Studies on the biotypes of Cynodon dactylon (L.) with special reference to their response to trichloroacetic and 2,2-dichloropropionic acids
| MSI99P0005 | |
| Rochecouste, E. | |
| London, GB | |
| Studies on the biotypes of Cynodon dactylon (L.) with special reference to their response to trichloroacetic and 2,2-dichloropropionic acids | |
| Thesis, Ph.D. | |
| Thesis | |
| 1961 | |
| 67 p.: 26 tbls., 19 graphs, 24 pl. | |
| En | |
| En | |
| Studies on clones of Cynodon Dactylon (L) Pers. have revealed the existence of four biotypes of this species. The sole morphological characters to classify them was found unsatisfactory and other definite diagnostic characters have been introduced comprising hair group characteristics and leaf and stolon epidermal structures. Cytological studies showed that the biotypes differ in their chromosome number; tetraploid and triploid races have been distinguished. Phasic growth investigations have pointed out that the biotypes have a similar growth behaviour but that the tetraploids are more vigorous plants than the triploids. Studies on the seasonal variation in available carbohydrates in rhizomes and roots have established that the seasonal trend of this reserve substance in these organs is related to rhizome growth. Results obtained on the growth response of the biotypes to trichloacetic and 2,2-dichloropropionic acids indicated that the tetraploid races are more resistant that the triploid ones and that races of the same chromosome number also differ in their response to these acids. Investigations on the effects of adding nonionic, cationic and anionic wetting agents did not significantly increase the phytotoxicity of either trichloroacetic acid or 2,2-dichloropropionic acid. Studies on bud dormancy revealed that uptake of the acids via the roots is through the transpiration stream and that in tetraploids the dormant period induced by the acids is shorter that in triploids. Investigations on C. dactylon biotypes and on their response to trichloroacetic and 2,2-dichloropropionic acids have brought forward new facts in establishing that a set of factors both intrinsic and environmental are operative and have emphasized the significance of a knowledge of the biology of a plant in order to effect its control by chemicals. | |
| CYNODON DACTYLON SUGARCANE TCA DALAPON HERBICIDES HERBICIDE APPLICATION ACIDS WEEDS WEED CONTROL CHIENDENT | |
| MAURITIUS | |
| Sugarcane: weeds, weed control and management | |
| Weeds: Cynodon dactylon | |
| 584.9(69.82):632.58(69.82) | |
| 1991-10-01 | |
| En | |
| Mauritius Sugar Industry Research Institute | |
| LIB | |
| CAT | |
| 1 | |
| COWA |