Benzimidazole Enhancement of Ion Uptake by Plant Roots     

Klingensmith MJ  Norman AG 《Science (New York, N.Y.)》1960,131(3397):354-355

Excised barley roots in the presence of benzimidazole accumulate about twice as much potassium in 6 hours as those in a potassium source only. The enhanced rate of uptake is maintained steadily during this time. Sodium and calcium accumulation are similarly augmented but not at identical levels.  相似文献   

Effect of spraying techniques on the brown rot of peach fruit,and on black spot,powdery mildew and the two-spotted mite of apple trees     

James H. Whan  Ian R. Smith  Norman G. Morgan 《Pest management science》1983,14(6):609-614

Application by hand-held equipment of the commercially recommended doses of proprietary formulations of captan (9.0 g a. i. per tree), mancozeb (10.8 g a. i. per tree), oxythioquinox (1.1 g a. i. per tree), and cyhexatin (1.8 g a. i. per tree), in spray volumes ranging from 0.225 to 9.0 litres per tree, gave commercial control of the brown rot of peach fruit, and of black spot (apple scab), powdery mildew and the two-spotted mite (Tetranychus urticae) of apple trees. Commercial control was also obtained using a quarter of the recommended doses when applied in 0.225 or 2.25 litres per tree. The residue of oxythioquinox on the leaves, immediately after applying 1.1 g a. i. per tree, doubled as the volume of spray was reduced from 9.0 to 2.25 litres per tree, and increased further when the volume was reduced to 0.225 litres per tree. It is suggested that some of the oxythioquinox ran off the trees at the higher volumes, and that less run-off at lower volumes resulted in higher chemical residues.  相似文献   

N and P Fertilizer Use in Soybean/Maize Mixture     

U. R. Pal    B. A. Kalu    J. C. Norman  D. K. Adedzwa 《Journal of Agronomy and Crop Science》1988,160(2):132-140

Field experiments were conducted to investigate into the N and P fertilizer use in soybean/maize mixture during the wet seasons of 1985 and 1986 at Yandev Agricultural Experiment Station. Soybean/maize mixtures with 2/3 of the respective plant population of both crops in pure stands were raised at factorial combinations of four rates of N, 0, 40, 80, and 120 kg N/ha and four rates of P, 0, 13.2, 26.4 and 39.6 kg P/ha in a randomized complete block design with three replications.
The grain yield of maize cv. TZB (a pure line variety) in mixture and land equivalent ratio (LER) increased linearly up to 120 kg N/ha in 1985 as against significant increase in the grain yield of maize cv. 8322–3 (a hybrid variety) and LER up to 40 kg N/ha only in 1986 primarily due to greater fertilizer N recovery by the latter. Significant enhancement in LER was also recorded up to 26.4 kg P/ha in both years. The yield of soybean in mixture remained unaffected by N or P rates.
Total N uptake by shoots of soybean/maize mixture was significantly and linearly increased up to the application of 120 kg N/ha in 1985 as against significant increase in total N uptake by soybean/maize mixture only up to 40 kg N/ha in 1986 owing to the greater fertilizer N recovery by maize (69%) in the latter than the one (29.75—31.75%) in the former. Total N uptake by shoots of soybean/maize was also increased significantly due to the application of 26.4 kg P/ha.
Application of N and P also significantly enhanced P uptake by shoots of soybean/maize mixture and fertilizer P recovered by mixture was less (3.99—12.95%) in 1985 than the one (19.95—32.12%) in 1986.  相似文献   

Insecticidal activity of the pyrethrins and related compounds. Part XI. Relative potencies of isomeric cyano-substituted 3-phenoxybenzyl esters     

Michael Elliott  Andrew W. Farnham  Norman F. Janes  David M. Soderlund 《Pest management science》1978,9(2):112-116

The insecticidal activities to Musca domestica L. and Phaedon cochleariae Fab. of a series of 3-phenoxybenzyl pyrethroid esters with a cyano substituent at the 2-, 6-. (R)-α-, or (S)-α-position are compared with those of the unsubstituted analogues. Only an (S)-α-substituent enhances activity; others diminish or almost eliminate it. (RS)-α-mixtures are generally less active than would be predicted from the potencies of their separate constituents.  相似文献   

A re-evaluation of the D (+) xylose absorption test in the horse     

M C Roberts  P Norman 《Equine veterinary journal》1979,11(4):239-243

The absorption of d-xylose forms the basis of a useful screening test in the investigation of small intestinal disorders in the horse. A comparison has been made of different assay methods and there was no significant difference between the results obtained with the parabromoaniline (PBA) method or the ferric chloride-orcinol (FCO) method. The orthotoluidine method was unsatisfactory. The anticoagulant agent did not affect the test. A dose of 0.5 g commercial grade xylose/kg body weight as a 10 per cent solution given by stomach tube, produced a peak plasma xylose level after 90 min and should discriminate normal from abnormal absorption. The FCO method was preferred for the occasional test performed in practice, and a 2-hour sampling period would be adequate.  相似文献   

Pest and disease control on intensive apple trees by overhead mobile spraying     

Barry K. Cooke  Pamela J. Herrington  Kenneth G. Jones  Norman G. Morgan 《Pest management science》1975,6(6):571-579

In 3 year field experiments on pest and disease control by mobile overhead spraying of intensive Cox's Orange Pippin apple trees, overhead booms applying 1125 litres/ha and overhead mist-blowing equipment applying 562 litres/ha, each spraying two complete rows from one alley in half the normal time, were compared with conventional automatic mast spraying at 2250 litres/ha and with conventional mist-blowing at 562 litres/ha. The overhead boom application of demeton-S-methyl (0.0036% a.i.) with azinphos-methyl (0.0165% a.i.) or of fenitrothion (0.031% a.i.) at the green cluster stage gave control of the applegrass aphid, Rhopalosiphum insertum, virtually equal to that obtained by conventional application of the same insecticides. Similarly, the overhead mist applications of conventional quantities of insecticides gave equal control, but not when applying one-quarter of the normal amount of insecticides. The conventional methods generally gave better control of apple sucker, Psylla mali. In 1971, when the incidence of apple scab, Venturia inaequalis, was only moderate, the overhead boom method gave equal control to conventional spraying with both dodine/captan (0.03% a.i. and 0.094% a.i.) and benomyl (0.025% a.i.) programmes: in 1972 and 1973, when the scab incidence was heavier, the overhead boom spraying was again equal to the conventional method with the benomyl programme but was less effective with the dodine/captan programme. The overhead mist applications gave control only when the scab incidence was light. Repeated applications of dinocap emulsion (0.025% a.i.), included in the fungicide programme in 1971, gave as good control of the active stages of fruit tree red spider mite, Panonychus ulmi, when applied by the overhead methods as by conventional spraying, but application of the benomyl programme gave poor control. Mobile overhead spraying of small intensive apple trees is a promising method but needs further development before becoming fully acceptable.  相似文献   

A COMPARISON OF TWO-DIMENSIONAL ULTRASONOGRAPHY AND RADIOGRAPHY FOR THE DETECTION OF SMALL AMOUNTS OF FREE PERITONEAL FLUID IN THE DOG     

Raymond K.  Henley  DVM  David A.  Hager  DVM  Norman  Ackerman  DVM 《Veterinary radiology & ultrasound》1989,30(3):121-124

The detection of small amounts of free peritoneal fluid in the canine patient can be a diagnostic dilemma. Ultrasonography and radiography have been advocated to detect intraabdominal fluid not detectable by physical exam. The purpose of this study was to determine the more sensitive method for detecting small amounts of free peritoneal fluid. Ultrasound examinations and radiographs were performed after increments (1 ml/lb body weight) of fluid were injected intraperitoneally. Ultrasonography detected fluid in one animal at 2 ml/lb. AH other animals had fluid detected at 3 ml/lb. With radiographs fluid could be detected with a high degree of accuracy at 4 ml/lb. The lateral view was more accurate than the ventrodorsal view in detecting fluid. The authors concluded that Ultrasonography is more sensitive than radiography and is the method of choice to detect small amounts of free peritoneal fluid.  相似文献   

Patent dispute divides AIDS researchers     

C Norman 《Science (New York, N.Y.)》1985,230(4726):640-642

  相似文献   

Cat study halted amid protests     

C Norman 《Science (New York, N.Y.)》1988,242(4881):1001-1002

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Primary Ciliary Dyskinesia in the Dog   总被引：1，自引：0，他引：1  

Wallace B. Morrison DVM    Norman J. Wilsman DVM  PhD    Leslie E. Fox DVM  Cornelia E. Farnum DVM  PhD 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》1987,1(2):67-74

Electron microscopy was used to diagnose primary ciliary dyskinesia in a litter of English pointer dogs and in a golden retriever dog. A technique of membrane solubilization, fixation, and negative staining with glutaraldehyde tannic acid identified abnormally constructed central and B microtubules in respiratory cilia from dogs with primary ciliary dyskinesia. Shortened outer dynein arms commonly associated with primary ciliary dyskinesia actually represents the absence of a specific subset of the three most peripheral components of the whole outer dynein arm structure.  相似文献