Journal of Plant Biology

, Volume 47, Issue 3, pp 194–202 | Cite as

Influence of plant extracts and microbioagents on physiological traits of faba bean infected withBotrytis fabae

  • Yehia A. -G. Mahmoud
  • Mohsen K. H. EbrahimEmail author
  • Magda M. Aly


Laboratory and greenhouse experiments were conducted to assess the efficacy ofEucalyptus citriodora, Ipomoea carnea, Cuminum cyminum, Allium sativum and Hyoscyamus muticus leaf extracts, and Streptomyces exfloliatus (S) andTrichoderma harzianum (T) for controllingBotrytis fabae causing chocolate spot disease of faba bean. Laboratory study supported the use ofE. citriodora (Ex 1) andI. carnea (Ex 2) extracts than the others for controlling the growth ofB. fabae. S+T was the best for inhibiting spore germination followed by Ex 1 +Ex 2 after 8 h of testing, whereas Ex 1 +Ex 2 produced the lowest percent of germination after 16 h. After 4 days, the inhibiting order of the growth ofB. fabae was S+T > Ex 1 +Ex 2 > T > Ex 2 > Ex 1 =S. Greenhouse experiments showed the highest activities of peroxidase, catalase and pectinase in the infected plants. These activities were markedly reduced in healthy plants and widely changed by the biocontrol treatments. Applying biocontrol agents to the infected plants increased minerals (N, P, K and Mg), and both Chl biosynthesis and the photosynthetic activity, which in turn led to accumulation of metabolites. This served the plant to resist the detrimental effects ofB. fabae on the plant growth and yield. In this concern, the efficiency of test biocontrol agents seemed to be in the order:T+S > Ex 1 +Ex 2 >T >S > Ex 2 > Ex.


photosynthesis plant extracts Streptomyces Trichoderma Vicia faba 


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Copyright information

© The Botanical Society of Korea 2004

Authors and Affiliations

  • Yehia A. -G. Mahmoud
    • 1
  • Mohsen K. H. Ebrahim
    • 1
    Email author
  • Magda M. Aly
    • 2
  1. 1.Botany Department, Faculty of ScienceTanta UniversityTantaEgypt
  2. 2.Biology Department, Faculty of Education, Kafr El-SheikhTanta UniversityTantaEgypt

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