Brief exposure ofBlattella germanica(Blattodea) to insecticides formulated in various microcapsule sizes and applied on porous and non‐porous surfaces

Abstract

Brief contact of B. germanica with insecticide spray residues, which is common in barrier treatment, may lead to low efficacy, especially on porous surfaces. The latter should be preferably treated with CS insecticides containing a fraction with large capsules. In addition to the size of the microcapsules, the role of other factors, such as wall capsule thickness and chemical composition, on CS insecticide activity on various surfaces should be examined in future work.

Efficacy of selected pesticides against synanthropic mites under laboratory assay

“…This suggests that mite response is at least partly dependent on the formulation and encapsulation of a given pesticide. For example, Empire 20 (chlorpyrifos‐ethyl) is designed to be effective against cockroaches and ants, and therefore the active ingredient is encapsulated in particles that are too large to be effective against mites 27…”

“…For the test, 23 AIs in 26 different formulations were selected on the basis of previous screening work 25, 27. The pesticide formulations were diluted in water to the final AI concentration and tested.…”

Novel Approaches to Application and Performance Assessment of Insecticide Applications to Crop Leaves

“…Even though repellency and avoidance have been reported in studies of Þeld crop pests and insecticides (van Herk 2008, Gharalari et al 2009), this aspect of pesticide performance is rarely studied in detail. Other insecticide performance studies involve spraying of surfaces (e.g., leaves, pieces of Þlter paper, tiles) with known amounts of insecticide formulation , Stejskal et al 2009, Yu et al 2009). When spraying surfaces with insecticides, it is standard to use a spray tower (Potter 1952, Liu andStansly 2006) or other spraying devices (Fox et al 2008, Fritz et al 2009), but most of such spraying devices can only be used appropriately under laboratory conditions.…”

The Changing Role of Insecticides in Structural Pest Control

“…Various microencapsulated formulations (CS) were tested against B. germanica for their bioavailability from porous and nonporous surfaces (Stejskal et al, 2007). Larger microcapsules were more readily available on porous substrates than were smaller microcapsules.…”