THE YIELD AND QUAEITY OF RED BEET SEED AS AFFECTED BY DESICCANT SPRAYS AND HARVEST DATE     

R. B. AUSTIN  P. C. LONGDEN 《Weed Research》1968,8(4):336-345

Summary. Diquat and sodium monochloroacetate (SMA) were used to desiccate seed crops of red beet in experiments from 1963 to 1965. The seed plants became brown and dry about 7 days after spraying and were then judged suitable for combine harvesting, although this was not done in these experiments. Yields of seed 7 days after spraying were as good as those from the control plants, but were lower than the control yields when harvested 14 days after spraying. In laboratory tests in moist sand at 20° C the percentage of the embryos which germinated was not markedly affected by diquat or SMA treatment. The emergence of seedlings in the field, however, was affected adversely by treatment of the seed crop with 11 and 22 oz/ac of diquat ion in 1963 and by SMA at 20 lb/ac in 1964 and 1965. Diquat at 6·6 oz/ac in 120 gal/ac water in 1964 and 1965 had no serious adverse effects on embryo emergence. Residues of diquat ion in seed varied from 2 to 4 ppm, but the impairment of embryo emergence by diquat was believed to be due to the premature arrest of growth of the seed on the desiccated plants.
It is concluded that when harvesting conditions are poor, desiccants could be valuable.
Influence des traitements dessicants et de la date de récolte sur le rendement et la qualité de la sentence de betterave rouge  相似文献   

Cardioaccelerator release in Periplaneta americana (L)   总被引：1，自引：0，他引：1  

S B Kater 《Science (New York, N.Y.)》1968,160(829):765-767

Focal electrical stimulation of the brain of Periplaneta americana evokes the release of a factor with high cardioaccelerator activity. Results of extirpation of components of the retrocerebral complex from an isolated head preparation imply that the corpus cardiacum is the critical component of this system. The cardioaccelerator is a heat-stable proteinaceous compound.  相似文献   

Cytopathologic changes of lymphatic tissues of cattle with the bovine virus diarrhea-mucosal disease complex     

C P Peter  J R Duncan  D E Tyler  F K Ramsey 《American journal of veterinary research》1968,29(5):939-948

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Inhibition of Verticillium polygalacturonase by oxidation products of polyphenols   总被引：1，自引：0，他引：1  

S S Patil  A E Dimond 《Phytopathology》1967,57(5):492-496

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Studies on the effect of thyroid on vitamin A metabolism. II. Mechanism of decrease of vitamin A in tissues of rats treated with desiccated thyroid     

C Ushimi  N Yoshida 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1964,26(1):7-13

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Epizootiological study on epizootic-fever-like disease of cattle by means of neutralization test. 3. Neutralizing antibody response in the epizootic season in 1961     

S Yamada 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1964,26(4):231-236

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Inheritance of tolerance to halo blight in bean     

P N Patel  J C Walker 《Phytopathology》1966,56(6):681-682

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Electron microscopy of dark green spots on leaves of Nicotiana glutinosa induced by tobacco mosaic virus     

T Hayashi  C Matsui 《Phytopathology》1966,56(2):192-196

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THE USE OF HERBICIDES IN ALTERNATE HUSBANDRY AS A SUBSTITUTE FOR PLOUGHING     

R. A. ARNOTT  C. R. CLEMENT 《Weed Research》1966,6(2):142-157

Summary. It is practicable to use herbicides as an alternative to ploughing grass swards for the preparation of a seedbed for the sowing of cereals and kale. The yields of spring barley and kale following a glaass/clover sward killed with 10 lb/ac amitrole-T were similar to those obtained following ploughing. Yields of tip to 40 cwt/ac of winter wheat were obtained following grass swards killed with amitrole-T compared with up to 45 cwt/ac after ploughing.
The ideal herbicide must kill all plants in a sward and have no residual toxicity to the subsequent crop. At 10 lb/ac, amitrole-T killed most plants in the sword, but it was considered necessary to delay sowing for at least 3 weeks after spraying to minimize the danger of residual toxicity. Ploughing gave the lowest incidence of grasses persisting from the sward. Paraquat did not control clover and Agropyron repens , while broad-leaved weeds were more common on the ploughed than on the sprayed land.
There were differences in the amount of nitrogen mineralized in ploughed and In undisturbed soil, but these were insufficient to affect crop yields materially. When a lower yield followed herbicidal destruction of the sward, this was not accompanied by a reduced percentage nitrogen content.
L'emploi des déherbants pour la rénovation des prairies  相似文献   

Electromyographic study on hypertonus in the hind limbs of a dog resulting from the temporary occlusion of he thoracic aorta     

S Inada 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1964,26(4):223-230

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