Insecticidal Effect of Four Insecticides for the Control of Different Populations of Three Stored-Product Beetle Species

Abstract

The protection of stored products from insect pests is mainly based on suppressive methods by using contact and gaseous insecticides, globally. Following their continuous and improper use, insecticide resistance has been observed in several major insect species and pose a continuous threat to the sustainability of a wide range of active ingredients that are currently in use in stored product protection. In the present work, on-site samplings of insect populations were carried out in local warehouses containing different types of cereals. The collected insects, Rhyzopertha dominica (F.) (Coleoptera: Bostrychidae), Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) and Cryptolestes ferrugineus (Stephens) (Coleoptera: Laemophloeidae), were reared under laboratory conditions to determine tolerance/resistance to widely used insecticides, using different diagnostic protocols. Laboratory populations of the same species were also examined for comparative purposes. Adult knock down and mortality of all populations indicated different patterns of tolerance to phosphine, deltamethrin, cypermethrin, and pirimiphos-methyl. In many cases, the recommended label doses were not able to completely control some of these populations, regardless of their origin, i.e., field-collected or laboratory. The results of the present work underline the importance of population on the efficacy of insecticides that are currently in use in stored product protection.

Efficacy of Four Insecticides Applied to Fortified Rice with Basil against Major Stored-Product Insect Species

“…Several papers have been published on the efficacy of the contact insecticides, such as organophosphorus compounds (OPs) and synthetic pyrethroids, that are wielded for the post-harvest protection of agricultural commodities [14][15][16]. For instance, cypermethrin and deltamethrin are two broad-spectrum contact insecticides that are commonly used against insects of public-health importance [17][18][19].…”

“…It has been examined against different insect pests, such as cockroaches [22], mosquitoes [19] and crop insect species [23,24]. There are also several studies that have tested the efficacy of cypermethrin after direct application on grains against stored-product insects [16,25]. Deltamethrin is also used for the control of stored-product beetles [15,26,27].…”

“…The most well known inert material that has been successfully used and is currently registered globally is diatomaceous earth (DE) [31,32]. Several studies have been carried out in order to evaluate the effect of various types of DEs in storedproduct pest management [16]. Nevertheless, the effectiveness of DEs can be influenced extremely depending on the concentration, time interval, temperature, relative humidity, commodity and different life stages [16,[31][32][33].…”

“…Several studies have been carried out in order to evaluate the effect of various types of DEs in storedproduct pest management [16]. Nevertheless, the effectiveness of DEs can be influenced extremely depending on the concentration, time interval, temperature, relative humidity, commodity and different life stages [16,[31][32][33]. For example, Baliota et al [16] examined the influence of temperature on the insecticidal effect of diatomaceous earth against the rusty grain beetle, Cryptolestes ferruguneus Stephens (Coleoptera: Laemophloeideae), the sawtoothed grain beetle, Oryzaephilus surinamensis (L.) (Coleoptera: Silvanidae), and the confused flour beetle, Tribolium confusum Jacquelin du Val (Coleoptera: Tenebrionidae), and they clearly found that the increase in temperature to 30 • C and the highest dose rate increased the adult mortality levels.…”

Türkiye'deki Sitophilus oryzae L., 1763 ve Sitophilus granarius L., 1758 (Coleoptera: Curculionidae) popülasyonlarında malathion direncinin belirlenmesi

“…In addition, malathion, which was first registered in Türkiye in 1964, is still used today as a residual insecticide against insect pests (Oden & Sahin, 1964;Alagöz & Sağlam, 2022). Factors such as long-term and repeated applications of insecticides, intensive and high-dose applications, and changes in insect populations increase the frequency of insecticideresistant individuals in insect populations and lead to failure in pesticide applications (Ferizli & Berisli, 2005;Baliota et al, 2022;Hoobdel et al, 2022). In addition, it was determined that stored insect pests showed differences in terms of sensitivity to malathion.…”