Keywords : citrus


M. H. Al-Fahdawi; A. M. Al-Janabi

ANBAR JOURNAL OF AGRICULTURAL SCIENCES, 2022, Volume 20, Issue 1, Pages 209-222
DOI: 10.32649/ajas.2022.176325

This study was conducted in the lath house of  Horticulture and Landscape Gardening Department, College of Agriculture , University of Anbar for the period from April to December 2021, to study the effect of foliar spraying with growth regulators of  Forchlorfenuron and Gibberellic acid in the vegetative growth and chemical content in two years old of  Washington navel orange transplants and budded on rough lemon rootstock, the experiment included the foliar application with forchlorfenuron at four concentrations: 0, 4, 8 and 12 mg L-1 which symbolized of F0, F1, F2 and F3 respectively  as well as spraying with three levels of GA3: 0, 25 and 50 mg L-1 which symbolized of G0, G1 and G2 respectively. A factorial experiment was conducted with Randomized Complete Block Design (RCBD) with three replicates for each treatment, the results can be summarized as follows: the two factors of study affected significantly in all of the studied traits especially the foliar application treatment of forchlorfenuron at F2 concentration and the spraying with GA3 at a concentration of G2 where achieved the highest significant increase in the secondary shoots' number, number of leaves increment, leaves area, dry weight of vegetative parts, shoots content of total carbohydrates, concentration of nitrogen and total chlorophyll content in leaves which gave values reached to 5.94, 4.79 shoot sapling-1 and 95.83, 80.62 leaf sapling-1, 34.12, 30.68 dm2 and 87.62, 74.79 g and 9.12, 9.00% and 2.51, 2.50% and 1.44, 1.40 mg.g-1 fresh weight respectively for both study factors, while the control treatment recorded the lowest values for these traits.

Survey of vesicular– arbuscular mycorrhizae (VAM) associated with citrus roots in Baghdad city

Usama A. Alwan; Hadi M. Aboud; Faleh H. Said; Ali J. Abdalsada

ANBAR JOURNAL OF AGRICULTURAL SCIENCES, 2010, Volume 8, Issue 2, Pages 133-138

The results of isolation and identification of (VAM) Mycorrhizae with citrus roots in 14 locations around Baghdad city the predomance of Glomus and Gigaspora genus in the most surveyed locations citrus trees , in spite of high frequency appearance of the first genus . The species Glomus mosseae , showed the high frequency occurrence throughout the year tightest occurrence in ( April , May and October ) at ( 27 , 29 and 25 ) spore 5gm soil respectively while the species Gigaspora margarita was the high frequency occurrence species beyond to the genus Gigaspora and recorded highest occurrence in ( April , May and October ) at ( 9 , 10 and 9 ) spore 5gm soil respectively while another species like Glomus fasciculatus , Glomus destriticola and Gigaspora Calospora appeared in low percentages .

Effect of foliar sprays with Copper and Zinc in the vegetative characters of citrus rootstocks

M. R. Al-Ani

ANBAR JOURNAL OF AGRICULTURAL SCIENCES, 2009, Volume 7, Issue 1, Pages 243-254

This experiment was carried out in the lath house, Department of Horticulture, College of Agriculture, University of Baghdad during growing season of 2004. Sour orange, mandarin and grapefruit seedling with 6 months old were foliar sprayed with CuSO4. H2O at a rate of 1 gm/ l. water and ZnSO4. H2O at a rate of 2 gm/ l water while the control treatment was sprayed with distilled water. After two weeks half the number of the seedlings were inoculated with Phytophthora citrophthora to investigate the influence of these chemicals in controlling the gummosis in these different rootstocks through their vegetative growth. The experimental results shows that the type of rootstock influenced the vegetative growth parameters.i.e. Soure orange seedlings significantly characterized by the highest number of root branches 41.64 branch/ seedling. Mandarin rootstocks shows the highest plant height of 28.95 cm and root length of 15.01 cm. Grapefruit rootstocks gave the highest dry weight of vegetative and root growth from the other types (2.02 gm, 1.12 gm/ plant).
The treatments were significantly influenced the all rootstocks by increasing or decreasing average growth rates. Spraying plants without inoculation (T3) causes 16.14% an increases in leaf area and the average of plant height by 11.07% and the average number of root branches by 21.64% and average of root length by 13.18%. The interaction between the types of the rootstocks and the chemicals indicated that grapefruit seedling sprayed with Zn was superior in the height of plant, dry weight of vegetative and roots growth, leaf area, while the interaction between foliar sprays with Zn and inoculation and the mandarin gave the highest root length. The same treatment with sour orange seedling gave the highest number of root branches.