Succession of Vegetation after Suppression of Parthenium Weed byZygogramma bicoloratain Bangalore, India
作者:
K.P. Jayanth,
P.N. Ganga Visalakshy,
期刊:
Biological Agriculture & Horticulture
(Taylor Available online 1996)
卷期:
Volume 12,
issue 4
页码: 303-309
ISSN:0144-8765
年代: 1996
DOI:10.1080/01448765.1996.9754753
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The introduced Mexican beetle,Zygogramma bicolorataPallister (Chrysomelidae), has brought about large scale defoliation of the noxious weedParthenium hysterophorusL. (Asteraceae) in Bangalore and surrounding areas. Studies carried out over a period of two years in two uncultivated parthenium infested horticultural fields showed that defoliation by the beetle can cause up to 99.5% decline in weed density, provided the soil is left undisturbed. Forty different species of plants, formerly suppressed by the weed, were noticed to grow in the areas vacated by parthenium. The studies also indicated that the rate of decline of parthenium and the degree of diversity of succeeding plant species in fallow lands, after defoliation by Z.bicolorata, may vary depending on the duration of weed occupation and the history of land utilisation.
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