References
- ALDRICH , S. R. , SCOTT , W. O. and LENG , E. R. 1978 . Modern Corn Production , 2nd edn. , Illinois, , USA : A and L Publications .
- ANONYMOUS . 1974 . “ Competition studies ” . In Annual Report 1972–73 , Rhodesia : Henderson Research Station, Manzoe .
- BELL , D. T. and KOEPPE , D. E. 1972 . Non‐competitive effects of giant foxtail on the growth of corn . Agronomy Journal , 64 : 322 – 325 .
- BRIDGEMOHAN , P. and BRATHWAITE , R. A. I. 1989 . Weed management strategies for the control of ft cochinchinensis in maize in Trinidad . Weed Research , 29 : 433 – 440 .
- BURNSIDE , O. C. and WICKS , F. A. 1967 . The effects of weed removal treatments on sorghum growth . Weeds , 15 : 204 – 207 .
- DAWSON , J. H. 1977 . Competition of late emerging weeds with sugar beets . Weed Science , 25 : 168 – 170 .
- FISHER , H. H. , LOPEZ , F. , MARGATE , L. , ELLIOT , P. and BURILL , L. 1985 . Problems in control of Rottboellia exaltata L.F. in maize in Bukidon Province, Mindanao, Philippines . Weed Research , 25 : 93 – 102 .
- FRIESEN , G. H. 1979 . Weed interference in transplanted tomatoes (Lycopersicon esculentum) . Weed Science , 27 : 11 – 13 .
- LOOMIS , R. S. , WILLIAMS , W. A. , DUNCAN , W. G. , DOVRAT , A. and NUNEZ , A. 1968 . Quantitative descriptions of foliage display and light absorption in field committees of corn plants . Crop Science , 8 : 352 – 356 .
- MADRID , M. T. , LUBIGON , R. T. and PUNZALAN , F. L. 1972 . Some Common Weeds and their Control . Weed Science Society of the Philippines ,
- McWHORTER , C. G. and ANDERSON , J. M. 1979 . Hemp sesbania competition in soyabeans (Glycine max) . Weed Science , 27 : 58 – 64 .
- MERCADO , B. L. 1976 . Some properties of the inhibitor from R. exaltata seed . Philippines Weed Science Bulletin , 31 : 40 – 45 .
- MERCADO , B. L. 1978 . Biology, problems and control of Rottboellia exaltata L.F. A monograph , Biotrop Bulletin No. 14
- NIETO , J. N. , BRONDO , M. A. and GONZALEZ , J. T. 1968 . Critical periods of the crop growth cycle for competition from weeds . Pest Articles and News Summaries. C , 14 : 159 – 166 .
- PATTERSON , D. T. and FLINT , E. P. 1979 . Effects of simulated field temperatures and chilling on itchgrass (R. exaltata) . Weed Science , 27 : 549 – 553 .
- PATTERSON , D. T. , MEYER , C. F. , FLINT , E. P. and QUINBY , P. C. Jr . 1978 . Mathematical analysis of the growth of itchgrass [R. exaltata] in 36 combination of day and night temperatures . Plant Physiology , 62 : 14 – 17 .
- ROBERTS , H. A. 1976 . Weed competition in vegetable crops . Annals of Applied Biology , 83 : 321 – 324 .
- SHARMA , D. and ZELAYA , O. 1986 . Competition and control of itchgrass (Rottboellia exaltata) in maize (Zea mays) . Tropical Pest Management , 32 : 101 – 104 .
- THOMAS , P. E. L. and ALLISON , J. C. S. 1975 . Competition between maize and R. exaltata . Journal of Agricultural Science, Cambridge , 84 : 305 – 312 .
- WEAVER , S. E. 1984 . Critical period of weed competition in three vegetable crops in relation to management practices . Weed Research , 24 : 317 – 325 .
- WEAVER , S. E. and TAN , C. S. 1987 . Critical period of interference in field‐seeded tomatoes and its relation to water stress and shading . Canadian Journal of Plant Science , 67 : 575 – 583 .
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