OBJECTIVE--To determine the feasibility of qualifying individuals or groups of Yellowstone National Park bison as free from brucellosis. DESIGN--Cohort study. SAMPLE--Serum, blood, and various samples from live bison and tissues taken at necropsy from 214 bison over 7 years. PROCEDURES--Blood was collected from bison every 30 to 45 days for serologic tests and microbiological culture of blood f...

The invasive soybean aphid, Aphis glycines, is a major pest in soybeans, resulting in substantial economic loss. We analyzed the A. glycines transcriptome to identify sequences derived from viruses of A. glycines. We identified sequences derived from a novel virus named Aphis glycines virus 2 (ApGlV2). The assembled virus genome sequence was confirmed by reverse transcription polymerase chain r...

Cucumber mosaic virus (CMV) has become a major limiting factor in snap bean production in the Great Lakes region of North America, and epidemics have occurred more frequently since the soybean aphid, Aphis glycines Matsumura, was introduced. Major aphid vectors of CMV epidemics were identified by statistically relating their temporal dispersal trends to the incidence of CMV. Alates were monitor...

the cotton aphid, aphis gossypii glover is a major pest of greenhouse cucumber in the world. in this study, age specific functional response of aphidius matricariae haliday and praon volucre (haliday) were investigated on a. gossypii at 25±1°c, 60±5% rh and a photoperiod of 14 l: 10 d h. the results showed that the functional response of a. matricariae was type iii during 1st, 2nd, 3rd, 4th and...

abstract the aphid parasitoids, aphidius colemnai viereck and a. matricariae (haliday) (hymenoptera: braconidae: aphidiinae) have high potential as the most effective biological control agents for controlling the cotton aphis aphis gossypii glover (hemiptera: aphididae). in this investigation, the effect of five constant temperatures (10, 15, 20, 25 and 30 °c) on the reproductive parameters was...

the melon aphid, aphis gossypii glover (hemiptera: aphididae), is one of the most important pests of agricultural products in iran. in this study, susceptibility of melon aphid that collected from seven regions (yazd, varamin, mohammadshahr, esfehan, karaj, hashtgerd and ramsar) was compared to pirimicarb and malathion after 24 hours in 2009. bioassay experiments on adults were carried out by u...

This paper describes an Expert System for apple orchard integrated control. The system consists of two parts. In the rst one, help to the agricultural producer is provided in classifying the producer observations. In the second part an interactive abductive module suggests explanations of those observations. Classi cation has been implemented with the aid of discrimination net techniques. The a...

Wildflower strips and biodiversity-friendly management are promoted as ways of enhancing biodiversity natural pest control in agroecosystems. Their efficacy for providing resources shelters enemies has been well studied, but little is known about how wildflower strip mediated by local field landscape composition. In this study, we explored the effects floral perennial flower on faba bean aphids...