Biocontrol Science and Technology (2015) 25, 1241-1253

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S.A. Pelizza, A.C. Scorsetti, M.L. Russo, V. Sy, S.G. Pacheco-Marino and C.E. Lange (2015)
Use of entomopathogenic fungi combined with biorational insecticides to control Dichroplus maculipennis (Orthoptera: Acrididae: Melanoplinae) under semi-field conditions
Biocontrol Science and Technology 25 (11), 1241-1253
Abstract: Grasshoppers are among the invertebrate herbivores that cause most economic losses in grasslands throughout Argentina's Pampas and parts of Patagonia. Chemical insecticides remain the sole option for grasshopper control in this area, despite being of significant environmental concern. Our aim was to evaluate the efficacy of combinations between three entomopathogenic fungi strains (Beauveria bassiana LPSc 1067 and LPSc1082), and Metarhizium anisopliae (LPSc 907), two biorational insecticides (luphenuron and methoxyfenozide), and a new synthetic chemical pesticide (rynaxypyr) in the control of the pest grasshopper Dichroplus maculipennis under field cage conditions. Fungal strains used were adjusted to 1 × 108, 1 × 106 and 1 × 104 conidia/ml. Insecticides were tested at three concentrations: the average concentration recommended for application in the field (100%), 50% of that level and finally 25%. Combinations of the insecticides with B. bassiana (LPSc 1067, LPSc 1082) and M. anisopliae (LPSc 907) caused higher mortality to D. maculipennis nymphs than any of the individual agents used alone. The three insecticides tested did not negatively affect the isolates of the two species of entomopathogenic fungi employed.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Sebastian A. Pelizza, Carlos E. Lange, Ana C. Scorsetti

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
application technology
resistance to pesticides

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Dichroplus maculipennis Grasses/turf/rangeland Argentina
Beauveria bassiana (entomopathogen) Dichroplus maculipennis Argentina
Metarhizium anisopliae (entomopathogen) Dichroplus maculipennis Argentina