EFFECTS OF TEMPERATURE AND RELATIVE HUMIDITY ON GERMINATION OF ASCOSPORES AND CONIDIA OF UNCINULA NECATOR, THE CAUSAL AGANT OF GRAPE POWDERY MILDEW

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HAJIAN SHAHRI M.; SAFARNEZHAD A.; ZAD J.; SHARIFI TEHRANI A.; OKHOVAT S.M.

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Journal: IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE) Year:2006 | Volume:37 | Issue:3 Page(s): 487-496

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Title

EFFECTS OF TEMPERATURE AND RELATIVE HUMIDITY ON GERMINATION OF ASCOSPORES AND CONIDIA OF UNCINULA NECATOR, THE CAUSAL AGANT OF GRAPE POWDERY MILDEW

Author(s)

Keywords

GERMINATIONQ4

COIDIUMQ2

ASCOSPOREQ3

POWDERY MILDEWQ3

GRAPEQ3

Abstract

Conidial and ASCOSPORE GERMINATION of Uncinula necatorn, the causal agent of GRAPE POWDERY MILDEW, was studied at different temperatures and, in different relative humidities. The results indicated that ASCOSPOREs germinated on dry microscopic slides (at saturation humidity in a rang) of 5-30oC. Maximum germanation of ASCOSPOREs (37%) occurred at 25oC. Optimum GERMINATION was measured at a range of 20-30oC. ASCOSPORE GERMINATION at 25oC on dry microscopic slides and at 100, 95, 76 and 54% relative humidities were found to be 37%, 4.5%, 0% and 0% , respectively. The conidia germinated over a wide range of temperatures and relative humidities on either of dry microscopic slides or GRAPE leaves. Minimum temperature for conidial GERMINATION was 6°C with 21°C being optimum temperature for GERMINATION at saturation humidity. Conidia could germinate in between 54 to 100% r.h at a range of 5-35oC. On GRAPE leaves, conidial GERMINATION occurred under 100 %r.h and at a range of 5-35 c. Maximum conidial GERMINATION on leaves took place at 15 and 25oC.

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References

EFFECTIVNESS OF DIFFERENT TEMPERATURE ON GERMINATION CONIDIA AND ASCOSPORE OF LEVEILLULA SAXAOULI CAUSE OF SAXAOUL POWDERY MILDEW DISEASE

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APA: Copy

HAJIAN SHAHRI, M., SAFARNEZHAD, A., ZAD, J., SHARIFI TEHRANI, A., & OKHOVAT, S.M.. (2006). EFFECTS OF TEMPERATURE AND RELATIVE HUMIDITY ON GERMINATION OF ASCOSPORES AND CONIDIA OF UNCINULA NECATOR, THE CAUSAL AGANT OF GRAPE POWDERY MILDEW. IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE), 37(3), 487-496. SID. https://sid.ir/paper/8329/en

Vancouver: Copy

HAJIAN SHAHRI M., SAFARNEZHAD A., ZAD J., SHARIFI TEHRANI A., OKHOVAT S.M.. EFFECTS OF TEMPERATURE AND RELATIVE HUMIDITY ON GERMINATION OF ASCOSPORES AND CONIDIA OF UNCINULA NECATOR, THE CAUSAL AGANT OF GRAPE POWDERY MILDEW. IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE)[Internet]. 2006;37(3):487-496. Available from: https://sid.ir/paper/8329/en

IEEE: Copy

M. HAJIAN SHAHRI, A. SAFARNEZHAD, J. ZAD, A. SHARIFI TEHRANI, and S.M. OKHOVAT, “EFFECTS OF TEMPERATURE AND RELATIVE HUMIDITY ON GERMINATION OF ASCOSPORES AND CONIDIA OF UNCINULA NECATOR, THE CAUSAL AGANT OF GRAPE POWDERY MILDEW,” IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE), vol. 37, no. 3, pp. 487–496, 2006, [Online]. Available: https://sid.ir/paper/8329/en

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