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Stephen Ausmus's Images

Title: Photographer
Organization: USDA Agricultural Research Service
Country: United States
24 Images of 12 Subjects View Subject List View Image Details View Thumbnails

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Image Subject Name Scientific Name Description
5431470 griffen's isopod Orthione griffensis
1355058 indigo bunting Passerina cyanea In Big Oak Tree State Park, Missouri, research assistant Shane Pruett (left) records vegetation and plant cover around an Indigo Bunting nest. Technicians Jon Mcallister and Tara Eisenhower use a modified microsecurity camera to spy on nest activity.
1355037 yellow starthistle Centaurea solstitialis
1355047 melaleuca leaf weevil Oxyops vitiosa Seven years after its Florida release, the melaleuca leaf weevil has significantly reduced melaleuca flowering and growth.
1321028 corn Zea mays To validate the corn model, plant physiologists V.R. Reddy and Dennis Gitz collect field data on corn growth and development.
1321027 daylily Hemerocallis spp. Beautiful daylilies like these are a perennial favorite in American gardens. But recently they've been plagued by a rusty fungus. ARS scientists did some detective work to find out what was causing the disease.
1324078 northern leopard frog Rana pipiens A Northern Leopard frog with an abnormal spine (see hump) and a missing right eye (anophthalmia), two of the significant malformations observed in frog populations.
1355059 indigo bunting Passerina cyanea Male
1321020 northern leopard frog Rana pipiens A Northern Leopard frog with an abnormal spine (see hump) and a missing right eye (anophthalmia), two of the significant malformations observed in frog populations.
1355044 melaleuca Melaleuca quinquenervia ARS entomologists Paul Pratt (left) and Cressida Silvers (center) discuss melaleuca treatments used at the Prairie Pines demonstration site, one of the largest in the The Areawide Management and Evaluation of Melaleuca (TAME Melaleuca) project, with Anik Smith, Lee County land manager.
1355032 honey bee varroa mite Varroa destructor Scientists in the ARS Beneficial Insects Research Unit at Weslaco, Texas, have found that a strain of the fungus, Metarhizium anisopliae, is deadly to Varroa mites, such as this one on an adult worker bee's thorax.
1321034 button mushroom Agaricus bisporus Per capita U.S. consumption of mushrooms increased from 3.7 pounds in 1993 to 4.2 pounds in 2000. These button mushrooms are a favorite in or on soups, salads, pizza, and many other dishes.
1355036 yellow starthistle Centaurea solstitialis Morning dew on a yellow starthistle leaf. Evening inoculations with rust spores (from Puccinia jaceae var. solstitialis) are made to catch the overnight dew needed for spore germination and infection.
1355016 strawberry leafroller Ancylis comptana A strawberry leaf is unrolled to reveal a strawberry leafroller (about 2 centimeters long). These plump caterpillars may help beneficial Colpoclypus florus wasps survive the winters of Oregon and Washington so that the wasps can parasitize other leafrollers in the spring.
1355018 Eulophid wasp Colpoclypeus florus This parasitic wasp (about 2 millimeters long) attempts to sting a larva of the oblique-banded leafroller. The wasp's stinger (protruding from its abdomen) injects a toxin that causes the leafroller to spin extra-thick webbing around itself.
1355029 honey bee varroa mite Varroa destructor A young worker bee emerges from a brood cell with a mite on its back.
1355030 honey bee varroa mite Varroa destructor Artificial insemination of a queen. Semen is about to be injected into the oviducts of a queen bee. Thereafter the sperm cells migrate to the sperm storage pouch of the queen. A queen gradually releases sperm from this pouch to fertilize the eggs she lays during her lifetime.
1355031 honey bee varroa mite Varroa destructor Collecting semen from a drone honey bee that will be used to artificially inseminate a queen bee.
1355033 yellow starthistle Centaurea solstitialis Three weeks after yellow starthistle was inoculated with rust spores, ARS plant pathologist Bill Bruckart (left) and California Department of Food and Agriculture plant pathologist Dale Woods inspect one of 20 test sites to learn about the pathogen's performance.
1355034 yellow starthistle Centaurea solstitialis California Department of Food and Agriculture lab assistant Viola Popescu uses a cyclone spore collector developed at the Fort Detrick lab to harvest inoculum from plants at the CDFA greenhouse in Sacramento.
1355035 yellow starthistle Centaurea solstitialis Small, rust-colored spots on starthistle leaves. The presence of these spots indicates that the first field releases of rust spores on starthistle are a success.
1355045 melaleuca Melaleuca quinquenervia In a biological control impact study, research leader Ted Center climbs up to inspect a melaleuca tree that is protected from biocontrol agents with insecticides, while entomologist Cressida Silvers checks one that was planted at the same time and inoculated with biocontrol agents. Note that the biocontrol-inoculated tree is much smaller.
1355046 melaleuca Melaleuca quinquenervia Aerial herbicide applications are often used by land management agencies to control invasive melaleuca trees on large, remote areas of the Everglades. If not controlled, the melaleuca trees in the foreground will soon invade the sawgrass-dominated area in the background, which is more representative of the way the Everglades looks before melaleuca invasion.
1355048 melaleuca Melaleuca quinquenervia Forms dense forests that can reach heights of over 20 meters.

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