نتایج جستجو برای: agricultural pest management cheilomenes sexmaculata dipping method imidacloprid pyriproxyfen

تعداد نتایج: 2487273  

2015
Nian-Feng Wan Xiang-Yun Ji Jie-Xian Jiang Bo Li

The extensive use of chemical pesticides for pest management in agricultural systems can entail risks to the complex ecosystems consisting of economic, ecological and social subsystems. To analyze the negative and positive effects of external or internal disturbances on complex ecosystems, we proposed an ecological two-sidedness approach which has been applied to the design of pest-controlling ...

سید احمد خاتون‌آبادی, ,

Public (or governmental) extension services suffer from its limitations and inadequacies to fulfill the requirements for sustainable farming practices. This study examines the aspects of practicing agricultural extension Privatization in Isfahan. The statistical sample society of the survey was the extension practitioners and technicians. Data were gathered through field questioning techniques ...

ژورنال: علوم آب و خاک 2005
سید احمد خاتون‌آبادی, ,

Public (or governmental) extension services suffer from its limitations and inadequacies to fulfill the requirements for sustainable farming practices. This study examines the aspects of practicing agricultural extension Privatization in Isfahan. The statistical sample society of the survey was the extension practitioners and technicians. Data were gathered through field questioning techniques ...

2016
Matthew H. Meisner Jay A. Rosenheim Ilias Tagkopoulos

Despite the significant effects of agricultural pest management on crop yield, profit, environmental quality, and sustainability, farmers oftentimes lack datadriven decision support to help optimize pest management strategies. To address this need, we curated a comprehensive data set that consists of pest, pest management, and yield information from 1498 commercial cotton crops in California’s ...

Journal: :Bulletin of mathematical biology 2014
Nina Embleton Natalia Petrovskaya

Evaluation of pest abundance is an important task of integrated pest management. It has recently been shown that evaluation of pest population size from discrete sampling data can be done by using the ideas of numerical integration. Numerical integration of the pest population density function is a computational technique that readily gives us an estimate of the pest population size, where the ...

Journal: :Proceedings. Biological sciences 2007
Takahiro Hosokawa Yoshitomo Kikuchi Masakazu Shimada Takema Fukatsu

The origin of specific insect genotypes that enable efficient use of agricultural plants is an important subject not only in applied fields like pest control and management but also in basic disciplines like evolutionary biology. Conventionally, it has been presupposed that such pest-related ecological traits are attributed to genes encoded in the insect genomes. Here, however, we report that p...

Journal: :international journal of agricultural science, research and technology in extension and education systems 2012
pawan singh bhandari

the study was conducted among the two farmer groups in bhaktapur and kavre districts of nepal. the main objective of the study is to evaluate the effectiveness of ipm ffs on creating awareness and disseminating the knowledge on sustainable pest management to the farmers and to assess the relationships between enhanced ipm knowledge and adoption of ipm strategies by the farmers. the study has be...

2013
Ángel M. Casanova-Torres Heidi Goodrich-Blair

Many lepidopteran insects are agricultural pests that affect stored grains, food and fiber crops. These insects have negative ecological and economic impacts since they lower crop yield, and pesticides are expensive and can have off-target effects on beneficial arthropods. A better understanding of lepidopteran immunity will aid in identifying new targets for the development of specific insect ...

2013
Afef Ladhari Asma Laarif Faten Omezzine Rabiaa Haouala

Aqueous and organic (hexane, chloroform, and methanol) extracts of siliquae, stems and leaves, and seeds of Cleome arabica L. (Brassicales: Capparidaceae) were evaluated in the laboratory for their antifeeding and insecticidal effect on larvae of the cotton leafworm, Spodoptera littoralis (Boisduval) (Lepidoptera, Noctuidae), using a leaf dipping bioassay with castor bean, Ricinus communis L. (...

Journal: :Journal of economic entomology 2010
Julianna K Tuell Rufus Isaacs

Wild bee conservation is regarded as essential for sustainable production of pollinator-dependent crops, yet little is known about the effects on wild bee communities of typical insect pest management programs used postbloom. We developed an insecticide program risk (IPR) index to quantify the relative risk to wild bees of insecticide programs applied to blueberry fields. This was used to deter...

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