Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367727320020301CHLOROPHYLL AND CAROTENOID CONTENTS IN TOMATO AND CUCUMBER PLANTS IN RELATION TO DIMETHOATE AND PROFENOFOS APLLICATION1853186125342310.21608/jppp.2002.253423ENM. H. M.ShiboobCentral Laboratory, Faculty of Agriculture (EL-Shatby), University of Alexandria, Alexandria, Egypt.Journal Article20220807The insecticides, dimethoate and profenofos were sprayed on tomato and cucumber plants at the fruiting stage. Effect of these insecticides by different concentrations (half, one, and twice recommended rates) on chlorophyll “a”,”b”, total and carotenoid contents were determined after different days of spraying. Dimethoate was more effective against chlorophyll “a” of tomato and chlorophyll “b” of cucumber leaves and highly reduced total chlorophyll of both plant leaves. Chlorophyll “b” of tomato and “a” of cucumber was more sensitive to profenofos and total chlorophyll was highly reduced in both plants leaves. Profenofos and dimethoate were more active to reduce carotenoid contents of tomato than cucumber leaves.https://jppp.journals.ekb.eg/article_253423_33f295c6b21011359378530b588c74ca.pdfMansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367727320020301HAZARD ANALYSIS OF CRITICAL CONTROL POINTS (HACCP) OF SOME POST HARVEST PESTICIDE IN ORANGE FRUIT1863187125343010.21608/jppp.2002.253430ENSohair A.Gad AllaMinistry of Agriculture, Agricultural Research Centre, Central Laboratory of Residue Analysis of Pesticides and Heavy Metals in Food, Dokki, Egypt.Journal Article20220807The present work was conducted in one of an Egyptian food processors company with the purpose of identifying critical control points (CCP’s) and reducing pesticide residues contaminating incoming raw orange throughout the manufacturing steps. This would certainly improve the quality and ensure the safety of the final food products.
The results revealed that the criteria to determine loss relative to initial and successive steps of post harvest residues in treated orange raw material along different manufacturing procedures. Sodium ortho-phenyl phenate 36% (SOPP), Imazalil 80% and thiabendazole 98% (TBZ) were added to orange raw material in packinghouse with application rate 2 %.
In case of SOPP and Imazalil application the washing and drying steps 4 and 5 could be considered as the CCP’s along orange fruit processing line. The loss percentages of residue relative to initial step were 53.8 ± 1.67 %, 30.63 ± 2.3 % at step 4 . However, SOPP and imazalil percentages of loss were 60.1 ± 1.7 % and 39.47 ± 3.19 % at step 5 respectively. The pattern of TBZ residues suffered dissipation after drying (step 5) 15.27 ± 8.85 % loss relative to initial. Washing and drying steps certainly decreased the initial residues in the end producthttps://jppp.journals.ekb.eg/article_253430_7c6222868b2f11309551dba1b3d1f18c.pdfMansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367727320020301PERSISTENCE OF LEBAYCID AND MALATHION RESIDUES ON AND IN SUGER-BEET PLANTS.1873187725343810.21608/jppp.2002.253438ENM. E. A.HegazyCentral Agricultural Pesticides Laboratory Agricultural Research Center, Dokki-Giza, Egypt.Sh. A. A.ShokrCentral Agricultural Pesticides Laboratory Agricultural Research Center, Dokki-Giza, Egypt.M. M.Abu-zahwCentral Agricultural Pesticides Laboratory Agricultural Research Center, Dokki-Giza, Egypt.R. M.SalemPlant Protection Institute. Agricultural Research Center, Dokki-Giza, Egypt.A . A.BasuniSugar Crops Research Institute. Agricultural Research Center, Dokki- Giza, Egypt.Journal Article20220807These studies were carried out to investigate the residual behaviour of lebaycid and malathion organophosphorus insecticides on sugar-beet (vegetative parts and roots) plants. Determined residue half-life values (RL50) in vegetative parts were 14.4 and 14.7 hours for lebaycid and malathion , respectively.
In vegetative parts, the initial amount detected of lebaycid (5.04 ppm) was less than the initial amount found of malathion (40.90 ppm), while the initial concentration was undetected in sugar-beet roots for each of lebaycid and malathion. The vegetative parts did not have any detectable residues of lebaycid and malathion after 9 and 20 days from application, respectively. No detectable amount of lebaycid and malathion residues were found in the roots all days after treatment. So sugar-beet roots treated with each of the two tested insecticides could be used safely in sugar industryhttps://jppp.journals.ekb.eg/article_253438_ae36a0497e06e01d3ec3a33504ed0724.pdfMansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367727320020301SEASONAL ABUNDANCE AND HOST PREFERENCE OF THE LAND SNAIL, Helicella vestalis INFESTING FOUR CITRUS SPECIES AT BEHERA GOVERNORATE1879188925345010.21608/jppp.2002.253450ENNadia El-HawashyPlant Protection Research Institute, Agricultural Research Center, Dokki-Giza, Egypt.J. M.NakhlaPlant Protection Research Institute, Agricultural Research Center, Dokki-Giza, Egypt.A. W.TadrosPlant Protection Research Institute, Agricultural Research Center, Dokki-Giza, Egypt.Journal Article20220807The small Land snail, <em>Helicella vestalis</em> <em> </em>(Prieffer) is a considerable harmful pest in citrus orchard, in the northern region of Egypt. The population dynamics and host preference was studied on four citrus species at Behera governorate during two successive years (1998 and 1999). The snail <em>H. vestalis</em> was abundant allover the year with maximum peaks during September and/or October. However, the least snail activity was during January and/or February. the number of snails almost doubled throughout only one year. Summer and autumn seasons showed the maximum snail activity with moderate activity during spring, but the least activity was in winter. The snail activity positively and significantly correlated with the temperature but negatively correlated with the relative humidity. Mandarin orchards harboured the least snail activity than orange orchards. Yet, the maximum snail activity was in navel orange, followed by moderate activity in Baladi orange then Sokkari orange at last.https://jppp.journals.ekb.eg/article_253450_d5b97a1528101565ad95d15747799311.pdf