Summary
The time interval between the various stages commencing with the appearance of flag-leaf of the boot to complete anthesis of panicle inD. annulatum, D. caricosum andB. intermedia was studied. Detailed study of blooming of florets and dehiscence of anthers ofD. annulatum was also carried out.
InD. annulatum andD. caricosum a period of two days elapses between complete emergence of panicles out of the boots and the commencement of anthesis thus allowing sufficient time to self and treat number of panicles at a time. InB. intermedia anthesis and dehiscence take place as the panicles emerge out of the boots and thus it is necessary to bag or treat the panicles immediately three or four days after the appearance of flag-leaf.
A period of 11 days inD. annulatum andD. caricosum and 9 days inB. intermedia is required from the appearance of flag leaf to completion of anthesis.
InD. annulatum anthesis and dehiscence take place as a rule, during night and early morning between 9p.m. and 4a.m.
InB. intermedia anthesis of florets and emergence of the panicles out of the boots take place simultaneously bit by bit and takes about 4 days for completion of these two processes. Blooming and dehiscence, however, take place during night and early morning as inD. annulatum.
D. annulatum, D. caricosum andB. intermedia appear to behave as self-pollinated grass species.
Laboratory experiments showed thatD. caricosum blooms and dehisces during night and early morning at about the same time asD. annulatum.
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Communicated by Prof. L. S. S. Kumar,f.a.sc.
The author is greatly indebted to Professor L. S. S. Kumar,m.sc. (Lond.),f.a.sc., Economic Botanist and Principal, College of Agriculture, Poona, for his guidance and encouragement during the course of this work.
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Oke, J.G. Flowering habits ofDichanthium annulatum, Stapf.,Dichanthium caricosum, A. Camus andBothriochloa intermedia (Br.) A. Camus. Proc. Indian Acad. Sci. 34, 165–171 (1951). https://doi.org/10.1007/BF03051459
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DOI: https://doi.org/10.1007/BF03051459