Vitality and Stability of Insecticide Resistance in AdultPropylaea japonica(Coleoptera: Coccinellidae)

Abstract

Propylaea japonica (Thunberg) was a dominant species among the predacious ladybirds in the fields and active from March to November during a year in Fuzhou, China. Stability of insecticide resistance and vitality in adult P. japonica were investigated. The field ladybird P. japonica in Fuzhou, China, showed 9- to 16-fold resistance ratios to chlorpyrifos, 13- to 2,083-fold to methamidophos, 32- to 230-fold to fenvalerate, and 4- to 49-fold to avermectins, respectively, based on the field monitoring during 2004, 2009, and 2012, as compared with insecticide-susceptible F39 progenies. The resistance levels in the field P. japonica were high during May and November but low during summer. The population growth tendency index in field P. japonica was 0.8-fold as high as that in insecticide-susceptible P. japonica. The field P. japonica also showed high tolerance to the insecticide as compared with pest Lipaphis erysimi Kaltenbach and two parasitoids Diaeretiella rapae and Pachyneuron aphidis. Stable insecticide resistance levels and high vitality were found first in adult P. japonica with 1-, 30-, or 60-d-old adults, or among the adults developed form the eggs produced by newly emerged adults or by 60-d-old adults. Increased activity of glutathione S-transferases, carboxylesterases, and cytochrome P450 monooxygenases might be involved in the resistance of P. japonica. The results indicated that, in certain areas, inclusion of P. japonica for pest control in the integrated pest management would be highly recommended.

Lethal and Sublethal Effects of Insecticides Used in Cotton on Harmonia Axyridis

“…The main enzymes involved in pyrethroid tolerance are cytochrome P450 and esterases, as they catalyze multiple oxidative reactions due to increased gene expression of this family of enzymes (Scott and Wen, 2001). In Propylaea japonica (Thunberg) (Coleoptera: Coccinellidae), the increase in the activity of the enzymes glutathione S-transferase, carboxylesterase, and cytochrome P450 monooxygenase is reported to be involved in greater tolerance to insecticides (Wu et al, 2018).…”

Chemotaxis response and age-stage, two-sex life table of the Cheilomenes sexmaculata (Fabricius) (Coccinellidae: Coleoptera) against different aphid species

“…The use of biological control agents for the suppression of the aphid population is the best alternative control tactic [16]. The Coccinellids are efficient predators among other predators having resistance to several insecticides [17].…”

Insulin Receptor Substrate-1 (IRS1) Regulates Oogenesis and Vitellogenesis inPropylea japonicaby Mediating theFOXO Transcription FactorExpression, Independent of JH and 20E Signaling Pathways

“…4 Due to multiple stress tolerances (heat, drought, humidity, and pesticides) and strong fecundity, P. japonica is recognized as one of the important natural enemies for controlling pests in various horticultural crops and agricultural ecosystems in China. 5,6 Until now, no artificial diet has been found to completely replace the natural prey in the artificial breeding of P. japonica. Moreover, the reproductive capacity of individuals fed with artificial food decreases significantly and even causes failure in completing the generation.…”