Amin et al
Greener Journal of Agricultural Sciences Vol. 3 (4), pp. 295-298, April 2013.
ISSN: 2276-7770 © 2011 Greener Journals
Inducing Resistance in Olive Seedlings against Olive Psyllid, Euphyllura straminea Using Natural Phenol Compound
Amin A.H.1, Helmi A.2 and Youssef A.S.3
1,2Plant Protection Department, Faculty of Agriculture, Ain Shams University, Egypt.
3Plant Protection Institute, ARC, Dokki, Giza, Egypt.
Corresponding Author’s Email: ashraf_helm @ yahoo. com
Euphyllura straminea Loginova was recorded as a key pest
in Egypt in 1988 on olive trees in El Arish and caused
considerable losses in fruit yield. This work aims at
evaluating the toxic and repellent effect of a natural
phenol compound (3, 4 dihydroxy phenol ethanol) to control
and induce resistance to olive seedlings against this insect
pest under insectary conditions. Results showed that
percentages of reduction of insect population were increased
as the phenol compound concentrations increased. The
reduction percentage of nymphs and adults were reached 100%
after 15, 18, 21 days at concentration of 1.0, 0.75 and 0.5
mM, respectively. Also this compound was more effective on
nymphal stage than adults. Spraying this natural phenol
compound (3, 4 dihydroxy phenol ethanol) could be used to
control and induce resistance to olive seedlings against
this pest infestation. Also results indicated that
increasing concentration of 3,4 – DHPE found to prolong the
protective period from 17, 27 and 35 days at 0.50, 0.75 and
1.00 mM concentrations, respectively. Therefore this
compound could be used to induce resistance of olive trees
against olive psyllid infestation.
Keywords: Olive psyllid, Euphyllura straminea, Olive seedlings, Toxicity, Control, inducing resistance, Natural phenol compound.