Replication data for: Efficacy of Insecticides to Control the Leafminer Fly Liriomyza Huidobrensis (Blanchard) And its Impacts on Associated Natural Enemies in Potato Cropping Systems of the Cañete Region

All plots were separated by a distance of 4 m. Potato (cv. Canchan) was planted at a distance of 0.3 x 0.9 m.

Three experimental fields were installed in each landscape. Additionally, five commercial potato farmers (n=5 plots) participated in the study in each landscape providing 0.1 ha potato plots within their broad-spectrum insecticide treated fields. Evaluations were made in a similar plot size as for experimental fields.

The concentrations used were based on recommended field rates of these products. (i) Selective insecticide. Two translaminar insecticides abamectin (Vertimec 18EC Syngenta) and cyromazine (Trigard 75 WP Novartis) were applied at recommended rates (abamectin: 1.5 cc/liter; cyromazine: 0.035 g/liter).

Abamectin was applied at GS30, GS40 and GS50, and cyromazine at GS60 and GS70. (ii) Broad-spectrum insecticides. Two translaminar (abamectin and cyromazine) and two non-translaminar (metamidophos: Tamaron 600SL and alphacypermetrin: Cipermex Super ® 100 EC) insecticides were used at 3 and 1.5 cc/liter, respectively.

Metamidophos and cypermetrin are the most common broad-spectrum insecticides used by farmers in the main potato production areas in the Peruvian coast (Cañete, Barranca, and Arequipa) (CIP, 2004). Insecticides were applied five times during the potato season at growth stages GS30 (alphacypermetrin), GS40 (abamectin), GS50-60 (cyromazine + metamidophos), GS60-70 (cyromazine + alphacypermetrin) and GS70-80 (abamectin). (iii) Control treatment.

In non-treated plots water was used as control. The assessments were: larval infestation, parasitism and parasitoid species, Soil-inhabiting predators, insecticide impact, and potato yield.