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Replication data for: Effect of Landscape Structure and Intercropping System on the Leafminer Fly Liriomyza huidobrensis Population, Foliar Damage and Parasitism in Potato Agroecosystems of the Cañete Region

International Potato Center Dataverse OAI Archive

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Title Replication data for: Effect of Landscape Structure and Intercropping System on the Leafminer Fly Liriomyza huidobrensis Population, Foliar Damage and Parasitism in Potato Agroecosystems of the Cañete Region
 
Identifier https://doi.org/10.21223/P3/1BVYDY
 
Creator Mujica, Norma
 
Publisher International Potato Center
 
Description Study area. The study was conducted through the winter cropping season (from June to November 2007), in the localities of San Juan de Ihuanco (referred to complex landscape) and Cañete valley (referred to simple landscape) in the Cañete region. These localities are situated 130 km south of Lima, at the central coast of Peru. During the potato vegetation period, the average temperature was 15.6 ºC (13.2-18.0 ºC), with a mean monthly rainfall of 0.6 mm and a relative humidity of >80%. Experimental design. Two experimental fields were installed in each type of landscape with two repetitions for each intercropping system. The intercropping systems consisted of a larger potato plot divided into four sub-plots of 2, 4, 8 and 16 rows of potato (variety Canchan) (0.90 m wide and 10 m long) as host plant of L. huidobrensis separated by 2 rows of conservation strips (Fig. 1). The conservation strips strips consisted either of maize as host of Liriomyza graminivora or the weed Galinsoga parviflora as host of Liriomyza sabaziae. Conservation strips were established one week after potato planting. Standard cultural practices for fertilization, watering and disease control were applied but without insecticide applications. Adult flight activity of the leafminer fly. Monitoring was performed using yellow sticky traps consisting of yellow plastic (20 x 20 cm) smeared with sticky material (Tangle trap ®). The traps were fixed to two sticks and placed in the center of each plot at a height of 20 cm above ground; the height of the traps was changed according to plant growth, keeping them steadily 10 cm above the plant foliage. Larval infestation and foliar damage. Leaf infestation by leafminer fly larvae was assessed bi-weekly on potato plots and conservation strips. The evaluation of leafminer fly infestation and parasitoids was done by randomly collecting 10 potato leaves per plot and 5 weed/maize leaves per strip during the vegetation period of the crop. Leaves were preserved in the laboratory to observe and count emerging leafminer fly species and parasitoid adults. Foliar damage. Percentage of area damaged in potato plots was assessed in the field by estimating the percentage of leaf area affected by larvae injury or “mines” per plant. In each subplot we randomly evaluated 3 (2-row subplot), 3 (4-row sub-plot), 9 (8-row subplot) and 21 plants (16-rows subplot) bi-weekly. Parasitism. Percentage of parasitism was estimated from the total number of parasitoids in relation to the total number of individual insects (hosts and parasitoids) successfully reared to the adult stage from the collected plant material. The following formula was used: % Parasitism = Number of parasitoids emerged x 100/total number of emerged leafminer adults and parasitoids.
 
Subject Agricultural Sciences
Potatoes
Cropping system
Conservation strip
Tritrophic interactions
Landscape structure
Ground-dwelling predators
Parasitoids
 
Language English
 
Contributor Administrator, CIP
International Potato Center
CGIAR Research Program on Roots, Tubers and Bananas (RTB)
Federal Ministry of Cooperation and Development (BMZ), Germany
Project: Tackling Liriomyza leafmining flies: invasive pests of global proportions
 
Type xls