Grasshoppers are major pests of agriculture throughout much of the world. Chemical control of grasshoppers played a major role in suppression the damage of these pests. Efficacy of some chemical insecticide formulations was studied against 3rd, 4th and 5th nymphal instars and adults of different species of grasshoppers at the region of Gharb El-Mawhoop, New-Valley governorate, Egypt by using micron ULVA sprayer (ULVA+), Knapsack mist blower fifed with micron air rotary cage (AU8000) and Knapsack mist blower (ordinary back motor). Mortality percentages were calculated after 24, 48 and 72 hrs post-treatment for chemical insecticide treatments.The results indicated that Knapsack mist blower fitted with micron air rotary cage (AU8000) was more effective against 3rd, 4th and 5th nymphal instars and adults of grasshoppers than micron ULVA sprayer (ULVA+) for all treatments. Cypermethrin, fipronil, and fenitrothion recorded more toxicity after 24, 48 and 72 hrs by using full doses more than half doses or quarter doses against nymphal instars and adult stages of grasshoppers, despite of that, the application with half dose give mortality percentages approximately as the full dose, which resulted in reduction of the amount of pesticides and declined pollution of environmental ecosystems, so it is preferable to use the half dose for saving money and low pollution.Conclusively, from this results it could be concluded that the pesticides used have been descendingly arranged according to the efficiency as cypermethrin> fipronil > fenitrothion at all the treatments REFERNCES Abdel-Fatah, T.A. (2005). The combined effects of the entomopathogenic fungus, Metarhizium anisopliae var. acridum isolate IMI 330189 (Green Muscle) and the sub-lethal doses of some insecticides on the desert locust, Schistocerca gregaria (Forskal) Egypt J. Agric. Res., 83(2):551-561. Abdel-Fatah, T.A. and A.E. Ammar (2005). Effect of different restrictors on the toxicity of some Insecticides against the desert locust in Abo-Ramad, Eastern desert, Egypt. Egypt J. of Agric. Res., 83 (2): 563-572. Abdel-Fatah, T.A. and G.M. Abdel-Lattef (2013). Comparison between two spraying equipments and two carriers on the efficacy of some pesticides against different species of grasshoppers in the field. Egypt J. of App. Sci., 28(1): 1-9. Abdel-Fatah, T.A.; G.A. Mohamed and G.M. Abdel-Lattef (2012). Effectiveness of some insecticides against the desert locust and barsem grasshopper in the field. Egypt J. of Appl. Sci., 27(7):89-96. Agwu, J.E.; G.E. Odo; J.C. Oloto and M. Uwagbae (2016)

A filed experiment was carried out during the two successive seasons of 2016/2017 and 2017/2018 at the experimental farm of El-Gemmeiza, Agric Res. Station, ARC, Gharbiya Governorate (Middle Nile Delta, Egypt) to study the effect of planting date (20 th September (Sep) and 10 th October (Oct), irrigation water level at 50, 75 and 100 % of filed capacity (FC) and two foliar spray with Ca (1%) as calcium chloride and/or boron (60 ppm) as boric acid besides unsprayed treatment (control), and their interactions on yield and its components, tuber cracking and tuber quality under clayey soil conditions using flood irrigation system. The adopted treatments were arranged in a split -split plot design with three replicates. The planting dates were arranged in the main plots, irrigation water quantities were arranged in the sub plots, while Ca and/or B foliar sprays were randomly distributed in sub -sub plots.The obtained results indicate that, the tertiary interaction of planting on 10 th Oct. , irrigation at 100% FC and sprayed plants with Ca + B resulted in higher values of total tuber yield, average tuber weight , number of tuber № plant -1 , tuber yieldplant -1 ,N, K, Ca and B contents and DM percentages in 1 st and 2 nd seasons. Total carbohydrates were the highest with the interaction of planting on 10 th Oct. and irrigating at 100 %FC and sprayed plants with B. The increases in total tuber yield were about 253.75 and 177.82 % for tertiary interaction of planting on 10 th Oct , irrigation at 100% FC and sprayed with Ca + B over the interaction of planting on 20 th Sep , irrigation with 50%FC and unsprayed plants, in the 1 st and 2 nd 38 FAWZY MANSOUR & HANAN ABU EL-FOTOH seasons, respectively. As for tuber cracking %, the lowest values were obtained with the tertiary interaction of planting on 10 th Oct, irrigation with 75 %FC and sprayed with Ca + B (11.37 and 10.41 %) in the 1 st and 2 nd seasons, respectively, while the highest values were obtained with the tertiary interaction of planting on 20 th Sep, irrigation at 100 %FC and without Ca and B (25.38 and 26.57 % in the 1 st and 2 nd seasons, respectively).Conclusively, under similar conditions it could be concluded that , the tertiary interaction of planting on 10 th Oct , irrigation at 100 % FC and sprayed plants with Ca + B was superior for enhancing both total tuber yield and quality. Furthermore, on reducing tuber cracking, combination of planting on 10 th Oct, irrigation at 75% FC and spraying the plants with Ca + B is recommended.

Two field experiments were carried out during the two successive winter seasons of 2008/2009 and 2009/2010 at El-Gemmeiza Agricultural Research Station, Gharbeya Governorate, to evaluate the effect of chicken manure levels, biofertilizers, some foliar application treatments and their interactions on plant growth and leaf pigments of garlic (Allium sativum L.) Sids 40 clone. The obtained results showed that the highest values of plant height, number of leaves/ plant, leaf area , fresh and dry weights/plant, neck and bulb diameters at 105 and 135 days after planting in both seasons and dry weight of bulb at 135 days after planting, chlorophyll a, b and total (a+b) as well as carotenoides were recorded with the highest nitrogen rate (120 kg N/fed.) in the form of chicken manure at 4.137 ton/fed. or mineral N (control). Inoculation of garlic cloves with biofertilizers caused a high significant effect on all plant growth characters and leaf pigments as compared to uninoculated plants. Spraying garlic plants with yeast extract significantly increased plant height, number of leaves/ plant, fresh and dry weights/ plant, neck and bulb diameter as well as dry weight of bulb at 135 days after planting, chlorophyll a, b and total (a+b) as well as carotenoides in both season followed with spraying seaweed extract treatment. The best results of vegetative parameters were obtained with application of nitrogen fertilizer at 120 kg N/fed. of chicken manure at rate of 4.137 ton/fed. or mineral nitrogen with biofertilizers and foliar application of yeast extract. Therefore, this treatment could be recommended for improving garlic vegetative growth parameters under similar conditions to this study.

Two field experiments were carried out during the two successive winter seasons of 2015/2016 and 2016/2017 in the privet farm at Vegetables Farm at meet Faris village Dekarns, Dakhlia Governorate to study the effect of magnesium as application methods, and calcium rates as foliar application and the interaction between them on growth, yield and quality of potato cv. Spunta under clay soil conditions using furrow irrigation system .Fertilized potato plants with MgSO 4 at 20 kg /fed. (SA) combined with 4% calcium chloride (FA) gave the highest values of plant height, number of leaves, leaf area/ plant and dry weight /shoot, N, P and K contents in leaves after 70 days form planting , number of tubers/plant, yield / plant and total yield/fed., dry matter, starch contents in both seasons without any significant differences with the interaction between MgSO 4 at 4 % (FA) and CaCl 2 at 2 or 4 % (FA) concerning the number of tubers/ plant in both seasons. While the interaction between MgSO 4 at 4 % (FA) and CaCl 2 at 4 % gave the highest values of Ca and Mg in tuber without any significant differences with MgSO 4 at 20 kg /fed. (SA) and CaCl 2 at 4 % (FA) in both seasons.In this regard, the increases in total yield/fed. were about 41.99 and 42.22 % for the interaction between MgSO 4 at 20 kg /fed. (SA) and CaCl 2 at 4 % (FA), followed by 34.19 and 33.52 % for the interaction between MgSO 4 at 4 % (FA) and CaCl 2 at 2 % (FA) than untreated plants in the 1 st and 2 nd seasons, respectively.

Two filed experiments were carried out during the winter seasons of 2016/2017 and 2017/2018 at the Experimental Farm, El-Gemmeiza, Agric Res. Station, (ARC), Gharbya Governorate (Middle Delta, Egypt), to study the effect of nitrogen fertilization at 90 and 120 kg/fad., and some stimulants; viz, salicylic acid (SA at 100 mg/l ), lithovit at 2 g/l and algae extract at 2%, beside unsprayed treatment on dry weight, yield, bulb quality and storability of garlic, Balady cultivar under clay soil conditions using flood irrigation system. The obtained results revealed that, the interaction between using 120 kg N/fad., and lithovit at 2 g/l increased dry weight of bulb, leaves and total dry weight/plant, N, P and K contents in bulb and leaves mineral uptake, uptake by bulb, leaves and their total uptake by plant as well as total chlorophyll in leaves, average bulb weight, marketable and total yields/faddan. While, the interaction between using 90 kg N/fad., and lithovit or SA increased nitrogen use efficiency, dry matter (DM). TSS, Pungency in bulbs at harvesting time and decreased total weight loss percentage after 180 days from storage in both seasons. The relative increases in total yield/fad., were about 41.96 and 61.11% for the interaction between fertilizing garlic plants with 120 kg N/fad., and spraying with lithovit at 2 g/l over 90 Kg N without spraying with stimulants in the 1 st and 2 nd seasons, respectively. In the same time, the interaction between 90 kg N/fad., and lithovit recorded increases in total yield/fad., were about 9.59 and 10.10% over the plants which received 120 kg N/fad., without spraying with stimulants in the 1 st and 2 nd seasons, respectively.