The effects of maize variety on the density of Prostephanus truncatus (Coleoptera: Bostrichidae) and Sitophilus zeamais (Coleoptera: Curculionidae) in post-harvest stores in Benin Republic

Meikle, William G.; Adda, Cyrille; Azoma, K.; Borgemeister, Christian; Degbey, P.; Djomamou, B.; Markham, R.H.

doi:10.1016/s0022-474x(97)00020-9

Cited by 32 publications

(16 citation statements)

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“…The most likely explanation is that the extent and thickness of the maize husk covering adversely affected the establishment of first instar larvae on the cob. Characteristics of husk cover of maize have been reported to have a substantial effect on infestation levels of the maize weevil Sitophilus zeamais (Motschulsky) (Coleoptera: Curculionidae) (Kossou et al, 1993) and the larger grain borer Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae) (Meikle et al, 1998). Moyal & Tran (1991a) observed 90% mortality of the first two instars of M. nigrivenella in maize in the field.…”

Section: Discussionmentioning

confidence: 99%

Bionomics of Mussidia nigrivenella (Lepidoptera: Pyralidae) on three host plants

Sétamou

Schulthess

Bosque‐Pérez

et al. 1999

Bull. Entomol. Res.

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Life table studies of Mussidia nigrivenella Ragonot, a pest of maize in Benin, showed that host plant species had a significant effect on larval survival and developmental time. The maximum percentage of larvae surviving was recorded on jackbean, Canavalia ensiformis (36%) and lowest on maize (18%). Mean developmental time for larvae was longest on maize (19.8 days) and shortest on jackbean (17.2 days). The number of eggs laid was highest for females from larvae fed on jackbean (x -= 176), followed by velvetbean, Mucuna pruriens (x -= 143), and lowest for females where larvae had fed on maize (x -= 127). Longevity of ovipositing females was higher on jackbean (5.4 days) than of those from any other host plants. According to the growth index and life table statistics, jackbean was the most suitable host plant, followed by velvetbean, and maize, the least suitable. Thus, jackbeans should be recommended for use in mass rearing programmes of M. nigrivenella, e.g. as a host for parasitoids in future biological control programmes. Because of the high suitability of jack-and velvetbeans for M. nigrivenella, planting of these increasingly important cover crops should be timed in such a manner that the emergence of female moths from mature pods does not coincide with maize plants in a suitable developmental stage for oviposition and development of young M. nigrivenella larvae.

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Section: Discussionmentioning

confidence: 99%

Bionomics of Mussidia nigrivenella (Lepidoptera: Pyralidae) on three host plants

Sétamou

Schulthess

Bosque‐Pérez

et al. 1999

Bull. Entomol. Res.

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“…The farmers in Malawi believe that local varieties have higher resistance to storage pests than that of hybrid varieties (Smale, 1995;Chinsinga, 2011;Lunduka et al, 2012). Differences in poundability and flour-to-grain ratio between the local and hybrid varieties implies existence of varietal differences in grain hardness (Blandino et al, 2010;Lunduka et al, 2012), which has long been suspected to play a role in resistance against the storage pests among others (Meikle et al, 1998). Limited information of the local varieties is, however, available on the nutritional quality, and the processing properties of its flour as well as storability of the grains against storage pest.…”

Section: Introductionmentioning

confidence: 99%

Superiority of Malawian orange local maize variety in nutrients, cookability and storability

Murayama¹,

Yamazawa²,

Munthali³

et al. 2017

Afr. J. Agric. Res.

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The objectives of this study were to evaluate the potential of an orange Malawian local maize variety MW5021 by comparing with a hybrid variety DKC-9089 for nutritional quality and processing properties such as proximate and mineral composition as well as pasting and thermal properties of the flour, and resistance against Prostephanus truncatus infestation during storage of the grain. Maize plants sampled for the experiments were cultivated under three different fertilizer applications, namely 0, 92 and 184 kg-N/ha, considering the chemical fertilizer input among Malawian smallholder farmers. Even without fertilizer input, significantly higher contents of crude protein, Mg, P, Ca, Fe and Zn were observed in MW5021, as compared with DKC-9089. Among pasting properties, setback of the flour slurry from MW5021 was significantly lower than DKC-9089 for all fertilizer treatments. Two-way ANOVA indicated that MW5021 had significantly lower number of grains damaged by P. truncatus than DKC-9089, throughout 12 weeks of storage experiment at 28±2°C. Thus, this study revealed that the Malawian orange local variety MW5021 retained by the smallholder farmers has considerably higher nutritional quality and P. truncatus resistance as well as lower retrogradation hardening after cooking the flour, than the hybrid maize DKC-9089.

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“…Thirty‐two time series of data were compiled from previous published studies carried out in southern Benin and conducted in the storage seasons 1994–95 (Meikle et al . 1998a) and 1995–96 (Meikle et al .…”

Section: Methodsmentioning

confidence: 99%

“…The stores were of traditional, local design. A full description of the experimental set‐up is given by Meikle et al . (1998a,c).…”

Section: Methodsmentioning

confidence: 99%

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Teretrius nigrescens against larger grain borer Prostephanus truncatus in African maize stores: biological control at work?

Holst

Meikle

2003

Journal of Applied Ecology

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Summary 1.Following the accidental introduction of the bostrichid beetle Prostephanus truncatus into East and West Africa around 1980, a classical biological control campaign was launched in 1991; the histerid beetle Teretrius nigrescens was released as a biocontrol agent to prevent the destructive outbreak of the pest in small-farm maize stores. However, while the campaign has been ongoing, so has discussion in the scientific community about the merits of this campaign and its chances of success. 2. From published and unpublished data from experimental maize stores in Benin, West Africa, we derived statistical models describing the in-store insect population dynamics, and were thus able to point out significant biological interactions and to explain the observed lack of biological control. 3. We found that (i) T. nigrescens reduced significantly the population growth rate of both P. truncatus and the non-target pest, the weevil Sitophilus zeamais ; (ii) T. nigrescens displayed a positive numerical response to both prey species, P. truncatus and S. zeamais ; (iii) asymmetric competition existed between the two prey species, S. zeamais was negatively affected by P. truncatus but not vice versa; (iv) T. nigrescens and S. zeamais displayed negative intraspecific density-dependence whereas P. truncatus was resource-limited. 4. We conclude that classical biological control with T. nigrescens is not likely to become successful, mainly due to the predator's intraspecific density-dependence and its low population growth rate compared with its prey. We recommend that further research on P. truncatus integrated pest management takes into account the farmer as an active agent managing the store. 5. Synthesis and applications. When biocontrol does not result in satisfactory pest control, as in the case of P. truncatus , farmers should learn how to scout for the pest and take action when a need is detected. In areas where the pest is usually only a minor problem, the agricultural extension service should consider setting up a simple early warning system for their region. When attempts at classical biological control remain unsuccessful, as in the case of P. truncatus now for 10 years, policy-makers should prioritize training of extension service and farmers in integrated pest management techniques (e.g. needbased use of insecticides) as a necessary supplement to biocontrol.

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The effects of maize variety on the density of Prostephanus truncatus (Coleoptera: Bostrichidae) and Sitophilus zeamais (Coleoptera: Curculionidae) in post-harvest stores in Benin Republic

Cited by 32 publications

References 6 publications

Bionomics of Mussidia nigrivenella (Lepidoptera: Pyralidae) on three host plants

Bionomics of Mussidia nigrivenella (Lepidoptera: Pyralidae) on three host plants

Superiority of Malawian orange local maize variety in nutrients, cookability and storability

Teretrius nigrescens against larger grain borer Prostephanus truncatus in African maize stores: biological control at work?

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