Determination of damage caused by different populations of Diloboderus abderus (Coleoptera: Scarabaeidae) larvae on wheat

Authors
del Valle, Eleodoro Eduardo; Mayer, Gabriel F.; Mazuquín, Gabriel; Nari, Pablo; Toffoli Arnaudo, Guillermo Daniel; Imvinkelried, Horacio Omar
Publication Year
2018
Language
English
Format
article
Status
Published version
Description
Wheat (Triticum aestivum L.) is the most widely cultivated cereal crop worldwide because it is an important food source for humans. South America has long been associated with wheat production and export. Given the increased application of no till in the last decades, the scarabid Diloboderus abderus has become the main soil pest of this crop. The larvae of this insect (white grubs) feed on roots, causing plant weakening and death. The aim of this work was to determine the relationship between the soil population of D. abderus larvae and the number of established wheat plants. In a plot cultivated with the wheat cultivar Don Mario Algarrobo at a seeding rate of 130 kg ha-1 and with high population levels of this pest, 1-m2 sites with 20-39; 40-60; 80-100; 120-160 and or 200-240 plants were established. At the tillering phenological stage, the number of tillers per plant and of insect larvae in each subplot was counted. The results showed a significant reduction in plant density with increasing soil larval population. The crop counterbalanced the reduction in plant number by increasing the tiller number per unit area. The present work shows that population levels above 11 larvae m-2 generate a significant reduction in the number of wheat plants established in the crop.
Fil: del Valle, Eleodoro Eduardo. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina
Fil: Mayer, Gabriel F.. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina
Fil: Mazuquín, Gabriel. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina
Fil: Nari, Pablo. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina
Fil: Toffoli Arnaudo, Guillermo Daniel. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina
Fil: Imvinkelried, Horacio Omar. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina
Subject
INSECT PEST
SCARAB BEETLES
TRITICUM AESTIVUM
WHEAT PLANT STAND
WHEAT TILLERING
WHITE GRUBS
Agronomía, reproducción y protección de plantas
Agricultura, Silvicultura y Pesca
CIENCIAS AGRÍCOLAS
Access level
Open access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/83224