosage heavier than remended ( mM) significantly reduced dry weight, all foliar pigments, and nutrients with respect to the other dosages and control. These data clearly show that this fungicide, applied in excess, is toxic for healthy tobacco plants. Additionally, symptoms of necrosis were found in old leaves after the application of increasing dosages of the fungicide. In short, the experimental results imply that the negative effects of carbendazim can be avoided by lowering the levels normally applied in agriculture. Nevertheless, the possibility remains that this reduction in the application rate will result in lower effectiveness against pathogens, although this problem requires further investigation. 。 Nemestothy amp。s defense systems may b
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