The Occurrence of Citrus Canker Disease in United Arab Emirates (U.A.E.)

Abstract

Citrus canker disease caused by Xanthomonas campestris pv, citri is reported on lime in the present study for the first time in United Arab Emirates. The disease was found only on lime in 32 orchards out of 4456 citrus orchards inspected during 1984–85. The citrus canker organism in U.A.E. has a host range similar to “A” strain. Copper hydroxide was significantly superior to all other treatments in decreasing the incidence of citrus canker disease that developed on inoculated lime seedlings. Streptocycline, Kasumin, copper oxychloride and Bordeaux mixture were not effective in reducing the incidence of the disease.

Diversity of Morphology, Physiologi, Biochemistry and Virulence of Xanthomonas citri sub sp. citri Causes Cancer in Citrus

“…Setelah diinkubasi, permukaan agar-agar dibasahi dengan larutan iodin selama 30 detik. Hidrolisis pati positif ditandai dengan terbentuknya zona bening di sekitar goresan bakteri (El-Goorani 1989).…”

“…Satu koloni tunggal bakteri digores secara garis lurus pada medium agar-agar susu skim dan dinkubasi selama 48 jam pada suhu 37 ℃. Hidrolisis kasein positif ditandai dengan terbentuknya zona bening di sekitar goresan bakteri (El-Goorani 1989).…”

“…Setelah itu dimasukkan ke dalam lemari pendingin selama 30 menit atau sampai tabung kontrol membeku. Reaksi hidrolisis gelatin positif ditandai dengan mencairnya seluruh atau sebagian medium pada tabung yang diinokulasi pada suhu 4 ℃, sedangkan untuk tabung kontrol tetap membeku (El-Goorani 1989).…”

“…Adanya zona berwarna putih susu di sekitar bakteri menandakan bakteri positif menghidrolisis tween 80. Jika sebaliknya berarti bakteri negatif untuk hidrolisis tween 80 (El-Goorani 1989).…”

Use of Botanicals Against Citrus Canker (Xanthomonas axonopodis pv. citri) Affecting Lime (Citrus aurantifolia Swingle) in Sudan

“…Consequently, it has particularly been managed through eradication procedures and strict quarantine regulations (Gottwald et al, 2002) beside other chemical and cultural practices (Krishna andNema, 1983 andEl-Goorani, 1989). The Asiatic and the atypical strains of the pathotype A (A and A * strains) are widely prevailing in South-West Asia, South-East Asia, the horn of Africa and some other African countries in West Africa (Alizadeh et al, 1990;Al-Saleh et al, 2014;Bui et al, 2008;Derso et al, 2009;El-Goorani 1989;Juhasz et al, 2013). However, CBCD has not been reported in Sudan before autumn 2013 (Elhassan et al, 2014;Eppo, 2013) although some extensive surveys have previously been conducted to establish the possible occurrence of this disease.…”