Abstract
Saadoon, S.M., M.I. Sergany, H.E.M. Mona, A.M.M. Reham and S.B. Gad. 2022. The Efficiency of Using Some Natural Compounds for Management of Citrus Nematode Tylenchulus semipenetrans. Arab Journal of Plant Protection, 40(4): 346-350. https://doi.org/10.22268/AJPP-40.4.346350 The efficacy of chitosan and propolis as well as alcohol and aqueous extracts of cabbage, garlic and ziziphus as bio agents was conducted against Tylenchulus semipenetrans infecting sour orange (Citrus aurantium L.) under greenhouse conditions. All the tested bio-agents significantly reduced in the numbers of nematodes in soil, galls formation and egg masses than those in the untreated (control) and improved plant growth. Results indicated a highly significant increase in total plant shoot fresh and dry weight, plant length was performed for cabbage alcohol extracts (82.1, 104.73 and 119.7%), followed by garlic alcohol extracts (79.5, 103.38 and 100.0%), respectively. Alcohol extracts achieved the highest reduction rate in nematode population with values of 95.92% for cabbage alcohol extract, followed by 94.92% for garlic alcohol extract and 88.73% for garlic aqueous extract, whereas Oxamyl as a systemic nematicide gave the least reduction rate of 60.49%. Results obtained support using bio-nematicides as biological control agents of T. semipenetrans nematode. Keywords: Biological control, extracts, Tylenchulus semipenetrans, citrus
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