TY - JOUR
T1 - Sugar feeding by coccinellids under field conditions
T2 - The effects of sugar sprays in soybean
AU - Seagraves, Michael P.
AU - Kajita, Yukie
AU - Weber, Donald C.
AU - Obrycki, John J.
AU - Lundgren, Jonathan G.
PY - 2011/6
Y1 - 2011/6
N2 - Sucrose was applied weekly throughout the growing season at three US locations (South Dakota [SD], Maryland [MD], and Kentucky [KY]), and coccinellids and aphids (Aphis glycines Matsumura [Hemiptera: Aphididae]) were sampled 24 h later. Total coccinellid densities were 50-77% greater in sugar-sprayed soybean than in untreated plots. Coccinella septempuncata L., Hippodamia convergens Guérin-Méneville, and Harmonia axyridis Pallas were more abundant where sugar was applied. Coleomegilla maculata (DeGeer) was found in equally low numbers in all treatments. Aphid densities were similar in both treatments, and only reached economically threatening levels in SD. Coccinellids digested sugar meals within 1 h of consumption (measured using the cold anthrone test). Despite this narrow window of detection, field-collected coccinellids frequently tested positive for fructose. Under natural conditions, sugar is commonly ingested by coccinellids and sugar sprays increase coccinellid densities and their consumption of sugar. Sugar sprays did not enhance biological control of aphids in this experiment.
AB - Sucrose was applied weekly throughout the growing season at three US locations (South Dakota [SD], Maryland [MD], and Kentucky [KY]), and coccinellids and aphids (Aphis glycines Matsumura [Hemiptera: Aphididae]) were sampled 24 h later. Total coccinellid densities were 50-77% greater in sugar-sprayed soybean than in untreated plots. Coccinella septempuncata L., Hippodamia convergens Guérin-Méneville, and Harmonia axyridis Pallas were more abundant where sugar was applied. Coleomegilla maculata (DeGeer) was found in equally low numbers in all treatments. Aphid densities were similar in both treatments, and only reached economically threatening levels in SD. Coccinellids digested sugar meals within 1 h of consumption (measured using the cold anthrone test). Despite this narrow window of detection, field-collected coccinellids frequently tested positive for fructose. Under natural conditions, sugar is commonly ingested by coccinellids and sugar sprays increase coccinellid densities and their consumption of sugar. Sugar sprays did not enhance biological control of aphids in this experiment.
KW - Anthrone
KW - Aphis glycines
KW - Conservation biological control
KW - Food spray
KW - Non-prey foods
KW - Omnivory
UR - http://www.scopus.com/inward/record.url?scp=79957588554&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79957588554&partnerID=8YFLogxK
U2 - 10.1007/s10526-010-9337-3
DO - 10.1007/s10526-010-9337-3
M3 - Article
AN - SCOPUS:79957588554
SN - 1386-6141
VL - 56
SP - 305
EP - 314
JO - BioControl
JF - BioControl
IS - 3
ER -