Damage to Young Leaves of Pear Trees by Bryobia rubrioculus (Scheuten) (Acari: Tetranychidae) in Nepal.
نویسندگان
چکیده
منابع مشابه
بررسی بیولوژی و نوسانات فصلی جمعیت کنه قهوه ای درختان میوه bryobia rubrioculus (scheuten) acari: tetranychidae و شناسایی شکارگرهای آن در منطقه برغان (کرج)
بیولوژی و نوسانات فصلی کنه قهوه ای درختان میوه روی درختان آلبالو در شرایط طبیعی شناسایی شکارگرهای آن در بهار و تابستان سالهای 1382 و 1383 در منطقه برغان کرج بررسی شد. نمونه برداری ها در یک باغ آلوده به کنه که در آن پنج درخت آلبالو علامت گذاری شده بود انجام گردید. واحد نمونه برداری اسپور انتخاب شد. اسپوریه شاخه هایی کوتاه و چوبی گفته میشود. نمونه برداری هر هفته یکبار انجام شده و در هر بار 60 عدد...
15 صفحه اولpopulation abundance and seasonal activity of zetzellia pourmirzai (acari: stigmaeidae) and its preys cenopalpus irani and bryobia rubrioculus (acari: tetranychidae) in sprayed apple orchards of kermanshah, iran
the population densities and spatial distribution patterns of zetzellia pourmirzai khanjani and ueckermann and its preys cenopalpus irani dosse and bryobia rubrioculus (scheuten) were studied in a sprayed orchard in kermanshah, a western province of iran, from 31 may till 7 november, 2007. the interaction (density dependence) between the plant feeding mites and their predator was determined as ...
متن کاملVisible/near infrared reflectance (VNIR) spectroscopy for detecting twospotted spider mite (Acari: Tetranychidae) damage in strawberries.
The twospotted spider mite, Tetranychus urticae Koch, is among the most economically important pests in strawberries (Fragaria spp.). As T. urticae feeds, it ingests mesophyll cells that contain pigments essential for physiologic function and alters radiant energy use of the leaf tissue, severely compromising plant health and productivity. In our study, diffuse reflectance spectroscopy in the v...
متن کاملFecundity in twospotted spider mite (Acari: Tetranychidae) is increased by direct and systemic exposure to imidacloprid.
The effect of imidacloprid on fecundity in twospotted spider mites, Tetranychus urticae Koch, was investigated in laboratory experiments using individual females on bean leaf discs. Mites were directly exposed to spray formulations of imidacloprid or fed on discs cut from a systemically treated bean plant. Imidacloprid-treated T. urticae produced 10-26% more eggs during the first 12 d of adult ...
متن کاملOld and young leaves on plane trees
A leaf of a plane tree is called an old leaf if it is the leftmost child of its parent, and it is called a young leaf otherwise. In this paper we enumerate plane trees with a given number of old leaves and young leaves. The formula is obtained combinatorially by presenting two bijections between plane trees and 2-Motzkin paths which map young leaves to red horizontal steps, and old leaves to up...
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ژورنال
عنوان ژورنال: Journal of the Acarological Society of Japan
سال: 2000
ISSN: 0918-1067,1880-2273
DOI: 10.2300/acari.9.15