THE EFFECT OF SEVERAL COMPOUNDS ON THE INDUCTION OF RESISTANCE TO POWDERY MILDEW IN CUCUMBER

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JAMALI ZAVAREH A.A.H.; SHARIFI TEHRANI A.

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Journal: IRANIAN JOURNAL OF PLANT PATHOLOGY Year:2005 | Volume:41 | Issue:4 Page(s): 479-494

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Information Journal Paper

Title

THE EFFECT OF SEVERAL COMPOUNDS ON THE INDUCTION OF RESISTANCE TO POWDERY MILDEW IN CUCUMBER

Author(s)

JAMALI ZAVAREH A.A.H. | SHARIFI TEHRANI A. | Issue Writer Certificate

Keywords

UCUMBERQ2

POWDERY MILDEWQ2

INDUCED RESISTANCEQ4

ACIBENZOLAR-S-METHYLQ4

β AMINO BUTYRIC ACIDQ4

DI-POTASSIUM HYDROGEN PHOSPHATEQ2

NICOTINIC ACIDQ4

SALICYLIC ACIDQ4

LEAF EXTRACT OF REYNOUTRIA SACHALINENSISQ3

Abstract

Powdery mildew, caused by Podosphaera fusca (syn. Sphaerotheca fuliginea), is considered to be an important disease of cucurbits, which is commonly controlled by fungicide application. The side effects of fungicides, however, necessitate searching for new and safe methods, including inducing disease resistance in the hosts. In this research, the effect of the following substances was investigated for inducing resistance in cUCUMBER (cv. Super Dominus) against POWDERY MILDEW: ACIBENZOLAR-S-METHYL (ACI), b-amino butyric acid (BABA), DI-POTASSIUM HYDROGEN PHOSPHATE (K2HPO4), NICOTINIC ACID (NA), SALICYLIC ACID (SA) and extract of Reynoutria sachalinensis (F. Schmidt) Nakai (Rs). The inducers were sprayed onto the upper and lower sides of cUCUMBER leaves. In another experiment systemic effects of these chemicals were tested. The inducers were sprayed onto the upper and tower sides of first true leaves only. Twenty-four hours later, the plants inoculated with the spore suspension of pathogen. Disease severity was determined 10 days after inoculation by measuring number of disease spots per cm2 of leaf surface. Results showed that all tested chemicals significantly reduced the disease severity on the treated leaves, but in varying degrees. ACI and Rs reduced disease severity more than 95% as compared to control. BABA and K2HPO4 reduced disease severity about 50-70% and showed relative effectiveness in disease control. SA and NA showed less than 30% control and considered to be the least effective compounds. From the systemic effect point of view, ACI was very effective; BABA and KzHP04 were relatively effective so that, disease control on the second leaves was 70- 80% that of the first leaves; and Rs, SA and NA did not show a considerable systemic effect (disease control on the second leaves was less than 30% that of the first leaves). These results indicated that ACI and Rs were the most effective compounds for inducing resistance to POWDERY MILDEW in cUCUMBER.

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APA: Copy

JAMALI ZAVAREH, A.A.H., & SHARIFI TEHRANI, A.. (2005). THE EFFECT OF SEVERAL COMPOUNDS ON THE INDUCTION OF RESISTANCE TO POWDERY MILDEW IN CUCUMBER. IRANIAN JOURNAL OF PLANT PATHOLOGY, 41(4), 479-494. SID. https://sid.ir/paper/48263/en

Vancouver: Copy

JAMALI ZAVAREH A.A.H., SHARIFI TEHRANI A.. THE EFFECT OF SEVERAL COMPOUNDS ON THE INDUCTION OF RESISTANCE TO POWDERY MILDEW IN CUCUMBER. IRANIAN JOURNAL OF PLANT PATHOLOGY[Internet]. 2005;41(4):479-494. Available from: https://sid.ir/paper/48263/en

IEEE: Copy

A.A.H. JAMALI ZAVAREH, and A. SHARIFI TEHRANI, “THE EFFECT OF SEVERAL COMPOUNDS ON THE INDUCTION OF RESISTANCE TO POWDERY MILDEW IN CUCUMBER,” IRANIAN JOURNAL OF PLANT PATHOLOGY, vol. 41, no. 4, pp. 479–494, 2005, [Online]. Available: https://sid.ir/paper/48263/en

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