Comparison of life history and genetic properties of cowpea bruchid strains and their response to hypoxia

Cheng, Weining; Lei, Jiaxin; Fox, Charles; Johnston, J. Spencer; Zhu‐Salzman, Keyan

doi:10.1016/j.jinsphys.2015.02.008

Cited by 14 publications

(7 citation statements)

References 49 publications

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“…For practical applications, however, this recommended dose has to be verified by trials with much larger insect populations. In addition, different bruchid strains or the same strain under different rearing conditions may vary in their radiosensitivity, similarly to our observations in a number of life‐history and genetic parameters . Although post‐irradiation feeding by developmentally blocked yet live larvae is an unwanted effect, early irradiation when pest numbers are low presumably could minimize the grain damage while avoiding alteration of the physical, physicochemical and nutritional properties of the stored grains.…”

Section: Discussionsupporting

confidence: 77%

Detrimental effects of electron beam irradiation on the cowpea bruchid Callosobruchus maculatus

Sang

Speakmon

Zhou

et al. 2015

Pest Management Science

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Section: Discussionsupporting

confidence: 77%

Detrimental effects of electron beam irradiation on the cowpea bruchid Callosobruchus maculatus

Sang

Speakmon

Zhou

et al. 2015

Pest Management Science

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“…Effectiveness of hermetic bags against C. maculatus has also been tested at the farm level [ 10 , 13 ]. The behavior of adults and other developmental stages of C. maculatus under low oxygen (hypoxia), and other conditions such as high carbon dioxide (hypercarbia) and low oxygen-high carbon dioxide (hypoxia/hypercarbia), has been investigated [ 19 , 21 , 22 ]. However, the behavioral activity associated with slowly declining oxygen levels during hermetic storage has been characterized only minimally.…”

Section: Introductionmentioning

confidence: 99%

Oxygen Consumption and Acoustic Activity of Adult Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae: Bruchinae) during Hermetic Storage

Njoroge

Mankin

Smith

et al. 2018

Insects

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Acoustic monitoring was applied to consider hermetic exposure durations and oxygen levels required to stop adult Callosobruchus maculatus activity and economic damage on cowpea. A 15-d study was conducted with six treatments of 25, 50, and 100 C. maculatus adults in 500 and 1000 mL jars using acoustic probes inserted through stoppers sealing the jars. Acoustic activity as a result of locomotion, mating, and egg-laying was measured by identifying sound impulses with frequency spectra representative of known insect sounds, and counting trains (bursts) of impulses separated by intervals of <200 ms, that typically are produced only by insects. By the end of the first week of storage in all treatments, oxygen levels declined to levels below 4%, which has been demonstrated to cause mortality in previous studies. Concomitantly, insect sound burst rates dropped below an acoustic detection threshold of 0.02 bursts s−1, indicating that the insects had ceased feeding. Statistically significant relationships were obtained between two different measures of the acoustic activity and the residual oxygen level. Based on the experimental results, a simple equation can be used to estimate the time needed for oxygen to decline to levels that limit insect feeding damage and thus grain losses in hermetic storage containers of different insect population levels and various volumes.

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“…The elevated lipase enzymatic activity of C. maculatus homogenate represents a higher energy expenditure of insects resulting in a higher growth and oviposition, these grains being favorable to the proliferation of this important pest of grain during storage, due to conditions favorable to the development of the insect (Cheng, et al ., 2015). Regarding the results of lipase enzymatic activity in C. maculatus homogenate derived from ‘BRS Carijó’, the highest means were observed in the BR 3262, INPA 03–11B and soil N treatments (table 2).…”

Section: Resultsmentioning

confidence: 99%

Biochemical studies of amylase, lipase and protease in Callosobruchus maculatus (Coleoptera: Chrysomelidae) populations fed with Vigna unguiculata grain cultivated with diazotrophic bacteria strains

Silva

Torres

Nóbrega

et al. 2017

Bull. Entomol. Res.

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The objective of this study was to evaluate the enzymatic activity of homogenates of insects fed on grain of cowpea, Vigna unguiculata (L.), cultivars grown with different nitrogen sources. For the experiment we used aliquots of the homogenate of 100 unsexed adult insects, emerged from 10 g of grain obtained from four cowpea cultivars: 'BRS Acauã', 'BRS Carijó', 'BRS Pujante', and 'BRS Tapaihum' grown under different regimes of nitrogen sources: mineral fertilizer, inoculation with strains of diazotrophs (BR 3267, BR 3262, BR 3299; INPA 03-11B, 03-84 UFLA, as well as the control (with soil nitrogen). The parameters evaluated were enzymatic activities of insect protease, amylase and lipase and the starch content of the grains. There were differences in the enzymatic activity of amylase, lipase and protease of insect homogenate according to the food source. A lower activity of the enzyme amylase from C. maculatus homogenate was observed when insects were fed grain of the cultivar BRS Carijó. A lower activity of lipase enzyme from C. maculatus homogenate was observed when the insects fed on grain from the interaction of the cultivar Tapaihum inoculated with BR 3262 diazotrophs. The lowest proteolytic activity was observed in homogenate of insects fed on interaction of 'BRS Carijó' inoculated with BR 3262 diazotrophs. Starch content correlated positively with the amylase activity of C. maculatus homogenate. The cultivar BRS Carijó had a different behavior from the other cultivars, according to the cluster analysis.

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Comparison of life history and genetic properties of cowpea bruchid strains and their response to hypoxia

Cited by 14 publications

References 49 publications

Detrimental effects of electron beam irradiation on the cowpea bruchid Callosobruchus maculatus

Detrimental effects of electron beam irradiation on the cowpea bruchid Callosobruchus maculatus

Oxygen Consumption and Acoustic Activity of Adult Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae: Bruchinae) during Hermetic Storage

Biochemical studies of amylase, lipase and protease in Callosobruchus maculatus (Coleoptera: Chrysomelidae) populations fed with Vigna unguiculata grain cultivated with diazotrophic bacteria strains

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