Keywords : cotton

Efficiency of egg parasitoid Trichogramma chilonis and larval parasitoid Bracon sp of the cotton worm spinal Earias insulana (Boisd)

Juhina A. Mohammed Ali

ANBAR JOURNAL OF AGRICULTURAL SCIENCES, 2016, Volume 14, Issue 2, Pages 264-270

studied bio-efficiency for each of the parasite eggs Trichogramma chilonis (Hymenoptera, Trichogrammatidae) and larvae Bracon sp. (Hymenoptera, Braconidae) of the cotton worm spinal Earias insulana (Boisd) It was found that the egg parasitoid role in reducing the intensity of the pest eggs .And increased parasitism rate the greater the intensity of the pest eggs reaching the highest percentage of parasitism 96.5% when the density of 30 eggs of the pest and preferred females lay their eggs on the fetus advanced two and three for the modern age and the age of the egg a day،The external parasite that infects larval stage of the lesion Bracon sp. (Hymenoptera, Braconidae) show that the highest proportion of sexual parasitism rate was at education under the conditions of 20 o C and relative humidity 67 ± 3%, reaching 93.6% and 78% nationality female lives have spanned an average of 20.3 days under the same conditions.‬


H.A. AL-wahab; O.A. Ahmmed; A.H.A . AL-Wagga

ANBAR JOURNAL OF AGRICULTURAL SCIENCES, 2013, Volume 11, Issue 2, Pages 289-295
DOI: 10.32649/ajas.2013.87255

A field experiment was carried out at planting cotton in different date in Diyala province during growing season 2012 .The study include two location the first in farm research of agriculture collage / Diyala University the second in AL-mansoraya district near mountain chain Hmreen .The aim of present study was to determine the best perfect date planting variety (Lashata) in Diyala . four date planting was in (15/2,1/3,15/3,1/4) in two location and knowing effect date plant in characteristic and yield cotton .Design of experiment (R.C.B.D) in three replication .Results indication that first date planting in 15/2 gave a significant effect in indicator seed ,number bolls /plant and increase both number of open bolls ,bolls weight .Also Results showed the first location was significant effect in indicator seed ,number bolls /plant ,number of open bolls ,bolls weight and lint yield percentage up to (4.84 ,12.91 ,25.3 ,18.9 and 43.44 ) respectively .

Effects Interaction of Phosphogypsum Levels,Irrigation Water Salinity, Cotton Cultivars on Some Chemical Characteristics of Soil Affected with Saline.

Khames Alawi Juwier; Musa Fitekhan Yasein

ANBAR JOURNAL OF AGRICULTURAL SCIENCES, 2013, Volume 11, Issue 2, Pages 150-167
DOI: 10.32649/ajas.2013.87244

A field experiment was conducted in a silty-loam soil in AL-Saqlawia district, 40 kilometer east the city of Ramadi at the center of AL- Anbar governorate in season 2012, to study the effects of adding phosphogypsum,Irrigation water salinity, cotton cultivars and the interaction among them in some of chemical properties of soil affected with saline. The design used is, the split–split plots design with RCBD. Irrigation treatments occupied the main plots which are, (w1) Irrigation with river water throughout the season; (w2) Irrigation by alternating between river and drainage water; and (w3) Irrigation with drainage water with salinity percentage of 3.55 dS.m-1 throughout the season long. cotton cultivars took sub–plots, and they are, (C1) Coker Welt 310; and (C2) Lashata. Levels of phosphogypsum was under the secondary plots sub–sub plots which are three levels: (GP0) without adding; (GP1) adding an average of 3 t.ha-1 ; and (GP2) adding an average of 6 t.ha-1.
Cotton seeds were planted at 21/3/2012, soil samples representing the depths of the study 0-25,25-50,50-75cm were taken after second reaping at 25/9/2012 to measure; SAR, PH, ECe and dissolved positive ions(Ca+2,Mg+2,Na+) were estimated.The results showed that:
Addition of 6 t.ha-1 of phosphogypsum significantly increased electrical conductivity. The increase at the first depth recorded 25.40%, at the second depth 26.93%, while at the third depth 24.27%. and significantly decreasing soil PH at the first and second depth only, with a declining rate of 3.66% at the first depth, and 2.97% at the second depth, while the third depth recorded an significantly increase in soil PH 1.99%. and significantly decreasing sodium adsorbtion Ratio at the first depth with a declining rate of 3.66% and 2.97% at the second depth. and significantly decreasing soluble sodium in soil at the first depth recording a decline rate of 37.10%, and at second depth 21.65%. and significantly increasing soluble calcium and magnesium for each depth in soil at rates of 37.65% 33.66% and 34.03% for Ca+2. 31.41%, 31.35% and 22.77% for Mg+2 at three depths, respectively compared with control. Irrigation with drainage water significantly increased electrical conductivity by 16.56%. soluble Sodium 28.33% compared with irrigation with river water.

Effect of spraying boron on growth and yield of three varieties of cotton Gossypium hirsutum L.

Raad L. Aboud; Fahdel R. Othman; Assaf; Mohammed A. AL

ANBAR JOURNAL OF AGRICULTURAL SCIENCES, 2011, Volume 9, Issue 1, Pages 1-7

Field experiment was conducted during the spring season of 2008 in the fields of Mosul Technical Institute Cotton research unit to study the in pact of spraying boron in different concentrations (0, 10, 20, 30, 40 mg. g-1) on three varieties of cotton plant (Ashore, Lashata & cooker 310) for cotton yield addition components of spraying boron was applied in three times: first spray was stated with the stage of vegetative growth after 45 from planting, where the second applied with the stage of vegetative and flowering buds after 75 from planting, and the third spray after two weeks from the second spray.
The result of the study showed that the Lashata variety was significantly dominated the other studied. Varieties in terms of plant height, number of vegetative and fruiting branches, number of open bolls and technological changes varieties which are: boll weight, seeds index, lint index, hair weight and total cotton yield: 107.1 cm., 18.46, 4.64, 41.9, 4.54 gm., 8.08, 5.78, 622.1 kg/ d. and 4.53 ton/ h. respectively. The responses was obvious in high concentration of boron used for the three studied varieties .

Evaluation of two methods, the direct method and sweeping– net for sampling of some arthropoda insects associated with foliage of some cotton varieties

Intisar M. Amen Al-Jboory; Hasnawy; Musa M. Al; Hameed H. Al; Karboli

ANBAR JOURNAL OF AGRICULTURAL SCIENCES, 2011, Volume 9, Issue 1, Pages 207-214

Afield experiment was conducted at the field of the College of Agriculture, Abu-Ghraib, Baghdad to evaluate the efficacy of two sampling methods, the direct method and the sweeping – net , to estimate the population density of some insects and mites associated with the foliage of three cotton varieties (Abu-Ghraib , Daes and Ashur). A sampling program on a regular basis has been developed during the season. Results showed clear differences in the types and numbers of insects collected in every method way. The main species collected by the two methods were: the whitefly, Bemesia tabaci, leaf hopper, Asymmetrasca decedents and cotton thrips, Thrips tabaci. There were no significant differences in the numbers of the whitefly for the three varieties by the direct method which amounted to (3.89, 4.39, 4.09) individual/ 5 leaves respectively, while there were significant differences when using the sweep– net, in which the highest numbers was recorded on Daes (6.05/ 5 leaves), which/ differed significantly from the numbers on the varieties Ashur and Abu-Ghraib (11.7 and 13.00)/ 5 leaves respectively. There were no significant differences in the numbers of leaf hopper, A. decedents and cotton thrips T. tabaci colleted in every way for the three varieties. The leaf hopper numbers ranged between 15.39 to 16.19/ 5 leaves by the direct method and 1.80 to 1.39/ 10 sweep-net, while thrips numbers ranged between 1.29 to 1.39/ 5 leaves and, 1.19 to 1.42/ 10 sweep– net. In addition to the main insects species collected above, other species collected by the sweep– net alone included: the cotton seed bug, Oxycarenus hyalipennis, bud and flower bug, Crenotides pallidus (Rambur). Among insect predators collected both methods on all varieties the ladybird, Coccinella septumpuntata L., the ladybird with 11– spots, C. undecimpuntata L., numbers of the last species have been higher on Abu– Ghraib variety (1.32/ 5 leaves), compared 0.89 and 0.99/ 5 leaves for the varieties Daes and Ashur respectively. The anthocorid bug, Orius albidipennis (Reuter) numbers were higher on the variety Ashur (1.06/ 5 leaves), compared with (0.79, 0.89)/ 5 leaves on the varieties Abu-Ghraib and Daes, respectively. Numbers of syrphid fly was relatively similar on all varieties and ranged between (2.18– 2.39)/ 5 leaves. The, aphid lion, Chrysoperla sp. and Scymnus sp. Were collected in low numbers from the varieties by the sweeping– net. The possibility of benefit from the use of the two sampling methods for detecting the presence of insect pests and their predators and to assess vital numerical density in cotton fields also discussed.

Effect of planting dates on some agricultural pests on four cotton cultivars in karkok province

Hattam M. Hussain; Wael M. Jasim; Jasim K. Mohammed; Abdul-Sttar A. Ali

ANBAR JOURNAL OF AGRICULTURAL SCIENCES, 2010, Volume 8, Issue 1, Pages 222-229

Field experiments were conducted to evaluate the effect of planting date on some agricultural pests on four cotton cultivars in the region of Karkok during the growing seasons of 2000 and 2001.Results showed that planting date and cotton cultivar had an obvious influence on pest infestation which was too low except for whitefly Bemisia tabaci Gen and the leafhopper Asymmytrasca decedents (Boali) during both seasons. The lowest population density was 8 individuals/5 leaves recorded on Lashata cultivars planted in 1/4/2000. The highest number of insects was16 idividuals/ 5 leave on Kocker cultivar . The lowest and highest general means were recorded for1/4 and 15/4/2001 planting dates respectively. As for the second growing season , the number of whiteflies and leafhoppers showed no significant differences in most cases. The general means were 7.1 and 1.0 individuals/5 leaves respectively recorded on Lshata cultivar.. The spiny bollworm Erias insulana Boisd was almost absent during both seasons except for the last reading of September for the growing season of 2001. The lowest percentages of infestation was about 9% on Kocker and Marsumi cultivars planted in 1/4/2001 and the highest percentages was 20% recorded for the same cultivars planted in 15/4/2001. The feasibility of utilizing these results in the management and production practices of cotton in Iraq was discussed.

Effect of gamma rays on some characters of several cotton genotyps

Mohamed O. Al-Ubaidi

ANBAR JOURNAL OF AGRICULTURAL SCIENCES, 2009, Volume 7, Issue 2, Pages 82-92

This experiment was conducted during two successive seasons 2001 and 2002 at two experiment Stations (Al-Taji and Al-Madain). The aim was to increase genetic variations bygamma rays. Seeds of 21 genotyps were irradiated by gamma rays (200 Gy). Irradiated seeds were planted in the field with the control ones. During different stages of M1 generation plant growth the percent of emmergense, growth development number of days to flowering and mean of bolls/ plant were measured .The results in (M1) generation showed a reduction in growth development (plant height) of all irradiated genotypes by 9, 7, 17, 8, 19.5 and 41.7 cm for 45, 105, 165, and 185 days and 10.3, 18.1, 26.3 and 43.7 cm for 45, 105, 165, and 185 days from date of planting in Al-Taji and Al-Madain station respectively. The mean of percent of emmergense was reduced by 36% and 35% in the both station respectively. In M2 generation several variants were obtained (2998 and 333 genetic variants from the both Station.
The genotypes 12 and 18 gave a high number of varients 25 and 27 in Al-Taji and 31 and 25 varients in Al–Madain. The same genotypes gave a high number of variants whish have a big boll 11 and 17 varients from the both genotype. It is recommended to use 200 GY dose of gamma ray on cotton, and the genotypes 12 and 18 was the best.

Genetic Parameters and Path Coefficient analysis in Cotton as Affected by Planting Location

Abed M.A.Al-Jumaily

ANBAR JOURNAL OF AGRICULTURAL SCIENCES, 2006, Volume 4, Issue 2, Pages 39-55

Seven varieties of upland cotton (Feard, KC3, H23, Lashata, Coker310, Marsomy, and Ashur) were planted in two different locations (Abu-Ghraib and Al-Musaib) in summer season of 2004 using a randomized complete block design with three replicates to determine the most important characters which can be used as effective selection criteria for improvement yield of seed cotton. Genotypic, phenotypic variances and coefficients of variability, broad sense heritability percentage, co-heritability, genotypic and phenotypic correlation coefficients among yield of seed cotton and other characters were estimated. Path coefficient analysis carried out to partition the genotypic correlation coefficient to the direct and indirect effects. The results showed that genotypic, phenotypic variances and coefficients of variability were varied for all characters studied with difference of planting location, and seed cotton yield appeared large values at two locations. Mean of boll weight appeared large broad sense heritability percentage (60%) in Abu-Ghraib location and earliness character appeared large broad sense heritability percentage (67%) in Al-Musaib location. Higher value of co-heritability coefficient was obtained between seed index and number of boll / plant (3.90) in Abu-Ghraib, and higher value of co-heritability coefficient was obtained between seed cotton yield and ginning outturn (86.26) in Al-Musaib. Seed cotton yield / plant showed highly significant positive genetic correlations with number of bolls / plant (0.991 and 0.792) in Abu-Ghraib location and (0.962 and 0.917) in Al-Musaib location. Results of path coefficient analysis showed that mean of boll weight, number of days to first flower bloom and seed index had the most positive direct effects on seed cotton yield (6.36, 3.91 and 1.01) respectively, and indirect effects through the others, so these characters could be used as a selection criteria in breeding programs of selection to improve seed cotton yield in Iraq.