تمت دراسة تأثير الزيوت العطرية لكل من نبات القرفة السيلانية Cinnamomum zeylanicum، و قشور ثمار الليمون الحامض Citrus limonum، و نبات إكليل الجبل Rosmarinus officinalis في نمو بكتريا Paenibacillus (Bacillus) larvae المسببة لمرض الحضنة الأميركي على نحل العسل العالمي Apis mellifera L.، في مختبرات كلية الزراعة-جامعة دمشق و ذلك خلال عامي 2012-2013، للمساهمة في إعداد برنامج مكافحة متكاملة لمرض الحضنة الأميركي. استخلصت الزيوت العطرية من النباتات المدروسة بطريقة التقطير بالبخار، و اختبر تأثير تراكيز من الزيوت العطرية بين 3.90625 و 500 ميكرو غرام/مل في نمو البكتريا P. larvae بطريقة الأقراص على بيئة مغذية صلبة في أطباق بتري. بينت النتائج أن بعض تراكيز الزيوت العطرية المستخدمة تثبّط نمو البكتريا P. larvae، حُدد أقل تركيز مثبّط لبكتريا P. larvae من الزيت العطري للقرفة السيلانية و الليمون الحامض و إكليل الجبل على التوالي و هي: 31.25 ميكرو غرام/مل، 62.5 ميكرو غرام/مل، 125 ميكرو غرام/مل، من كل زيت عطري.
The effect of some essential oils taken from Cinnamomum zeylanicum, Citrus
limonum and Rosmarinus Officinalis was investigated in relation to the growth of bacteria
Paenibacillus larvae which causes American Foulbrood disease that affects world honey
bees Apis mellifera L. The study was carried out in the laboratories of the Faculty of
Agriculture, Damascus University from 2012 till 2013. This is in order to contribute to
preparing an integrated pest management program for American Foulbrood disease. The
oils were extracted from the plants using steam distillation. The effects of the
concentrations of oils on the growth of P. larvae were tested between (3.90625 - 500
μg/ml) using agar disc diffusion in petri plates. Results showed that the essential oils used
stop the growth of P. larvae in some of their concentrations. The minimal inhibitory
concentrations which stop the growth of P. larvae of the oils of Cinnamomum zeylanicum,
Citrus limonum and Rosmarinus officinalis were recorded at 31.25 μg/ml, 62.5 μg/ml, 125
μg/ml respectively.
References used
ALIPPI, A.M.; RINGUELET, A.J.; CERMELE, E.L.; RE, M.S.; HENNING C.P. Antimicrobial Activity of Some Essential Oils Against Paenibacillus larvae, the Causal Agent of American Foulbrood Disease. Journal of Herbs, Spices & Medicinal Plants, United Kingdom & USA & Singapore & Australia, Vol. 4, 2, 1996, 9-16
ANON. American Foulbrood of Honey Bees. OIE Terrestrial Manual International, 2008, 395-404
AOAC. official methods of analysis of AOAC international, 17th edition. USA, 2000
Symptoms of soft rot showed in some fields cultivated with garlic crop in the
Kissweh region (Damascus countryside). Studying this disease, found that the
incidence rates ranging between 2.91% to 5.59%. 55 bacterial isolates were
isolated from inf
Field experiment was carried out at Research Station of the Faculty of Agriculture,
Muthanna University, Iraq, during 2014/2015 season, to study the effect of adding
NPK, biofertilizers Bacillus Subtilis and Glomus Mosseae on the growth and
yield
Samples of Trout dived into aqueous extract of ginger in different
concentrations (5-15-25)% for one minute and then preserved at 4±1
cº for 13 days. It has studied the effect of aqueous extract of ginger
in bacterial load, including general bacterial census and the census
of pseudomonas. It was also identified the values of the pH and
some organoleptic qualities of meat such as color, smell, texture and
taste.
Effect of different degrees of temperature, different levels of pH , different periods of
light and four media (PDA, OMA, MEA, CzA) was studied in vitro against the growth of
C. gloeosporioides causing anthracnose disease of citrus fruits. The resu
The research was conducted to study an efficacy of the fungus
Trichoderma harzianumin controlling the gray mold disease on
tomato that causing by the fungus Botrytis cinerea. A local isolate
of the fungus T. harzianum was studied under laboratory conditions
using two methods: antagonism and the spore suspension.