جستجوی مقالات مرتبط با کلیدواژه "doses" در نشریات گروه "گیاهپزشکی"

Application effective botanical pesticides are an objective to keep natural enemies of citrus red mite (CRM) safe in Caspian costal region of Iran. Eeffects of three doses (1, 3, 5 ml/l) of Pestout®a botanical pesticide, was studied against Panonychus citri infesting orange trees in west and east parts of Mazandaran province during 2019. Abamectin 0.2 ml+0.25 ml horticultural oil, 0.5ml of fenpyroximate 5% EC and hexythiazox 10% EC, 1.5% liquid washing detergent compared with water treated check against citrus red mite. A complete randomized block designed in four replications, 8 treatments, conducted on 5 and 15 years old Tampson orange variety in east and west of Mazandaran province respectively. Treatment was done when 5 active mite stages observed on upper surface of 30% collected leaves randomly. Each treatment effects determined by 50 leaves collected randomly one day before and 3, 7, 14, 21 days after spraying. Collected data was converted into impact percentage by Henderson–tilton formula and mean analysis done with SAS software. Maximum and minimum impact percentages of Pest out® doses from 3rd to 14th days after spraying were recorded 43.87±1.43%, to 89.70 ±0,77% in western and 94.47±1.03% up to 98% in eastern part of the province and declined in both places onwards. Pestout® doses caused decreasing natural mite pest enemies until 7th day and increasing them after until 21st day sampling interval. Statistical effects of all treatment in control CRM damages during three months sampling period on orange fruits weight showed insignificant between treatments (p>0.05). Effects of liquid washing detergent on CRM observed almost similar to 1ml/l and 3 ml/l effects of Pest out® in east and west part of province. Applying 1 and 3–ml doses of Pest out® at lower incidence of CRM will provide effective control in east and west part of Mazandaran province respectively..

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.

Effects bifenazate 24% SC doses (0.5 0.6, 0.7. ml/l) evaluated with spirodiclofen SC 240, fenazaquin  SC 20%, fenproximate 5% SC 5%, fenpropatrin, 10% FL on active stages of  Panonychus ulmi on red apple variety in East (Marand), West Azerbaijan (Oromia), Ardebil (Meshkeinshar) and Khorasan Razavi (Golmakan) provinces during 2010 . Blocked randomized design with three replications used and each replicate consisted four apple trees. Treatment done when mean of 5 mobile mite stages observed in 30% apple leaves collected randomly. Effects fo each treatment carried out by collection of 50 apples leaves and alive mite counted on upper leaf surface at one day before and 7, 14, 21 and 28 days accordingly. Mean active stages of P. ulmi mite/leaf found varied between 3.01 to 7.78 mites, 6.70 to 28.15mites, 3 to 36.66 mites and 17.43 to 26.83 mite among treatments in West Azerbaijan, Khorasan Razavi, East Azerbaijan and Ardebil respectively.  Highest mite mortality% threated by bifenazate doses up to 21 days after recorded 98.33% and 94.85% for 0.7 and 5 ml/l in Oromia and Golmakan, up to 14 and 7 days after observed 99.9% and 68.71% for 0.7 ml/l of bifenazate in  Marand and Meshkeinshar respectively. Bifenazate toxicity on mean of recorded natural enemies (predatory mites, Orius sp, and Thrips sp.) in Meshkeinshar reduced their number but did not eliminate them from apple trees. Higher doses of bifenazate application when mean of P. ulmi recorded lest than 5 mites on 30% of collected leaves, will provide effective control.