Study effects of Biomite doses in control of Tetranychus urticae infesting vegetables crops in Iran

Subject Areas : entomology and othea arthropods

M.  Arbabi ¹ (موسسه تحقیقات گیاه پزشکی کشور)
M.  Emami ² (عضو هیات علمی و استادیار پژوهش در مرکز تحقیقات کشاورزی و منابع طبیعی استان اصفهان)
H.  Rahimi ³ (عضو هیات علمی و استادیار پژوهش در مرکز تحقیقات کشاورزی و منابع طبیعی استان خراسان رضوی)
M. J.  Asari ⁴ (عضو هیات علمی و استادیار پژوهش در مرکز تحقیقات کشاورزی و منابع طبیعی استان کرمان)

Received: 2021-10-04 Accepted : 2021-12-11 Published : 2021-11-22

Keywords:

Abstract :

Web spider mites population playing a major pests on vegetable crops during hot summer months. Effectiveness three biomite doses (1, 1.5 and 2 ppm) on cucumber, muskmelon, watermelon in comparison effects of Neem-Azal 1.2% EC, Propargite 570EW, Abamectin 1.8% EC, 1.5 ml/l detergent liquid soap and water sprayed in controlled agent were evaluated against Tetranychus urticae in Esfahan, Khorasan Razavi and Kerman provinces respectively. Complete randomized block designed with three replications used and each replicate consisted at least 50 cultivated plants in each block. Treatment done when at least 5 mobile spider mite stages in 40% randomly collected leaves observed. By random collection of 30 leaves from each treatment determined, effects of them determined at one day before and 3, 7, 14 days after. Collected data converted into mortality% and mean mortality% analysis done with SAS software. Mean spider mite under leaf side of muskmelon in Khorasan Razavi observed 6 to 12 times and 3-5 times higher in Esfahan and Kerman respectively. Highest mean of 61.6 spider mites recorded under sider of muskmelon leaf for 2 ml/l of biomite treatment in Khorasan Razavi. Higher biomite doses effects recorded 73.46% for 2ml/l up to 7 days in Esfahan and 65.56% and 82.67% up to 14 days after recorded in Khorasan Razavi and Kerman without any phtyotoxicity on plant parts in all treatments. Spraying 2 ml/l of biomite at early morning hours under spider mite incidence, provided higher efficiency, longer toxicity period for controlling vegetable spider mites.