Goat performance on pure Andropogon gayanus pastures or associated with legumes

Moura, Raniel Lustosa de; Oliveira, Maria Elizabete de; Carvalho, Wanderson Fiares de; Rodrigues, Marcônio Martins; Santos, Maurílio Souza dos; Edvan, Ricardo Loiola; Abdalla, Adibe Luiz; Moreira, Marcelo Zacharias; Silva, Edson Mendes da

doi:10.1007/s11250-020-02434-z

Cited by 2 publications

(1 citation statement)

References 44 publications

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“…The species with the lowest sensitivity index to water stress, in decreasing order, were A. Gayanus, P. pedicellatum, and C. Mimosoides suggest that these species are the most tolerant to water deficits. Previous studies (Bargali and Bargali 2016;de Moura et al 2020) have reported that A. Gayanus and P. pedicellatum are drought-tolerant species. In addition, it is argued that C.mimosoides can withstand low water deficit (Bargali and Bargali 2016).…”

Section: Effect Of Water Stress On Plant's Height and Above-ground Bi...mentioning

confidence: 91%

Assessing the competitive ability of the invader Senna obtusifolia with coexisting natives species under different water stress regimes

et al. 2022

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Invasive species tend to pose a threat to ecosystem biodiversity, functioning, and ecosystem service provision. This study was conducted in Burkina Faso to assess the competitiveness of an invasive species Senna obtusifolia that is a less palatable legume plant in West African Sahelian rangelands. To address the research hypothesis that the recurrent drought in the Sahel results in S. obtusifolia being more competitive in the land invasion, we conducted an interspecific competition involving S. obtusifolia and 3 herbaceous species (Andropogon gayanus, Chamaecrista mimosoides, and Pennisetum pedicellatum) in a greenhouse experiment under four water stress regimes using a replacement series design. The height and biomass of each species were measured throughout four months experiment. In the severe water regime, S. obtusifolia was the most sensitive to water deficit while the 3 other species were found to be resistant. In addition, in all water regimes, the aggressivity index revealed that S. obtusifolia was less competitive than the grass species A. gayanus and P. pedicellatum. Further, the study discovered that drought in the Sahel made S. obtusifolia more vulnerable than the other species. Hence the invasion of Sahelian rangelands by S. obtusifolia could be favored by overgrazing that reduces fodder species' dominance and competitiveness. Good management of sahelian rangelands by controlling grazing could help to reduce S. obtusifolia invasion and provide more fodder for livestock.

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Section: Effect Of Water Stress On Plant's Height and Above-ground Bi...mentioning

confidence: 91%

Assessing the competitive ability of the invader Senna obtusifolia with coexisting natives species under different water stress regimes

et al. 2022

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Effect of pyriproxyfen on development and survival of Anopheles gambiae sensu stricto under forested and deforested areas

Nampelah

Chisulumi

Yohana

et al. 2022

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Background The land cover changes in the form of deforestation are known for their impact on enhancing Anopheline life-history traits. In most cases, these traits depend on environmental parameters such as temperature and light. Pyriproxyfen is an insect growth regulator juvenile hormone (JH) designed to inhibit adult mosquito emergence. It is an effective biolarvicide in controlling immature stages of malaria vectors and many other insects. Despite the known efficiency of pyriproxyfen in malaria vector control, but the understanding of its performance under deforested or afforested areas is not clear. The present study aimed at evaluating the impact of pyriproxyfen on development and survivorship of Anopheles gambiae s.s. in forested and deforested areas. Tests of two dosages (0.03 ppm.ai. and 0.3 ppm.ai.) of pyriproxyfen were done in standardized semi-field conditions under ambient temperature and light in netting screened environment. The plastic artificial microcosms containing 1 kg of soil and 2000 mL of dechlorinated water were used. First instars larvae were distributed in densities of 20, 40, and 60 in six replicates each, to form a total of 18 microcosms per each land cover type. Larvae mortality, development, and survival time were monitored and recorded after every 24 h until pupation. Emerging adults from pupa were recorded, and their sexes were identified. Results Pyriproxyfen increased Anopheles gambiae larvae mortality rates and larvae developmental time of first instar larvae to pupal at densities of 20, 40 and 60 larvae in forested area (p < 0.05). Also, the larvae survival time was found to be longer in forested area compared to deforested area (p < 0.05) except at the density of 20 larvae. Pyriproxyfen reduced larvae pupation rates by 88% in forested area and it had 100% adult emergence inhibition regardless of land cover type and pyriproxyfen concentration, except at the density of 60 larvae exposed to 0.03 ppm, where adult emergence rate of 6.7% was detected. Conclusion These findings suggest that, the efficacy of pyriproxyfen against Anopheles gambiae s.s. larvae and pupae is dependent on land cover types and its larvicidal effect can be increased by presence of trees canopy covers. Therefore, reviving forestry schemes and community afforestation programmes could have a positive impact on mosquito larval control by using larvicides. Also, increasing land canopy cover can be opted as a way to discourage the development and survival of potential malaria vectors.

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Goat performance on pure Andropogon gayanus pastures or associated with legumes

Cited by 2 publications

References 44 publications

Assessing the competitive ability of the invader Senna obtusifolia with coexisting natives species under different water stress regimes

Assessing the competitive ability of the invader Senna obtusifolia with coexisting natives species under different water stress regimes

Effect of pyriproxyfen on development and survival of Anopheles gambiae sensu stricto under forested and deforested areas

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