Agriculture, importance

Free-living bacteria are, however, used as the source of the enzyme nitrogenase, responsible for N2 fixation (1,4,26,80), for research purposes because these ate easier to culture. The enzyme is virtually identical to that from the agriculturally important thizobia. These free-living N2-fixets can be simply classified into aerobes, anaerobes, facultative anaerobes, photosynthetic bacteria, and cyanobacteria. 

Avemiectin is the most effective of the averniectia family of natural products against agriculturally important insects and mites (14). It has been commercialized for agricultural use under the nonproprietary name abamectin. This mixture of avermectins contains at least 80% of avermectin (C4gH 20 and not more than 20% of avermectin B Abamectin for use in foHar spray appHcations is formulated as an emulsiftable... 

Of agricultural importance is the plant-growth regulating activity of 6,8-dichloro-2-methyl-3-carboxymethyl-4(3H) quinazolinone which was as potent as 2,4-dichlorophenoxyacetic acid in the Lepidium test. 4-Hydroxy-5,6,7,8-tetrahydroquinazoline has been patented with reference to fungicidal activity. 

The required number and locations of trials must first be determined, based on the quantity and source of imported commodities. Information on agricultural imports... 

In view of the great agricultural importance today of the synthetic plant growth substances in controlling the growth of plants of economic importance, details of the history of this development of investigations on plant hormones are presented. 

Miller J D, ApSimon J W, Blackwell B A K Greenhalgh R and Taylor A (2001), Deoxynivalenol a 25 year perspective on a trichothecene of agricultural importance , in Summerell B A, Leslie J F, Backhouse D, Bryden W L and Burgess L W, Fusarium Paul E. Nelson Memorial Symposium, The American Phytopathological Society Press, St. Paul, Minnesota, 310-320. 

Feeding a world population of over 6 billion requires the use of tools of all types. Not only is the machinery of agriculture important, but so are the chemicals of agriculture. The use of effective fertilizers is essential to increase food production from a tillable land mass that (at least in the United States) is shrinking. Phosphates are an important constituent in many types of fertilizers, and their production involves primarily inorganic chemistry. 

The Ebro river catchment covers 85,534 km2 and flows from an altitude of 3,404 m in the Pyrenees in Cantabria (NE Spain) southeast to the Mediterranean Sea (Fig. 1), where it has an ecologically and agriculturally important delta that covers more than 150 km2 [5]. 

Histamine also occurs naturally in plant tissues. It arises from the decomposition of histidine, but its function has not been elucidated. Histamine levels in some plants are surprisingly high - 1,340 pg/g in the blossoms of the spinach plant ( ). It is the exposure of man and animal to this botanical histamine with a possible physiological action that makes histamine of agricultural importance. The inhalation of cotton dust, for instance, has been related to byssinosis, a respiratory disease involving a lung dysfunction. 

While the F. macrophylla isobutylamides, especially pellitorine, are active against several species of pest organisms of medical and agricultural importance, their activity must be enhanced before they can be used on a commercial basis. Hopefully, the results of the present work will direct future studies leading to synthetic isobutylamides of sufficient activity to warrant their practical use in insect and snail control. 

Our studies with geraniol indicate its ability to control more than one agriculturally important pest, a weed and a pathogenic fungus. Moreover, up to... 

A number of amlnosulfenyl derivatives of methomyl have been examined for Insecticidal activity (30). In general, the derivatives were similar to methomyl in their activities against a number of agriculturally important insects. One of these compounds, U-46,855 showed greater foliar residual life, less... 

Starch is the major carbohydrate in potato and is an agriculturally important commodity with many food and non-food uses (Ellis et al., 1998). It is the basic source of energy for a majority... 

The groups are focused on major areas of fungicide chemistry that have presented themselves as real or potential resistance risks in agriculturally important crops. These are ... 

R. K. Jansson R. A. Dybas, Avermectins Biochemical Mode of Action, Biological Activity and Agricultural Importance. In Insecticides with Novel Mode of Action I. Ishaaya, D. Degheele, Eds. Springer Berlin, 1998 pp 152-170. 

Hunt, D.A. and Tracy, M.F., Pyrrole insecticides A new class of agriculturally important insecticides functioning as uncouplers of oxidative phosphorylation, in Insecticides with novel modes of action, Ishaaya, I. and Degheele, D., Eds., Berlin Spriner-Verlag, 1998, p. 138. 

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