Vertical profiles of spore concentrations within and above a sugarcane crop

  • C Subba Reddi
  • V Ramakrishna
  • T Sreeramulu


Spore concentration profiles along a vertical line passing through and above a growing sugarcane crop were studied using a suction-line apparatus. Two tests were conducted at monthly intervals for about 8 months with a uniform set-up consisting of six miniature suction traps located at 4 ft apart from ground to 20 ft. The seasonal changes in the vertical profiles of smut spores, conidia ofCladosporium, Nigrospora, Lacellinopsis and total airspora are presented graphically on a log-log scale. Spore concentrations are always found to be greater within the crop than above and the variations in the shapes of profiles at any time in a day or in the season appear to be closely related to source height, crop height, availability of suitable substrate and the prevailing weather. The effects of abnormal weather conditions and the agronomic practices on spore profiles are also presented.


Aerobiology airspora spore dissemination sugarcane 


  1. Gadre K M 1951 Micro-climatic survey of sugarcane field;Indian J. Met. Geophys. 2 142–150Google Scholar
  2. Gregory P H 1954 The construction and use of a portable volumetric spore trap;Trans. Br. Mycol. Soc. 37 390–404Google Scholar
  3. Gregory P H 1961The microbiology of the atmosphere (London: Leonard Hill) Ch 9 and 10Google Scholar
  4. Gregory P H, Longhurst T J and Sreeramulu T 1961 Dispersion and deposition of air-borneLycopodium andGanoderma spores;Ann. Appl. Biol. 49 645–658CrossRefGoogle Scholar
  5. Last F T 1955 The spore content of air within and above mildew-infected cereal crops;Trans. Br. Mycol. Soc. 38 453–464CrossRefGoogle Scholar
  6. Ramdas L A 1960Crops and weather in India (New Delhi: Indian Council of Agricultural Research) pp. 75–76Google Scholar
  7. Sreeramulu T and Ramalingam A 1965 Vertical gradients in air-borne spores three metres above ground level; Proc. Combined 51st and 52nd Indian Sci. Congr. Delhi. pt. III. Bot. Abst. No. 62 p. 324Google Scholar

Copyright information

© Indian Academy of Sciences 1978

Authors and Affiliations

  • C Subba Reddi
    • 1
  • V Ramakrishna
    • 1
  • T Sreeramulu
    • 1
  1. 1.Department of BotanyAndhra UniversityWaltair

Personalised recommendations