Overall, this work identifies key points to be taken into account when drawing up guidelines that govern the use ofÂ herbicide-tolerant (HT) crops in order to preserve the effectiveness of this innovation over time. This multidisciplinary expert report, based on an international literature review, assesses the effects of the cultivation of crops possessing HT traits. Â HT crops may appear to be useful complementary tools when farmers are facing certain difficult weed-management situations or in the context of a diversification of weed-control strategies. Their repeated use, however, can rapidly induce changes in the weed flora that can constitute more complex challenges in terms of weed control. Issues coming up with the development of agricultural production systems including HT crops are the objects of this expert report: what are the perceptions of these varieties by society and the reasons for their adoption by farmers? Are the savings on herbicides promoted by seed companies long-lasting? Can the cultivation of HT crops impact biodiversity?Â
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 edition. Excerpt: ... chapter xx History of the Chrysanthemum The early history of the Chrysanthemum collected and compiled by Professor F. W. Burbidge of Dublin, is recognized as the most concise and correct treatise on the subject known. From this work the following is condensed: Of all flowers, that which has been said to represent "cheerfulness under adversity"--the Chrysanthemum, or "Golden Flower" of the Greek--may fairly be called the "Queen of Autumn." Six varieties were described by Breynius as being cultivated in Holland two centuries ago. Originally introduced to England from the Celestial Empire in 1754, it seems first to have been cultivated by that celebrated gardener, Miller of Chelsea, but was soon afterward lost by some unfortunate accident. Again introduced, this time by way of Marseilles in 1789, it reached London in 1795, and in.Curtis's "Botanical Magazine" for 1796 we find a colored figure of Chrysanthemum Sinense (there described under the name C. Indicum), the result of the second advent. Phillips, in his "Flora Historica," published in 1824, tells us that the new plant was sold at a high price soon after its introduction, but it was not until the beginning of the nineteenth century that it attracted attention as a florist's flower. "Then," says he, "like the Eoses of China, Chrysanthemums soon escaped from the conservatories of the curious, and as rapidly spread themselves over every part of the island, filling the windows of the cottagers and the parterres of the opulent with their autumnal beauties, that now vie with the China Aster in variety of color glory." Among other peculiar modes of culture resorted to by Chinese gardeners in Chrysanthemum culture is the engrafting of cuttings on to a strong-growing species of Artemisia (A....