coleus vs. mildew

1. Antifungal Activity Assessment of Coleus
scutellaroides leaves Ethanolic Extract against
Erysiphe cichoracearum (powdery mildew) in
ornamental plants through SADs (Standard Area
Diagrams)
A Research made by the Agriculture Group
( Siesta Sand, n.d ) ( Garden Design, n.d )

2. This study aims to determine if the leaves of Coleus plants
can be a potent and sustainable alternative to chemical
fungicides against powdery mildew.
This study also aims to determine at what concentration
and frequency of Coleus ethanolic extract is effective as a
fungicide.
Objectives of the Study

3. The purpose of the study is to determine the effectiveness of
the extract in inhibiting the growth and development of
powdery mildew on ornamental plants, as well as to
establish the optimal concentration of the extract for this
purpose. The results of the study will provide valuable
insights into the potential use of Coleus scutellaroides
leaves ethanolic extract as a natural and eco-friendly
alternative to synthetic fungicides for controlling powdery
mildew in ornamental plants.
Objectives of the Study

4. the Philippine Ornamental Plant Industry is rising at a
'fast rate'
this is due to increased purchasing power of the
population and the growing demand which started
during the pandemic
many farms have been converted to agrotourism sites
there is a growing demand for vegetable seedlings
and ornamental plants for this areas
According to the International Association of Horticultural
Producers:
1.
2.
The government strongly supports agrotourism:
1.
2.
(The ornamentals industry in the Philippines is
flourishing, 2022)
Background of the Study
( extensionAUS, n.d )

5. However, it is faced with challenges. One of which is
lack of reliable supply since growers encounter
problems that affect the quality of the plants due to
diseases.
There is a need for a sustainable treatment for these
diseases.
According to GW research, the Philippine flower and
ornamental plants market size is expected to grow during
2022-2028.
1.
2.
( 6Wresearch, 2022)
Background of the Study
( UC ANR, n.d )

6. Powdery mildew is a common problem among
vegetable crops and ornamental plants in our
region. It is an obligate parasite growing
principally on the foliage of plants.
(Matea et al.,1980)
This leads to significant damage resulting to
reduction in yield especially when all the leaves
are covered with mildew colonies.
(Quebral et al.,1977)
Introduction
( Front Poarch News, 2020 )

7. In a study on the effect of powdery mildew on interleaf
microbial communities, it is noted that this common fungal
disease seriously jeopardizes the value of numerous species
of crops. (Xinbo Ma et al.,2023)
It is documented that it is a factor limiting maize production
extensively in Taiwan, Indonesia, Thailand and the
Philippines as well. (Exconde, n. d)
Introduction

8. In the journal article entitled Field
Evaluation of different Fungicides
against Powdery mildew, six
fungicides were tested against it.
(Guerrero et al.,1994)
3 were ineffective
2 were moderately effective
1 was effective - Sulfur
Introduction

9. Although effective against powdery mildew,
Sulfur as pesticide can also kill insects that are beneficial
pollinators
Sulfur increases the soil’s acidity which is problematic for other
plants
Even though Sulfur has low toxicity to humans, it can irritate the skin
and eyes and can lead to bronchial constriction if the spray is
inhaled.
Sulfur must never be burned. Gas with Sulfur (Sulfur dioxide) can
mix with moisture on plants to form an acid that can damage plant
leaves.
-( National Pesticide Information Center, n.d )
Introduction

10. Powdery mildew infestation of crops and ornamental
plants is a prevalent problem in our province and
significantly affects the livelihood of local farmers by
decreasing their yield or produce.
This study is being conducted because:
1.
2. As of the moment, there is no available safe, organic
and cheap treatment for this problem in the market.
Rationale

11. 3. An effective treatment can translate into more financial
returns for our local farmers and thus, a better economy since a
big percentage of our nation’s income comes from agriculture.
4. There are no studies on fungicide plants used as treatment
against powdery mildew only studies on their effectiveness on
human fungal infection.
5.Powdery Mildew has been found to be resistant to some
fungicides, thus a need to explore other alternative treatments
Rationale

12. Exconde, O. R. ( n.d ).Chemical Control of Maize Downy Mildew. JIRCAS.
jircas.go.jp/sites/default/files/publication/tars/tars8-_157-163.pdf
Gent, D. H., James, D. G., Wright, L. C., Brooks, D. J., Barbour, J. D., Dreves, A. J., Fisher, G. C., &
Walton, V. M. (2009). Effects of powdery mildew fungicide programs on twospotted spider mite
(Acari: Tetranychidae), hop aphid (Hemiptera: Aphididae), and their natural enemies in hop yards.
Journal of economic entomology, 102(1), 274–286. https://doi.org/10.1603/029.102.0137
Guerro, M. A. & Martes, N. ( 1994 ). Field Evaluation of Different fungicides against powdery mildew
Ma, X., Wang, Z., Liu, R., & Jiang, Y. ( 2023, February 1 ). Effect of powdery mildew on interleaf
microbial communities and leaf antioxidant enzyme systems. Journal of Forestry Research.
https://doi.org/10.1007/s11676-023-01597-3
( Di'dium tangitanium ) of citrus. AGRIS. agris.fao.org/agris-search/search.do? record ID=PH199801077
SOURCES/REFERENCES:

13. Nadayao, M.M. ( 1980 ). Studies on powdery mildew of tomato in the Philippines. DOST SCINET-PHIL.
http://scinet.science.ph/union/ShowSearchResult.php?
s=2&f=&p=&x=&page=&sid=1&id=Studies+on+powdery+mildew+of+tomato+in+the+Philippines&Mtype=T
HESES
Omer, M. A., Locke, J. C., & Krause, C. R. (2005 ).ARS Research on Powdery Mildew of Greenhouse Crops.
USDA. ars.usda.gov/ARSUserFiles/50820500/Publications/Omer187468_2005_PM.pdf
Peronsclerospora philippinesis. ( n.d. ). Wikipedia. en.wikipedia.org/wiki/Peronsclerospora_philippinesis
Powdery Mildew on vegetables. ( n.d ). UCIPM. impm.ucanr.edu/PMG/PESTNOTES/pn7406.html
Quebral, F.C. (1978). Powdery Mildew and Cercospora leaf spot of mungbean in the Philippines. World
Vegetable Center. Worldveg.tindi.io/record/8215?In=en
SOURCES/REFERENCES:

14. 6Wresearch. ( 2022, December ). Philippines Flower And Ornamental Plants Market (2022-2028) | Outlook, Forecast,
Analysis,Revenue, Growth, Industry, Size, Share, Trends, Value, Segmentation & COVID-19
IMPACT.https://www.6wresearch.com/industry-report/philippines-flower-and-ornamental-plants-market-2020-2026
The ornamentals industry in the Philippines is flourishing. ( 2022, May 19 ). floral daily.
Zhang, S., Mersha, Z., Vallad, G. E., & Huang, C. H. (2016). Management of Powdery Mildew in Squash by Plant and Alga
Extract Biopesticides. The plant pathology journal, 32(6), 528–536. https://doi.org/10.5423/PPJ.OA.05.2016.0131
https://www.floraldaily.com/article/9425507/the-ornamentals-industry-in-the-philippines-is-flourishing/
SOURCES/REFERENCES:

15. Thank for listening!
Have a leaf of faith!
(Dreamstine, n.d )