An experiment was conducted during 2015/2016 and 2016/2017 growing seasons at the Experimental Farm of Faculty of Agriculture, Fayoum University, Fayoum. The experiment aimed to study the influence of ammonium nitrate and potassium humate on chemical composition of Calendula officinalis, L. plant under two types of soil. The laid-out in a splitsplit plot arranged in randomized complete block design with three replicates. Soil media was considered as main plot in form of two types (clay & sand loamy soils), while nitrogen fertilizer was in sub-plot in form of ammonium nitrate (33.5% N) at rate of (0, 3 and 6 g/plant) and humic acid was in sub-subplot in form of potassium humate (85%) at rate of (0, 1 and 2 g/plant). The subsub-plot was contained five pots.The obtained results showed that the interaction between (6gm/plant) ammonium nitrate and (2gm/plant) potassium humate increased N, P, K % compared with the control.Calendula plants treated with the interaction between ammonium nitrate and potassium humate increased the pigments contents such as (Beta carotene and Xanthophyll ) in dry ray flowers as compared to untreated plants.
The journal of Toxicology and pest control is one of the series issued twice by the Egyptian Academic Journal of Biological Sciences, and is devoted to publication of original papers related to the interaction between insects and their environment. The goal of the journal is to advance the scientific understanding of mechanisms of toxicity. Emphasis will be placed on toxic effects observed at relevant exposures, which have direct impact on safety evaluation and risk assessment. The journal therefore welcomes papers on biology ranging from molecular and cell biology, biochemistry and physiology to ecology and environment, also systematics, microbiology, toxicology, hydrobiology, radiobiology and biotechnology. www.eajbs.eg.net
BACKGROUND: Terrestrial snails are one of the most damaging threats to sustainable agriculture. Chemical control using molluscicides is the main approach used to combat these agricultural pests. Metaldehyde is the active ingredient in most snail control products in use. However, its toxicity indices and mode of action have scarcely been investigated. For the first time, we characterized the metaldehyde contact toxicity indices against the white garden snail Theba pisana. The biochemical impact of metaldehyde on acetylcholinesterase (AChE), aspartate aminotransferase (AST) and alanine aminotransferase (ALT), alkaline phosphatase (ALP) and glutathione S-transferase (GST) activities and the lipid peroxidation (LPO) level was investigated.
A wide variety of adjuvants surfactants are available fair therefore need to choose a suitable surfactant to give maximum system enables to choose proper surfactant with ease and enhanced the insecticide effectiveness and raises the perseverance of insecticides. This study swivel, the influence of adjuvants Triton ® X-405 (Octylphenol ethoxylate), Codacide oil), Silwet Gold ® (Trisiloxane Alkoxylates) to enhance the toxicity of (Lufenuron, Profenofos, and cypermethrin) as mercantile insecticides recommended against Egyptian cotton leafworm (CLW) Spodoptera littoralis. The results pointed out that the amalgamation of the adjuvants and halfrecommended field rate of insecticides increased the toxicity of tested insecticides and decreased the rate of field application, decreases the surface tension of spray solutions to a much lower range, high range of (HLB) hydrophile-lipophile balance. Moreover, comparing sedimentation after half an hour of mixing as well as foaming after half an hour of mixing results gives different values in Emulsion properties (foaming and Stability).
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