Click for new scientific resources and news about Corona[COVID-19]

Paper Information

Journal:   JOURNAL OF AGRICULTURAL SCIENCES   Summer 2000 , Volume 6 , Number 2; Page(s) 5 To 13.
 
Paper: 

COMPARISON OF THE EFFICACY OF FEW NON-ANTIBIOTIC CHEMICAL COMPOUNDS IN CONTROLLING OF FIRE BLIGHT DISEASE OF PEAR TREES UNDER CLIMATIC CONDITIONS OF KARAJ

 
 
Author(s):  HASAN ZADEH N.*
 
* Plant Pests & Disease Res. Institute, Tehran-Iran
 
Abstract: 

A preliminary field trail was conducted in Karaj area in 1998 to examine the efficacy of some chemicals in preventing fire blight blossom, infections on pear trees. The bactericidal effects of these chemicals plus streptomycin as a check were performed on KB medium using replica plating method. streptomycin (200 ppm) and starner (300 ppm) with 23 & 14mm inhibition zones showed respectively the most protective activities against E. amylovora.
In field trail, 12 years old pear trees (cv. Duchesse d'Angouleme) with heavy natural infections were pruned before treating with four chemical compounds i.e. Bordeaux mixture (1%), starner (300 ppm), aliette (3 g/l) and copper oxychloride (3 g/l). The reperiment was conducted in complete randomized blocks design with 3 blocks and 2 replications per treatment in each block. The trees were sprayed 4 times at 6-7 day intervals at different bloom phenology i.e. bud swollen stage, 5%, 50% bloom and full bloom. Two weeks after treatments, the number of diseased blossoms (strikes) per tree in all treatments including non-treated check were counted. The disease incidence (number of infected strikes/tree) was significantly reduced in all treatments as compared to non-treated control. There was no significant difference among the treatments at 5% level by DMRT. Yet starner with %46.3 disease reduction ranked first among the other
four applied chemicals.

 
Keyword(s): 
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 63
 
Latest on Blog
Enter SID Blog