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Study on the effects of organic compounds and conventional acaricides in control of Aculops lycopersici on tomato in greenhouse and field conditions

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عنوان دوره: سومین کنگره بین المللی حشره شناسی ایران
نویسندگان
Agricultural Zoology Research Department, Iranian Research Institute of Plant Protection, AREEO, Tehran, Iran,
چکیده
Aculops lycopersici is an important Eriophyid mite pest of tomato in greenhouse and field conditions in the world. Damage symptoms include leaf color changes from green to purple, growth stunt, wilting, dryness and fruit remaining immature. The prevailed way to control the pest is chemical application; however, some of the acaricides particularly in covered crops pose health and environmental risks. Therefore, a research was taken up to compare3 botanical acaricides with novel formulation and low risks namely Biomite (2 ml / L), GC-mite (1 ml / L), Neem 1.8 EC (3 ml / L) with 5 conventional acaricides‌viz. Bifenazate 24% SC (0.5 ml / L), Danisaraba 20% SC (0.5 ml / L), Spirodiclofen 24% SC (0.5 ml / L), Spiromesifen 24% SC(0.5 ml / L), Milbemectin 1% EC (0.75 ml / L) on tomato infested by russet mite in greenhouse and field conditions. Water was spared in control plots. A completely randomize design and a complete block design, both with 3 replications, were employed in greenhouse and field experiments, respectively. Mortality was recorded at 3, 7 and 15 days after treatment by counting live mites on one square cm2 area of lower side of 30 tomato leaves in each treatment. Mean mortality percent of mite was determined by Abbott and Henderson–Tilton formulas and were analyzed using SAS software. Effects of the treatments on mite population at 3rd days sampling found significant (p < 0.05) and at 7th and 14th days remained above 90%, but were not significant (p > 0.05). Mite mortality percent showed significant differences (p < 0.05) among treatments at 3 days interval. The Highest percent mite mortalities were recorded in GC-mite (0.75 ml / L, 92.39%), both doses of Biomite (93.23 and 97.22%) and Neem 1.8 EC (97.11 and 95.15%) after 15 days, respectively. Similarly, synthetic acaricides except for Envidor (80.98%) caused above 90% and placed in the same group of means. It is concluded that all treatments could control tomato russet mite effectively. Application of lower botanical pesticides doses in rotation will keep agricultural crops safe and reduce cost of mite control.
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