Developmental differences of local populations of alfalfa weevil (Hypera postica) (Coleoptera: Curculionidae)
نویسندگان
چکیده
* Correspondence: [email protected]
منابع مشابه
Degree-day requirements for alfalfa weevil (Coleoptera: Curculionidae) development in eastern Nebraska.
The alfalfa weevil, Hypera postica (Gyllenhal), is a serious, yet sporadic defoliator of alfalfa, Medicago sativa L., in Nebraska. A 2-yr study was conducted in 2005 and 2006 to test for variation in degree-day requirements by location in eastern Nebraska. Sampling took place along a latitudinal gradient in three regions of eastern Nebraska. Three fields were sampled in each region during the 2...
متن کاملEvaluation of toxicity of biorational insecticides against larvae of the alfalfa weevil
The alfalfa weevil, Hypera postica (Coleoptera: Curculionidae), is a major pest of alfalfa Medicago sativa L. (Fabaceae). While H. postica usually causes the most damage before the first cutting, in summer of 2015 damaging levels of the pest persisted in Montana well after the first harvest of alfalfa. Although conventional insecticides can control H. postica, these chemicals have adverse effec...
متن کاملA degree-day model of sheep grazing influence on alfalfa weevil and crop characteristics.
Domestic sheep (Ovis spp.) grazing is emerging as an integrated pest management tactic for alfalfa weevil, Hypera postica (Gyllenhal), management and a degree-day model is needed as a decision and support tool. In response to this need, grazing exclosures with unique degree-days and stocking rates were established at weekly intervals in a central Montana alfalfa field during 2008 and 2009. Anal...
متن کاملتعیین پراکنش مکانی سرخرطومیهای برگ‌خوار Hypera postica و ریشهخوار یونجهSitona spp. (Coleoptera: Curculionidae) با استفاده از زمینآمار
در این پژوهش، الگوی پراکنش مکانی سرخرطومیهای برگ‌خوار و ریشهخوار یونجه با استفاده از زمینآمار بررسی شد. برای این منظور، چهار مزرعه‌ی تحقیقاتی به مساحتهای 0/4، 0/5، 3/1 و 7/3 هکتار در دانشکدهی کشاورزی دانشگاه تبریز انتخاب و در دو مقیاس شبکه بندی شدند. مزارع 0/4 و 0/5 هکتار به شبکههای 10×10 متر و مزارع 3/1 و 7/3 هکتار به شبکههای 30×30 متر تقسیم شدند. نمونه‌برداری هفتگی از مراحل مختلف زیس...
متن کاملThe probabilistic economic injury level: incorporating uncertainty into pest management decision-making.
Despite the recognition that the economic injury level (EIL) is determined by dynamic biological and economic parameters, which can be highly variable and uncertain, there has been little effort to quantify uncertainty and to use estimates of uncertainty in the determination of EILs. In this paper, we define the probabilistic EIL (PEIL) and develop PEILs for two insect pest scenarios: alfalfa w...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2016