Pre-Crop Chemical Control Has No Effects on Corn Leaf Aphid, Rhopalosiphum maidis (Fitch) (Hemiptera: Aphididae) Endosymbiotic Bacterial Diversity Along an Industrial Maize Management
Artúr Botond Csorba, Kálmán Szanyi, Szabolcs Szanyi, Gábor Tarcali, Adalbert Balog, Antal Nagy

TL;DR
This study found that pre-crop pesticide use does not affect the bacterial symbionts of corn leaf aphids in industrial maize fields.
Contribution
The study provides new evidence that pre-crop pesticide treatments have no significant impact on aphid endosymbiont diversity.
Findings
The primary symbiont Buchnera aphidicola was present in all aphid samples.
Facultative symbionts like Serratia symbiotica and Wolbachia spp. showed no significant variation due to pesticide use.
Pre-crop pesticide application had no measurable effect on aphid endosymbiotic bacterial diversity.
Abstract
In the present study, the endosymbiotic bacterial species diversity was assessed in a conventionally managed maize (Zea mays) field, that represents more than 90% of the Central European maize crops. Because no insecticide treatment is allowed legally in Europe to control corn leaf aphids (Rhopalosiphum maidis) in industrial maize crops, the only method is the assessment of the pre-crop treatment effects on corn leaf aphids endosymbionts that confers adaptation to host. This is also important because in the last five years, the corn leaf aphid population is increasing; therefore, alternative methods must be considered as no treatments before harvest are allowed in accordance with the European Green Deal. In our study, the primary symbionts Buchnera aphidicola as well as a few facultative species (Serratia symbiotica, Wolbachia spp.) dominate corn leaf aphid communities in all sites and…
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Taxonomy
TopicsInsect symbiosis and bacterial influences · Plant Parasitism and Resistance · Legume Nitrogen Fixing Symbiosis
