ORIGINAL ARTICLE
Effectiveness of azoxystrobin in the control of Erysiphe cichoracearum and Pseudoperonospora cubensis on cucumber
| 1 | Department of Plant Pathology
Centre for Plant Protection Studies
Tamil Nadu Agricultural University, Coimbatore 641 003, India |
| 2 | Department of Agricultural Entomology, Centre for Plant Protection Studies
Tamil Nadu Agricultural University, Coimbatore 641 003, India |
CORRESPONDING AUTHOR
Anand Theerthagiri
Department of Plant Pathology Centre for Plant Protection Studies Tamil Nadu Agricultural University, Coimbatore 641 003, India
Department of Plant Pathology Centre for Plant Protection Studies Tamil Nadu Agricultural University, Coimbatore 641 003, India
Journal of Plant Protection Research 2008;48(2):147–159
KEYWORDS
TOPICS
ABSTRACT
The bioefficacy of azoxystrobin (Amistar 25 SC) was tested against cucumber downy mildew and powdery mildew diseases. The two season trials of field studies revealed that the disease progression of cucumber downy mildew and powdery mildew was successfully arrested by azoxystrobin. Spraying of azoxystrobin at various doses (31.25, 62.50 and 125 g a.s./ha) revealed that 125 g a.s./ha (500 ml/ha) was considered as the optimum dose for the control of these diseases of cucumber. The treatment also recorded the highest yield of 13.23 and 14.46 tonnes/ha in the first and second season, respectively. No phytotoxic effect of azoxystrobin was observed in the both field trials even at four times of the recommended dose 125 g a.s./ha. The persistence of azoxystrobin at 250 and 500 g a.s./ha was observed up to seven days after last spraying. However, the persistence of azoxystrobin at 31.25, 62.50 and 125 a.s./ha was observed up to three to five days after last spraying. The safe waiting period for the harvest of cucumber fruits was 1.53 days in the first field trial and 2.37 days in the second field trial, respectively at azoxystrobin 125 g a.s./ha. The residues of azoxystrobin were at below detectable level (BDL) in the harvested cucumber fruits.
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
REFERENCES (20)
1.
Anonymous 2004. The Hindu Survey of Indian Agriculture. The Hindu publications, New Delhi, 184 pp.
2.
Baldwin B.C., Clough J.M., Godfrey C.R.A., Godwin J.R., Wriggins T.E. 1996. The discovery and mode of action of ICLA 5504. p. 69–78. In: “Modern Fungicides And Antifungal Compounds” (H. Lyr, H.D. Russell, eds.). Sislert, Intercept, Andover, Hanks, United Kingdom.
3.
Cabras P., Angioni A. 2000. Pesticides residues in grapes, wine and their processing products. J. Agric. Food. Chem. 48 (4): 967–973.
4.
CIB 1989. Manual for Testing Phytotoxicity of Pesticides on Agricultural Crops. Pesticides Association of India, New Delhi, 120 pp.
5.
Grover G.G., Boal R.J. 1998. Effect of oils, sulfurs and oil/sulfur alternation on the control of cherry powdery mildew under high disease pressure. Fungic. Nematic. Tests 53, p. 59.
6.
Gupta S.K., Shyam K.R. 1996. Antisporulant activity of some fungicides against Pseudoperonospora cubensis on cucumber. Indian J. Mycol. Plant Pathol. 26 (3): 293–295.
7.
Hansen M.A. 2000. Powdery mildew of cucurbits. Current Virginia pest management guide for home grounds and animals Virginia cooperative extension, Virginia. (http://www.ext.vt.edu/pubs/pmg...).
8.
Hewitt H.G. 1998. Strobilurins. Fungicides in Crop Protection. CAB International. New York: 128–129. http://www.hmso.gov.uk/legisla.... (2002).
9.
Jamadar M.M., Desai S.A. 1997. Bioefficacy of dimethomorph against downy mildew of grapevine. Adv. Agric. Res. India 4: 81–85.
10.
Jamadar M.M., Sharmaro J., Patil D.R. 2004. Bioefficacy of Amistar 250 SC in the management of downy mildew and powdery mildew diseases on grapes in northern Karnataka. Pestology 28 (12): 60–64.
11.
Mckinney H.H. 1923. A new system of grading of plant diseases. J. Agric. Res. 26: 195–218.
12.
Mejia Arreaza J., Hernandez M.M. 2001. Evaluation of azoxystrobin on the early blight control (Alternaria solani) in tomatoes. Revista de la faculated de Agronomia, Universidad del zulia 18 (2): 106–116.
13.
Ranganathan T. 2001. Azoxystrobin (Amistar 25 SC), a novel fungicides for the control of downy mildew and powdery mildew of grapevine. Pestology 25 (6): 28–31.
14.
Schwartz H.F., Gent D.H. 2005. Downy mildew and powdery mildew (cucumber, melon, pumpkin, squash and zucchini). Current virginia pest management guide for home grounds and animals. Virginia cooperative extension, Virginia, (http://www.ext.vt.edu/pubs/pmg...).
15.
Sendhil Vel V. 2003. Evaluation of azoxystrobin 25 SC against downy mildew and powdery mildew of grapevine. Ph.D. Thesis, Tamil Nadu Agric. Univ., Coimbatore, India, 190 pp.
16.
Sendhil Vel V., Raguchander T., Nakkeeran S., Amutha G., Marimuthu T. 2004a. Bioefficacy of azoxystrobin against downy mildew of grapevine. Pestology 28(10): 44–51.
17.
Sendhil Vel V., Kuttalam S., Raguchander T., Amutha G., Nakkeeran S., Marimuthu T. 2004b. Phytotoxicity and harvest time residues of azoxystrobin in grapes. Pestology 28 (10): 34–37.
18.
Wicks T.J., Hitch C.J. 2002. Integration of strobilurins and other fungicides for the control of powdery mildew on grapes. Australian J. Grapevine Res. 8 (2): 132–139.
19.
Wilcox W.F., Riegel D.R., Wong F.P. 1999. Evaluation of fungicide programs for control of grapevine downy mildew. Fungic. Nematic. Tests 54, p. 111.
20.
Wong F.P., Wilcox W.F. 2001. Comparitive physical modes of action of azoxystrobin, mancozeb and metalaxyl against Plasmopara viticola grapevine downy mildew. J. Plant Dis. 85 (6): 649–656.
RELATED ARTICLE
We process personal data collected when visiting the website. The function of obtaining information about users and their behavior is carried out by voluntarily entered information in forms and saving cookies in end devices. Data, including cookies, are used to provide services, improve the user experience and to analyze the traffic in accordance with the Privacy policy. Data are also collected and processed by Google Analytics tool (more).
You can change cookies settings in your browser. Restricted use of cookies in the browser configuration may affect some functionalities of the website.
You can change cookies settings in your browser. Restricted use of cookies in the browser configuration may affect some functionalities of the website.