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Influence of alfalfa bud mite eriophyes medicaginis on growth of alfalfa medicago sativa under different temperatures



Influence of alfalfa bud mite eriophyes medicaginis on growth of alfalfa medicago sativa under different temperatures



Crop Science 20(6): 790-792



The influence of 4 temperatures (15, 20, 25 and 29.degree. C) on the growth of alfalfa (M. sativa L.) seedlings, initially infested with 10 alfalfa bud mites (E. medicaginis Keifer) per seedling, was studied. Mite infestation caused significant reductions in dry weight of leaves and stems, petiole length and leaf area of the seedlings at all temperatures. Dry weight reductions of infested seedlings were greatest at 25 and 29.degree. C. The greatest reductions in stem and petiole length and leaf area occurred at 29.degree. C. The reduction in total leaf area per plant due to mite infestation was similar at 15, 25 and 29.degree. C but there was less reduction at 20.degree. C. The influence of bud mite infestation on the growth of alfalfa seedlings was expressed mainly as a reduction of extension growth. This results in reduced leaf expansion and reduced elongation of the stem and petiole.

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Accession: 005680218

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