摘要:

AbstractThe effects of the systemic fungicide tridemorph on fungal and plant protoplasts have been investigated. No evidence of reaction at the plasma‐membrane was revealed by microelectrophoresis. The fungicide did not affect oxygen uptake by fungal protoplasts but incorporation of labelled histidine was reduced. Fungi‐toxicity tests showed that tridemorph had little effect on spore germination but inhibited mycelial growth. It is suggested that the fungicide may act by interfering with the synthesis of proteins essential for hyphal extens

ISSN:0031-613X    

DOI:10.1002/ps.2780050302

出版商:John Wiley&Sons, Ltd    

年代:1974

数据来源: WILEY

摘要:

AbstractResidues of 1,2‐dibromoethane (EDB) were readily estimated in treated vegetables down to levels of 0.2 mg/kg. Clean‐up was effected by steam distillation into a toluene trap. This was followed by X‐ray fluorescence determination of the collected EDB in the toluene. Good recoveries of added EDB were obtained at 0.5, 2, 5 and 20 mg/kg in cucumbers, pumpkins and zucc

ISSN:0031-613X    

DOI:10.1002/ps.2780050303

出版商:John Wiley&Sons, Ltd    

年代:1974

数据来源: WILEY

摘要:

AbstractMethomyl added to rape seeds, oils or meals was detected by a thin‐layer chromatographic‐enzyme inhibition technique. The limit of detection in the presence of oil or meal extractive was 20 mg or 0.01 mg/kg. The amounts of methomyl recovered from oils and meals fortified at 0.01 to 20 mg/kg were comparable to the standard. When stored at 4 °C, methomyl in oil or meals, or in chloroform extracts, was stable for at least 10 and 21 days, respectively. No degradation was observed when methomyl was heated in ethanol at 72 °C for 2 h.Methomyl and its oxime were also detected with either iodo‐ or chloroplatinate reagent after t.l.c. The detection limits were approximately 600 mg for methomyl and 190 for th

ISSN:0031-613X    

DOI:10.1002/ps.2780050304

出版商:John Wiley&Sons, Ltd    

年代:1974

数据来源: WILEY

摘要:

AbstractThe bioautographic method of Homans and Fuchs for detecting MBC on thin layer plates, was tested quantitatively. The sum of the vertical and horizontal diameters of the zones of inhibition ofPenicillium expansum, and the square root of the mass of an equal area of paper, were directly proportional to the logarithm of the concentration of MBC. Methanol and ethanol extracted significantly more MBC from tobacco tissue than acetone and chloroform. Soxhlet extraction was more effective than cold (22 °C) treatment, but the latter, in which 100 mg aliquots of dried tissue were used, was the least variable, very much quicker and could be used to detect the fungicide in small amounts of individual plant tissues

ISSN:0031-613X    

DOI:10.1002/ps.2780050305

出版商:John Wiley&Sons, Ltd    

年代:1974

数据来源: WILEY

摘要:

AbstractThe following gas mask canister carbon fillings were evaluated in laboratory and man tests against phosphine which is finding favour as a fumigant for food stuffs: activated carbons impregnated with (1) copper sulphate, (2) potassium dichromate and silver chromate, (3) copper carbonate, potassium chromate and silver chromate and (4) potassium permanganate.Impregnation with copper sulphate (12% w/w) proved to be effective and economical. A cumulative service time of 5.2 mg h/litre was obtained in the laboratory tests at 1.7 mg/litre phosphine in air and 3.1 mg h/litre at 0.2‐1.5 mg/litre phosphine in the man test

ISSN:0031-613X    

DOI:10.1002/ps.2780050306

出版商:John Wiley&Sons, Ltd    

年代:1974

数据来源: WILEY

摘要:

AbstractA rapid method for the determination of atrazine (2‐chloro‐6‐ethy!amino‐4‐isopropylamino‐l,3,5‐triazine) residues in soil is presented. The method, which is particularly suited to laboratory studies of leaching or degradation, has the advantage of rapid throughput as it requires no clean‐up steps. Interference by different soil types, however, prevents its use in normal soil

ISSN:0031-613X    

DOI:10.1002/ps.2780050307

出版商:John Wiley&Sons, Ltd    

年代:1974

数据来源: WILEY

摘要:

AbstractTwenty‐one l,5‐diaryl‐δ2‐l,2,3‐triazolines were screened for the first time for pesticidal properties—insecticidal, fungicidal, bactericidal and virucidal. Five of the compounds showed some fungicidal activity, and 13 exhibited low level insecticidal activity, mostly toward the Mexican

ISSN:0031-613X    

DOI:10.1002/ps.2780050308

出版商:John Wiley&Sons, Ltd    

年代:1974

数据来源: WILEY

摘要:

AbstractMethyl bromide was applied with and without polyethylene covers at rates of 337, 449, 673 and 898 kg/ha to replant vineyard soils to control plant parasitic nematodes. Distribution of the gas in the soil atmosphere at different depths was measured by gas chromatography. Higher doses, low soil moisture and deeper placement of methyl bromide resulted in more rapid soil penetration and higher concentrations of the gas at the deeper soil levels. Placement of methyl bromide in the soil at 0.76‐0.81 m without polyethylene cover resulted in gas distribution at concentrations sufficient for nematode kill as deep as 2.44

ISSN:0031-613X    

DOI:10.1002/ps.2780050309

出版商:John Wiley&Sons, Ltd    

年代:1974

数据来源: WILEY

摘要:

AbstractTreatment of malaoxon with the anhydrous chlorides of zinc (II), manganese (II) copper (II) and iron (III) in carbon tetrachloride below 10° yielded solid compounds corresponding to a (1:1) composition. The infrared spectra of these compounds show coordination through the P = O bond

ISSN:0031-613X    

DOI:10.1002/ps.2780050310

出版商:John Wiley&Sons, Ltd    

年代:1974

数据来源: WILEY

摘要:

AbstractThe effects of feeding a diet containing gamma‐BHC at a level of 200 mg/kg on various aspects of egg production and egg shell quality of the Japanese quail were studied. No adverse effects were observed on rate or pattern of egg production, egg size, shell thickness, calcium content, shearing strength or structure as seen through the scanning electron microscop

ISSN:0031-613X    

DOI:10.1002/ps.2780050311

出版商:John Wiley&Sons, Ltd    

年代:1974

数据来源: WILEY