Response of spearmint (Mentha Viridis l.) and geranium (Pelargonium graveolens l herit, ait) plants to different weed control practices [electronic resource]

Includes bibliographic reference

Four field experiments were conducted at the experimental farm of Medicinal and Aromatic
Plants Research Department, El-kanater El-khairia Qalubia Govemorate and Horticulture Res.
Institute, Agric., Res., Center, Giza, Egypt, during two successive seasons (2014-2015 and 2015-2016)
including two studies on controlling weeds in spearmint and geranium plants. The objective of this
work was to determine the efficacy of some weed control treatments (herbicides and physical
methods) on weed control and yield productivity and quality of spearmint (Mentha viridis L.) and
geranium (Pelargonium graveolens L. Herit Ait.) plants. The first study aimed to determine the effect
of six weed control treatments (Anmex, 2.5 L/fed. stomp, 1.7 L/Fed. Roal, 750 cm3/Fed. ,Select super,
0.5 L/Fed., hand hoeing and control treatment (untrested) on weeds and spearmint yield's components
(herb fresh and oil).
The results showed that the density of broad weeds in the standard treatment was estimated as
0.97 & 0.45 Ton/Fed. while the annual density of weeds was 0.43 & 0.24 Ton/Fed. in the two seasons
of 2014 & 2015 respectively , the best treatments for weed control were under the conditions of the
experiment, the Stomp extra with a rate of 1.7 L/Fed. where the least dry weight was given to broad
grass and narrow leaves , all with an increase in vegetative growth (plant high - number. of branches-
fresh weight and the oil yield of spearmint plant), also the treatment resulted from a Roal of 750
cm3 /Fed. gave the highest percentage in the compound Carvone in spearmint oil . In the second study
six weed control treatments were conducted in the Geranium yield: Stomp extra with a rate 1.7 L/Fed.
, Roal at 750 cm3/Fed. and Select super at 0.5 L/Fed. coverage with black plastic , three times hand
hoeing and control treatment (untreated treatment) to study their effected on weeds and vegetative
growth (plant height - number of branches - fresh weight and percentage of volatile oil components)
.The results indicted that the density of broad weeds in the standard treatment was estimated at 0.75 &
0.70 Ton/Fed., while the annual density of weeds was 0.43 & 0.3 Ton/Fed. for the two seasons
2014/2015 and 2015/2016 respectively and the addition of Stomp extra by 1.7 L/Fed. casued
reduction in the dry weight of the annual grass and the highest values in the vegetative growth and oil
yield, while the treatment with a Roal of 750 cm3/Fed. was the highest percentage in the compound
Geraniol the main compound of the oil of Geranium. By analyzing the Spearmint and Geranium plants
there was no residual effect of herbicides under the two studies . The economic analysis indicated that
the economic feasibility of these treatments in terms of expected returns and farmers revenue by the
Egyptian pounds.From the results it could be concluded that by using Stomp extra at 1.7 L/Fed. in
controlling the annual weeds in Spearmint and Geranium plants , it gave the highest value in oil yield
and vegetative growth and no residues were detected in fresh herbs of Spearmint and Geranium and
also mulching with black plastic sheets as a natural substitutes for weed control instead of the
herbicides.

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