The response of Liposcelis bostrychophila Badonnel and L. entomophila (Enderlein) (Psocoptera) to phosphine

Ho, Shiaw Hooi; Winks, R.G.

doi:10.1016/0022-474x(95)00005-r

Cited by 53 publications

(36 citation statements)

References 12 publications

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“…In insects homozygous for susceptibility to phosphine, the egg is clearly the most tolerant stage, with pupae and larvae showing a slightly higher tolerance than adults. This agrees with earlier limited indications that eggs are the most tolerant stage in this species (Barker 1969;Hole et al 1976) and with data on other insect pests of stored products including moths (Bell 1976) and psocids (Ho and Winks 1995). In other beetle pests of stored products, pupae are usually more than or almost as tolerant as eggs (Hole et al 1976;Howe 1973;Lindgren and Vincent 1966;Manivannan 2015), although these differences varied with fumigation exposure period (Hole et al 1976;Manivannan 2015).…”

Section: Discussionsupporting

confidence: 91%

Relative tolerance and expression of resistance to phosphine in life stages of the rusty grain beetle, Cryptolestes ferrugineus

et al. 2017

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Cryptolestes ferrugineus is a serious cosmopolitan pest of stored products. Frequent and indiscriminate usage of phosphine has caused the development of high levels of resistance to this fumigant. As there are few alternatives, it is imperative that resistance to phosphine is managed. Effective management requires knowledge of key factors driving the rate of selection. One of the most important factors is the response of each resistance genotype to phosphine, especially heterozygotes. Moreover, it is important to understand the expression of resistance in all life stages as all stages are subjected to selection during fumigation. We determined the relative tolerance and resistance levels to phosphine in all life stages of homozygous parental strains (susceptible and resistant) and their F 1 progeny (heterozygous) and estimated relative dominance of resistance within life stages over 48 h. In susceptible insects, relative tolerance was highest in eggs followed by pupae, then adults which had about the same tolerance as larvae. In homozygous resistant insects, the order of tolerance was adult = egg [ pupae [ larvae and in heterozygotes larvae [ eggs [ pupae [ adults. All life stages expressed resistance with resistance ratios highest in adults [ pupae [ larvae [ eggs. At LC 50 , resistance was incompletely recessive in eggs, pupae and adults and incompletely dominant in larvae. Eggs and adults were also incompletely recessive at LC 95 , but larvae were completely dominant and pupae were incompletely dominant. Our data showed that a proportion of heterozygotes in all life stages, the major carriers of resistance in the field, will survive at very high concentrations, particularly in the egg stage, forming a nucleus for reinfestation or dispersal of resistance.

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Section: Discussionsupporting

confidence: 91%

Relative tolerance and expression of resistance to phosphine in life stages of the rusty grain beetle, Cryptolestes ferrugineus

et al. 2017

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“…A recent study of three common stored grain psocid species revealed the failure of eight registered grain protectants against Liposcelis entomophila (Enderlein) and L. paeta Pearman and the success of only the organophosphates against L. bostrychophila Badonnel . Although earlier studies reported the susceptibility of psocids to phosphine at its current recommended dose (Rees 1994, Ho and Winks 1995, recent research by Rees (1998) suggests that psocids can readily reinfest grain in storages after fumigation. He correlated reinfestation with movement of psocids in and out of storages in response to environmental conditions, irrespective of presence or absence of fumigant inside the storage.…”

mentioning

confidence: 94%

Residual Efficacy of Four Organophosphate Insecticides on Concrete and Galvanized Steel Surfaces Against Three Liposcelid Psocid Species (Psocoptera: Liposcelidae) Infesting Stored Products

Collins

Nayak

Kopittke

2000

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Four organophosphate insecticides, azamethiphos, fenitrothion, chlorpyrifos-methyl, and pirimiphos-methyl, were tested as surface treatments on concrete (porous surface) and galvanized steel (nonporous surface) panels (0.3 by 0.3 m) against adults of three Liposcelid psocid spp.--Liposcelis bostrychophila Badonnel, Liposcelis entomophila (Enderlein), and Liposcelis paeta Pearman. Residual efficacy of these chemicals was assessed at 30 +/- 1 degrees C, 70 +/- 2% RH, and a photoperiod of 12:12 (L:D) h from 1 d after treatment (0 wk) and thereafter at weeks 1, 2, 4, 6, and 8, and then every 4 wk up to week 40. Mortality was recorded at exposure periods of 6 h and then every 24 h until end-point was achieved. L. bostrychophila was the most susceptible species to the organophosphates tested, followed by L. paeta and L. entomophila. We conclude that for long-term protection, azamethiphos is the preferred organophosphate against L. bostrychophila (up to 36 wk on steel and 24 wk on concrete storage surfaces) and L. paeta infestations only on steel surface (up to 28 wk). None of the four organophosphates tested, however, would provide long-term protection against L. paeta on concrete surface and against L. entomophila infestations on either concrete or steel storage surfaces.

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“…Outbreaks of psocids have been reported in humid tropical countries such as Indonesia, Malaysia, Singapore, the Philippines, Thailand, the People's Republic of China, and India (Leong and Ho, 1995;Wang et al, 1999). Routine fumigations of warehouses and storage facilities with methyl bromide have failed to control the pests (Ho and Winks, 1995). In addition, the rapid development of resistance to chemical and physical treatments by psocids has also been reported (Wang and Zhao, 2003).…”

Section: Introductionmentioning

confidence: 97%

Comparative studies of acetylcholinesterase purified from three field populations of Liposcelis entomophila (enderlein) (psocoptera: liposcelididae)

Xiao

Dou

et al. 2010

Arch Insect Biochem Physiol

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Acetylcholinesterace (AChE) is known to be the major target for organophophate and carbamate insecticides and biomolecular changes to AChE have been demonstrated to be an important mechanism for insecticide resistance in many insect species. In this study, AChE from three field populations of Liposcelis entomophila (Enderlein) (Psocoptera: Liposcelididae) was purified by affinity chromatography and subsequently characterized by its Michaelis-Menten kinetics to determine if detectable changes to AChE have occurred. Bioassays revealed that the potential resistance threat of psocids in Sichuan Province (GH) was greater than either Hubei Province (WH) or Chongqing Municipality (BB). Compared to the other two populations, the WH population possessed the highest specific activity of purified AChE. Kinetic analyses indicated that the purified AChE from GH population expressed a significantly lower affinity to the substrate and a higher catalytic activity toward acetylthiocholine iodide (ATChI) (i.e., higher K(m) and V(max) values) than BB and WH populations. In vitro studies of AChE suggest that five inhibitors (aldicarb, eserine, BW284C51, omethoate, and propoxur) all possess strong inhibitory effects with eserine having the strongest inhibitory effect against purified AChE. According to bimolecular rate constants (k(i)), the purified AChE from GH population was least sensitive to all inhibitors except for omethoate. The differences in AChE among the three populations may be partially attributed to the differences in pesticide application and control practices for psocids among the three locations.

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The response of Liposcelis bostrychophila Badonnel and L. entomophila (Enderlein) (Psocoptera) to phosphine

Cited by 53 publications

References 12 publications

Relative tolerance and expression of resistance to phosphine in life stages of the rusty grain beetle, Cryptolestes ferrugineus

Relative tolerance and expression of resistance to phosphine in life stages of the rusty grain beetle, Cryptolestes ferrugineus

Residual Efficacy of Four Organophosphate Insecticides on Concrete and Galvanized Steel Surfaces Against Three Liposcelid Psocid Species (Psocoptera: Liposcelidae) Infesting Stored Products

Comparative studies of acetylcholinesterase purified from three field populations of Liposcelis entomophila (enderlein) (psocoptera: liposcelididae)

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