Krischik Lab's Research on Neonicotinoids, Bees, and Beneficial Insects

Krischik lab's research on neonicotinoids, bees, and beneficial insects. Please scroll down.

Bumble bee colonies
St. Paul Campus Green Hall Greenhouse, 2010-2013

Honey bee colonies
St. Paul Campus, 2010-2012

Honey bee colonies
St. Paul Campus, 2010-2012

Residue plants grown in pots
St. Paul Campus, 2010-2012

Demonstration plot of bee plants
St. Paul Campus, 2010-2012

Demonstration plot of bee plants
St. Paul Campus, 2010-2012

Preliminary data on the effects of imidacloprid in sugar syrup on bumble bee foraging

Video below shows bees foraging on 0 ppb imidacloprid

Video below shows bees foraging on 10 ppb imidacloprid

Above 0 ppb imidacloprid, week 3: Bees are actively foraging on pollen and sugar syrup. Pollen scattered all over white paper.

Above 10 ppb imidacloprid, week 4: Bees are sluggish and spend more time sitting. Some pollen on white paper.

Video below shows bees foraging on 20 ppb imidacloprid

Video below shows bees foraging on 100 ppb imidacloprid

Above 20 ppb imidacloprid, week 3: Bees are sluggish and spend more time sitting. Very little pollen scattered on white paper. Data below videos show at 20 ppb compared to 0 ppb, bees move less.

Above 100 ppb imidacloprid, week 3: Bees do not move and spend more time sitting. Very little pollen scattered on white paper. Data below videos show at 100 ppb compared to 0 ppb, bees move less.

Statistics below:20 ppb imidacloprid cause bees to sit for longer time compared to controls

Cages were provided with 0 ppb (control) imidacloprid in sugar syrup (SS) or 20 ppb imidacloprid in SS. Bumble bees in control treatments sat for less time, while in 20 ppb imidacloprid treatments bumble bees sat for significantly longer times.

Statistics below: 100 ppb imidacloprid caused bees to sit for longer time compared to controls

Cages were provided with 0 ppb (control) imidacloprid in sugar syrup (SS) or 100 ppb imidacloprid in SS. Bumble bees in control treatments sat for less time, while in 100 ppb imidacloprid treatments bumble bees sat for significantly longer times.

Analysis of Variance week 3, amount of time sitting in 1500 sec

Source	DF	F Ratio	Prob > F
Treatment	1	17.2412	0.0011
Error	13
C. Total	14

Means and Std Deviations

Level	Number	Mean	Std Dev	Std Err
0	10	198.620	83.568	26.426
20	5	454.236	159.193	71.193

Analysis of Variance week 3, amount of time sitting in 1500 sec

Source	DF	F Ratio	Prob > F
Treatment	1	16.6547	0.0008
Error	17
C. Total	18

Means and Std Deviations

Level	Number	Mean	Std Dev	Std Err
0	10	149.173	48.477	15.330
100	9	479.282	251.430	83.810

Slide shows

MN Honey Producers Meeting: Duluth 2012 Krischik

MN Honey Producers Meeting: Duluth 2012 Scholer

2010-2013 LCCMR Research Results:

Research papers on neonicotinoids, bees, and beneficial insects.

1. Imidacloprid residue in flowering plants treated with a soil application

2. Effects of 1X and 2X on butterflies and lady beetles Krischik, Rogers, Gupta, Varshey pdf, submitted April 2014 to Plosone

3. Effects of 0, 10, 20, 50, and 100 ppb on bumble bees, Scholer and Krischik 2014 pdf

4. Effects of 0, 50, 100, and 200 ppb imidacloprid in sugar syrup on colony health of honeybees, manuscript removed

5. Effects of imidacloprid on PERS and foraging in bumble bees, manuscript removed

6. Effects of 2.3 and 23 ppb imidacloprid and Pristine fungicide in sugar syrup on colony health of honeybees, manuscript removed

Research papers on neonicotinoids, click on line

Tenczar, E. G., and V. A. Krischik. 2007. Comparison of standard (granular and drench) and novel (tablet, stick soak, and root dip) imidacloprid treatments for cottonwood leaf beetle (Coleoptera: Chrysomelidae) management on hybrid poplar. J. Econ. Entomol. 100: 1611-1621.

Krischik, V. A., A .Landmark, and G. Heimpel. 2007. Soil-applied imidacloprid is translocated to nectar and kills nectar-feeding Anagyrus pseudococci (Girault) (Hymenoptera: Encyrtidae) Environ. Entomol. 36(5): 1238-1245.

Rogers, M. A., V. A. Krischik, and L. A. Martin. 2007. Effect of soil application of imidacloprid on survival of adult green lacewing, Chrysoperla carnea (Neuroptera: Chrysopidae), used for biological control in greenhouse. Biological Control 42(2): 172-177.

Gupta, G., and V. A. Krischik. 2007. Professional and consumer insecticides for the management of adult Japanese beetle on hybrid tea rose. J. Econ. Entomol. 100(3): 830-837.

Tenczar, E. G., and V. A. Krischik. 2006. Management of cottonwood leaf beetle (Coleoptera: Chrysomelidae) with a novel transplant soak and biorational insecticides to conserve coccinellid beetles. J. Econ. Entomol. 99(1): 102-108.

Smith, S. F. and V. A. Krischik. 2000. Effects of biorational pesticides on four coccinellid species (Coleoptera: Coccinellidae) having potential as biological control agents in interiorscapes. J. Econ. Entomol. 93(3): 732-736.

Smith, S. F. and V. A. Krischik. 1999. Effects of systemic imidacloprid on Coleomegilla maculata. (Coleoptera: Coccinellidae). Environ. Entomol. 28(6): 1180-1195.

Research papers on insect management, click on line

Krischik, V. A., M. Zbinden, and C. Reed. Landscape IPM: Conservation of beneficial insects with species of native Midwest plants. Environ. Entomol. (in manuscript)

Tenczar, E. G., and V. A. Krischik. 2007. Effects of new cultivars of ninebark on feeding and ovipositional behavior of the specialist ninebark beetle, Calligrapha spiraeae (Coleoptera: Chrysomelidae). HortScience 42(6): 1396-1399.

Robbins, P. S., V. A. Krischik, and 12 others. 2006. Trapping Phyllophaga spp. (Coleoptera: Scarabaeidae: Melolonthinae) using sex attractants. J. Insect Science 6(39): 1-124.

Value of Bees * Types of Bees * Bees & Pesticides * CCD * Conservation * Plants for Pollinators * Bumble Bees * EPA * European Union * Workshop