Sarah Elizabeth Jandricic

• PhD
• Greenhouse Floriculture IPM Specialist at Ontario Ministry of Agriculture and Food and Rural Affairs

Foxglove aphid (Aulacorthum solani (Kaltenbach) (Hemiptera: Aphididae)) is one of the principal aphid pests of greenhouse ornamental crops in North America. Biological control of foxglove aphid mostly relies on the use of Aphidius ervi Haliday (Hymenoptera: Braconidae). However, studies indicate that A. ervi may not be adapted to search for A. sola...

Aphidoletes aphidimyza is one of the most important predators used in the augmentative biological control of aphids, key pests of many crops worldwide. Adult females are very efficient in locating aphid infestations over a relatively long range, up to 45 m, and deposit eggs near or within aphid colonies. The predatory larvae are aphid generalists p...

The aphidophagous midge Aphidoletes aphidimyza (Diptera: Cecidomyiidae) is used in biological control programs against aphids in many crops. Short-term trials with this natural enemy demonstrated that that females prefer to oviposit among aphids colonizing the new growth of plants, leading to differential attack rates for aphid species that differ...

Prey react to the presence of predators in suite of ways that reduce predation risk, but may also negatively affect fitness. Non-consumptive effects (NCEs) of predators on prey are likely important components of biological control and moderators of plant damage in agricultural systems. Yet, few studies have investigated their effects in crops relyi...

Aphidius colemani Viereck (Hymenoptera: Braconidae) is a solitary endoparasitoid used for biological control of many economically important pest aphids. Given its widespread use, a vast array of literature on this natural enemy exists. Though often highly effective for aphid suppression, the literature reveals that A. colemani efficacy within green...

This article summarizes the effects of varroa on drones, and explores the potential powerful role of male gamete selection in the breeding of mite-resistant bees.

Thesis (M.Sc.)--University of Guelph, 2005. Includes bibliographical references.

Foxglove aphid, Aulacorthum solani (Kaltenbach) (Hemiptera: Aphididae), has recently undergone a status change from an occasional pest to a serious pest in greenhouses of North America and the United Kingdom. Little nonanecdotal information exists on the ecology of this insect in greenhouse crops. To help improve integrated pest management decision...

Seeking new isolates of entomopathogenic fungi with greater virulence against greenhouse aphid pests than those currently registered in North America for control of these insects, single-dose screening assays of 44 selected fungal isolates and 4 commercially available strains were conducted against first-instar nymphs of Myzus persicae and Aphis go...

Foxglove aphid, Aulacorthum solani (Kaltenbach) (Hemiptera: Aphididae), has recently undergone a status change from an occasional pest to a serious pest in greenhouses of North America and the United Kingdom. Little nonanecdotal information exists on the ecology of this insect in greenhouse crops. To help improve integrated pest management decision...

During the application of biological control in any crop, a multi-species pest complex can complicate matters. Greenhouse floriculture growers in the Northeastern U.S., Canada, and the UK currently have to contend with both green peach aphid (Myzus persicae Sulzer) and foxglove aphid (Aulacorthum solani Kaltenbach). Previous short-term studies with...

We investigated the oviposition behavior of the aphidophagous midge Aphidoletes aphidimyza (Diptera: Cecidomyiidae) when faced with multiple prey choices, i.e. plants infested with Myzus persicae or Aulacorthum solani (Hemiptera: Aphididae). When within-plant location of aphid patches was controlled for, aphid density was a significant factor in A....

In recent years, foxglove aphid (Aulacorthum solani) (Kaltenbach) has progressed from an occasional pest to a serious pest of many world-wide crops such as potato, pepper, lettuce, and soybean. Now greenhouse floriculture growers in the Northeastern U.S. and Ontario are finding foxglove aphid to be one of their most common aphid problems, adding to...

Aulacorthum solani (Kaltenbach) (known as foxglove aphid or glasshouse potato aphid) is a pest of increasing economic importance in several agricultural crops worldwide, including greenhouse vegetables and ornamentals. Developmental rates and age-specific life tables for a North American population of A. solani on pansy (Viola × wittrockiana) (Gams...

The effectiveness of trap cropping as an integrated control strategy against western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), was explored in potted chrysanthemum, Dendranthema grandiflora (Tzvelev), greenhouse crops. The efficacy of flowering chrysanthemum trap plants, either treated with the insecticide spin...

Fungus gnats (FG) (Diptera: Sciaridae: Bradysia spp.) are economically important pests of greenhouse flowers. Larvae feed on root tissue and transmit a variety of phytopathogens. Atheta coriaria (Kraatz) (Coleoptera: Staphylinidae) is a new biological control agent (BCA) for FG. To support its successful use by the greenhouse industry, its compatib...

This article summarizes the effects of varroa on drones, and explores the potential powerful role of male gamete selection in the breeding of mite-resistant bees.