HIND AGRICULTURAL RESEARCH AND TRAINING INSTITUTE

INTRODUCTIONCucumber (Cucumis sativus L.) is an important

cucurbitaceous vegetable crop. It is thought to be one ofthe oldest vegetable cultivated by man with historicalrecords dating back 5,000 years. The crop is the fourthmost important vegetable after tomato, cabbage and onionin Asia, however, second Western Europe in tropicalAfrica. Cucumber (Cucumis sativus L.), is rich inphosphorus, potassium and oxalic acid and is popularlyused in salads. Its seeds are diuretic, tonic andrefrigerant. The odorous principle of Cucumis sativusL. is extractable with alcohol and is used in certain

bouquet perfumes (Pandey, 2000).Cucumber (Cucumis sativus L.) belongs to the

family Cucurbitaceae. The family has two subfamiliesand includes 118 genera and 825 species. This family isimportant for edible fruits, seeds and major food cropsare produced in the tropical, subtropical and temperateregions (Judd et al., 2008).

The original cucumber species is found wild inHimalaya in northern India. When grafting is used, it isto produce plants with roots that are resistant to somesoil-borne diseases, caused by e.g. Fusarium spp.,Verticillum spp. and Pythium spp., and to create plants

Strategy for chemical management of powdery mildew inCucumis sativus L.

M.R. DABBAS* AND SHRAWAN KUMAR

Vegetable Section, C.S.A. University of Agriculture and Technology, Kalyanpur, KANPUR (U.P.) INDIA

ABSTRACT

Cucumber (Cucumis sativus L.) is an important cucurbitaceous vegetable crop.Cucumber crop is attacked by various plant diseases, among them Powdery Mildew ofcucumber caused by Erysiphe cichoracearum is an important disease which effect alarge area of the cucumber crop. An experiment was laid down at Vegetable ResearchFarm, Kalyanpur, Kanpur for disease management by chemicals and observations ondisease intensity and yield was recorded in consecutive years (2011-12 and 2012-13). Itis evident that minimum disease intensity (6.85% and 7.35%), maximum edible fruityield of cucumber (221.36 and 216.19 q/ha) and maximum C: B ratio (1:2.90) wererecorded in treatment (T

5) three foliar sprays of Bayliton (0.2%) at 10-12 days intervals

from initiation of the disease followed by treatment (T1) three foliar sprays of Tridemorph

(calexin 0.1%), which gave (10.15 and 8.65%) disease intensity, (204.12 and 209.62q/ha)edible fruit yield and C: B ratio (1:2.45).

How to view point the article : Dabbas, M.R. and Kumar, Shrawan (2015). Strategy forchemical management of powdery mildew in Cucumis sativus L. Internat. J. Plant Protec., 8(2): 343-346.

KEY WORDS :Chemical management, Powderymildew, Cucumis sativus L., Vegetablecrop, Tridemorph

Received : 06.08.2014Revised : 30.08.2015Accepted : 15.09.2015

*Corresponding author:Email: drmrdabbas@gmail.com

ARITCLE INFO

RESEARCH PAPER DOI : 10.15740/HAS/IJPP/8.2/343-346

INTERNATIONAL JOURNAL OF PLANT PROTECTIONVOLUME 8 | ISSUE 2 | OCTOBER, 2015 | 343-346

e ISSN-0976-6855 | Visit us : www.researchjournal.co.in

IJPP

344Internat. J. Plant Protec., 8(2) Oct., 2015 :HIND AGRICULTURAL RESEARCH AND TRAINING INSTITUTE

M.R. DABBAS AND SHRAWAN KUMAR

Fig

. 1

:D

isea

se i

nte

nsi

ty a

nd

yie

ld f

or t

wo

year

s

250

200

150

100 50 0

DI

(%)

2011

-201

2

DI

(%)

2012

-201

3

Yie

ld (q

/ha)

201

1-20

12

Yie

ld (q

/ha)

201

2-20

13

Trid

emor

ph (c

alex

in 0

.1%

)

Flus

ilazo

le (C

urso

r 0.1

%)

Tebu

cona

zole

0.1

%

Sodi

um b

isul

phat

e 0.

25% Bay

liton

0.2

%

Difn

econ

azol

e 0.

05%

Wet

tabl

e su

lphe

r 3.0

%

Car

beda

zim

0.1

%

Nee

m o

il 0.

25%

Con

trol

343-346

HIND AGRICULTURAL RESEARCH AND TRAINING INSTITUTEInternat. J. Plant Protec., 8(2) Oct., 2015 :345

with more robust root systems, which results in bettervegetative growth. Seeds can be sown in differentsubstrates (Molen, 2007 and 2008). Cucumber crop isattacked by various plant diseases, among them PowderyMildew of cucumber caused by Erysiphecichoracearum is an important disease which effect alarge area of the cucumber crop. Powdery mildew canappear in most parts of the cucumber plant, but is mostcommon in young tissues on the upper surface of theleaves (Agrios, 2005). The root is not infected and fruitsare free of visible infection (Sitterly, 1978). The first signsof infection are circular white spots, appear in both theupper and lower surfaces of the leaf (Robinson andDecker- Walters, 1997).

MATERIALAND METHODSThe experiment was conducted at Vegetable

Research Farm, Chandra Shekhar Azad University ofAgriculture and Technology, Kanpur during twoconsecutive years (2011-12 and 2012-13). Theexperiment was laid out on Randomized Block Design(RBD) with three replication. The soil of experimentalplot was sandy loam in nature, well drained with lowC:N ratio. The plot size was 3 x 2 m. The recommendedagronomical practice was followed to raise the crophealthy. Foliar spray of nine fungicides viz., Tridemorph(calexin 0.1%), Flusilazole (Cursor 0.1%), Tebuconazole0.1 per cent, Sodium bisulphate 0.25 per cent, Bayliton0.2 per cent, Difneconazole 0.05 per cent, Wettablesulpher 3.0 per cent, Carbendazim 0.1 per cent and NeemOil 0.25 per cent applied for two times at 10-12 daysinterval from the initiation of the disease. A set ofunsprayed field plots served as control. Disease intensitywas recorded on the basis of percentage of infected leafarea after 10 days of last spraying. Then statisticallyanalyzed. The percentage of the disease over controlwas calculated as follows.

100xcontrolinintensityDisease

treatmentinintensityDisease-controlinintensityDiseasecontroldiseasecentPer

The yield (q/ha) of Cucumis sativus also recordedin plot and then statistically analyzed.

RESULTS ANDDISCUSSIONAn experiment was laid down at Vegetable

Research Farm, Kalyanpur, Kanpur for disease

management by chemicals and observations on diseaseintensity and yield was recorded in consecutive years(2011-12 and 2012-13). The trial comprised of ninetreatment viz., Tridemorph (calexin 0.1%), Flusilazole(Cursor 0.1%), Tebuconazole 0.1 per cent, Sodiumbisulphate 0.25 per cent, Bayliton 0.2 per cent,Difneconazole 0.05 per cent, Wettable sulpher 3.0 percent, Carbendazim 0.1 per cent, and Neem Oil 0.25 percent for foliar sprays. The average disease intensity,edible fruit yield and C:B ratio recorded weresummarized in Table 1 and Fig. 1 showed that all thetreatment tested was significantly effective in reducingPowdery mildew of cucumber percentage over control.It is evident that minimum disease intensity (6.85% and7.35%), maximum edible fruit yield of cucumber (221.36and 216.19 q/ha) and maximum C: B ratio (1:2.90) wererecorded in treatment (T

5) three foliar sprays of Bayliton

(0.2%) at 10-12 days intervals from initiation of thedisease followed by treatment (T

1) three foliar sprays of

Tridemorph (calexin 0.1%), which gave (10.15 and8.65%) disease intensity, (204.12 and 209.62q/ha) ediblefruit yield and C: B ratio (1:2.45). The similar data onchemical control of powdery mildew in cucumberreported by Katsube (2001); Khan (1999) and Chaudhryet al. (2009).

Acknowledgment :The authors are grateful to Head, Department of

Vegetable Section, Chandra Shekhar Azad Universityof Agriculture and Technology, Kanpur for providingnecessary facilities.

REFERENCESAgrios, G.N. (2005). Plant Pathology. Fifth edition.Burlington: Elsevier Academic Press.

Chaudhry, S.U., Iqbal, J. and Mustafa, A. (2009). Eficacy ofdifferent fungicides for the control of downy mildew ofcucumber. J. Animal & Plant Sci., 19(4) : 202-204.

Judd, W.S., Campbell, C.S., Kellogg, E.A., Stevens, P.F. andDonoghue, M.J. (2008) Plant Systematics – A PhylogeneticApproach 3rd Ed. Sunderland, Massachusetts: SinauerAssociates, Inc.

Katsube, K. (2001). Chemical control of downy mildew incucumber. Tohoko Nogyo kenkyu Seika Joho. pp. 183-184.

Khan A.R. (1999). Evaluation of fungicides and time ofapplication for controlling downy mildew of cucumberPakistan. J. Phytopathology (Pakistan), 11(2) : 169-172.

STRATEGY FOR CHEMICAL MANAGEMENT OF POWDERY MILDEW IN Cucumis sativus L.

343-346

346Internat. J. Plant Protec., 8(2) Oct., 2015 :HIND AGRICULTURAL RESEARCH AND TRAINING INSTITUTE

Molen, S.A. (2007 and 2008) Ekologisk odling avväxthusgurka. In: Ekologisk odlingi vaxthus. Page 1-30.

Pandey, B.P. (2000). Economic Botany, pp 76-77. S. Chand &Co. Ltd., New Delhi, INDIA.

Robinson, R.W. and Decker-Walters, D.S. (1997). Cucurbits.

M.R. DABBAS AND SHRAWAN KUMAR

8t h

of ExcellenceYear

Wallingford: CAB International.

Sitterly, W.R. (1978). Powdery Mildews of Cucurbits. In:Spencer, D.M.: The Powdery Mildews, 359-379. AcademicPress Inc. Ltd., London, UNITED KINGDOM.

343-346