This paper elaborated the epidermis properties, transverse sections of leaves, petioles and stems of five cultivated spe-cies belong to five genera of Myrtaceae. They are <i>Callistemon viminalis</i> (Sol. ex Gaertn.) G. Don, <i>Eucalyptus camaldulensis</i> Dehnh., <i>Myrtus communis</i> L., <i>Psidium guajava</i> L. and <i>Syzygium aromaticum</i> (L.) Merr. It was clear that certain structural characteristics were of significant impor-tance in separation of these taxa, such as the presence of hypodermis in the leaves of <i>P. guajava</i>, the absence of stomata from the abaxial surface of leaves of <i>C. viminalis</i> and <i>P. guajava</i>, the isobilateral mesophyll in <i>C. viminalis</i> and <i>E. camaldulensis</i> leaves, the wavy transverse section of stem in <i>C. viminalis</i>, the presence of more than one vascular strand in <i>S. aromaticum</i> petioles as well as the presence of prismatic crystals in addition to the druses in the petioles of <i>P. guajava</i>

The current study was carried out in Basrah Prawn Hatchery during the period from 23 March 2016 till 15 April 2016. Water extracts of four species of aromatic plants: garlic Allium sativum L., eucalyptus Eucalyptus camaldulensis Deh., mint Mentha spicata L. and ginger Zingiber officinale Roscoe were used as alternative materials instead of malachite green to control the pathogenic fungus Saprolegnia parasitica on eggs of the common carp Cyprinus carpio. The reason of using these substituted materials used here is to avoid the carcinogenic effect of malachite green for producers, consumers and abnormalities malformations of fish fries, contamination of the aquatic environment and economic losses resulted from malformation of fish larvae. The results showed significant differences in the sterilization ratio with the studied plants according to species and concentration of the extract in comparison with that of malachite green. The results showed that with application of 100% of the stock solution (full strength of garlic extract), the activity of treatment reached 96%, while lowest activity of sterilization reached 90% with using 100% ginger extract as compared to malachite green (99%). The number of alive fish larvae differs according to the species of the plant; the highest number of alive fish larvae (18694 larvae) was achieved with ginger, while the lower number (12320) was with eucalyptus in comparison with malachite green (13878). No such malformation in the larvae was occurred when treated with garlic, ginger and mint, while just 1% (non-significant) of malformation occurred with eucalyptus in comparison with malachite green (7%).

A field experiment was conducted at Al-Qaim area 90 km north of Basrah Province, Iraq during the growing season of 2018-2019. The purpose of this study was to evaluate the efficacy of three different herbicides includes Pallas 4.5%OD (125ml.Donum-2), Spotlight75%DWG(5g.Donum-2) and Clodex100EC (150ml.Donum-2) to control the weeds growing with two cultivars of wheat (Ebaa-99 and Buhooth-22). The results showed that Ebaa-99 cultivar was superior in the average of plant height (77.99 cm), flag leaf area (29.15cm2), number of tillers (701.50 tillers.m-2), number of spikes (615.61 spikes.m-2), weight of 1000 grain (43.41g), grain yield (5203.34 Kg.ton-2), biological yield (15216.58 Kg/ha), harvest indicator (35.25%), dry weight of narrow-leaved (14.14 g.m-2) and broad-leaved weeds (43.64g.m-2). While Buhooth-22 cultivar revealed superiority in the number of grains per spike (28.66 grain.spike-2), length of the spike (7.76 cm) and protein content (10.47%). Spraying treatments by the formulation of the herbicides Spotlight and Clodex were significantly exceeded other treatments in all crop plant growing components.

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