TY - JOUR

T1 - Effect of narrow-banded blue LED device on host plant settlement by greenhouse whitefly and currant-lettuce aphid

AU - Niemann, Jan-Uwe

AU - Poehling, Hans-Michael

N1 - Funding Information: This work was funded by the Fachagentur Nachwachsende Rohstoffe (FNR), Germany, under the Grant No. 22008214/14NR082. We like to acknowledge Dr. Niklas Stukenberg and M.Sc. Mirko Rakoski for the possibility to use the patented “Vorrichtung und Verfahren zum Schutz von grünen Pflanzen vor herbivoren Insekten“(DE 10 2018 208 424 B3) as a model for our experimental setup.

PY - 2022/10

Y1 - 2022/10

N2 - Manipulating phytophagous insects with light-based repelling techniques has shown its potential to be a useful tool in integrated pest management systems in the future. Underlying optical mechanisms can be applied in field and in protected cultivation, with reflecting materials or emitting light sources, such as LEDs. Many pest insects are characterised by their cryptic lifestyle to avoid intervening pest protection measurements. In addition, there is a high degree of resistance mechanisms against insecticides in certain species. The idea of most light-repelling techniques is to reduce the immigration and the settlement of pest species on hostplants before population growth even starts. We conducted experiments with narrow-banded blue LEDs arranged around the plants and emitting radiation towards the sky. For compact rosette Lactuca sativa and upright-branched Euphorbia pulcherrima, we tested the suitability of the measure on settlement of Trialeurodes vaporariorum in 2 choice experiments. In further choice experiments with reduced number of untreated plants, T. vaporariorum and Nasonovia ribisnigri were evaluated for the effect on hostplant settlement of the light barrier on lettuce plants under more practical conditions. The light barrier shows high repellent impact on hostplant settlement by greenhouse whitefly, independent of different plant architectures. The modified choice experiment showed strong decrease in hostplant settlement for greenhouse whitefly. For currant-lettuce aphid, tendencies are shown, but no statistical effect could be demonstrated. Possible applications and differences between the insect species used for the experiments are discussed.

AB - Manipulating phytophagous insects with light-based repelling techniques has shown its potential to be a useful tool in integrated pest management systems in the future. Underlying optical mechanisms can be applied in field and in protected cultivation, with reflecting materials or emitting light sources, such as LEDs. Many pest insects are characterised by their cryptic lifestyle to avoid intervening pest protection measurements. In addition, there is a high degree of resistance mechanisms against insecticides in certain species. The idea of most light-repelling techniques is to reduce the immigration and the settlement of pest species on hostplants before population growth even starts. We conducted experiments with narrow-banded blue LEDs arranged around the plants and emitting radiation towards the sky. For compact rosette Lactuca sativa and upright-branched Euphorbia pulcherrima, we tested the suitability of the measure on settlement of Trialeurodes vaporariorum in 2 choice experiments. In further choice experiments with reduced number of untreated plants, T. vaporariorum and Nasonovia ribisnigri were evaluated for the effect on hostplant settlement of the light barrier on lettuce plants under more practical conditions. The light barrier shows high repellent impact on hostplant settlement by greenhouse whitefly, independent of different plant architectures. The modified choice experiment showed strong decrease in hostplant settlement for greenhouse whitefly. For currant-lettuce aphid, tendencies are shown, but no statistical effect could be demonstrated. Possible applications and differences between the insect species used for the experiments are discussed.

KW - Blue–green opponency

KW - Host finding

KW - Host settlement

KW - Integrated pest management

KW - Light barrier

KW - N. ribisnigri

KW - T. vaporariorum

UR - http://www.scopus.com/inward/record.url?scp=85131315844&partnerID=8YFLogxK

U2 - 10.1007/s41348-022-00622-7

DO - 10.1007/s41348-022-00622-7

M3 - Article

AN - SCOPUS:85131315844

VL - 129

SP - 1217

EP - 1225

JO - Journal of Plant Diseases and Protection

JF - Journal of Plant Diseases and Protection

SN - 1861-3829

IS - 5

ER -