scholarly journals Comparative toxicity of botanical powders, diatomaceous earth, pirimiphos methyl, rice husk (powder and ash) against Callosobruchus maculatus (Fab.)

2018 ◽  
Vol 5 (11) ◽  
pp. 709-724
Author(s):  
M. O. Ashamo ◽  
A. I. Babalola ◽  
O. C. Ogungbite
Keyword(s):  
Weight Loss ◽  
Rice Husk ◽  
Diatomaceous Earth ◽  
Callosobruchus Maculatus ◽  
Rice Husk Ash ◽  
Adult Emergence ◽  
Small Scale ◽  
Comparative Toxicity ◽  
Grain Damage ◽  
Pirimiphos Methyl

This study was carried out to investigate the comparative toxicity of seeds of Piper guineense Schum & Thonn, Capsicum annum L., diatomaceous earth, pirimiphos-methyl dust, rice husk (powder and ash) against Callosobruchus maculatus (F.) in stored cowpea seeds. Toxicity test was carried out by exposing five pairs each of freshly emerged beetles to the substrate materials at the rates of 0.0, 0.1, 0.2, 0.3, 0.4 and 0.5 g/20 g of grains. The experiment conducted at ambient temperature of 28 oC + 2 oC and 75% + 5% relative humidity was replicated three times and arranged in a completely randomized design. Adult mortality was observed for four days. The following phytochemicals were observed in the materials: alkaloids, saponins, tannin, flavonoid and glycosides. Results of the toxicity assay revealed that rice husk ash was the most toxic to adult C. maculatus with 100% mortality (p < 0.05) within 72 h of exposure at a concentration of 0.1 g/20 g grains. Pirimiphos methyl gave a significantly high mortality of 76.67% at a concentration of 0.2 g/20 g of grains in cowpea after 72 h of application. The least efficacy was observed with rice husk powder evoking 3.33% at a dosage of 0.3 g/20 g in cowpea. The treated grains significantly reduced the oviposition and adult emergence of C. maculatus and were significantly different from the control in all the different dosages. Oviposition and adult emergence were lowest in rice husk ash with 8 eggs and 24.62% adult emergence in C. maculatus, at 0.5 g/20 g dosage. The percentage adult emergence in the untreated grains was significantly different (higher) (p > 0.05) from the emergence in the treated cowpea grains across the dosages. At all levels of dosages, the powders and ash significantly reduced weight loss, damage and weevil perforation index caused by the beetle. Rice husk ash at 0.5 g dosage recorded the lowest weight loss, grain damage and weevil perforation index of 0.40%, 1.95% and 5.80%, respectively. The findings from this research showed that rice husk ash was most potent/toxic to C. maculatus and its use could be encouraged especially in small scale storage.

scholarly journals Comparative response of Callosobruchus maculatus (Fab.) (Coleoptera: Chysomelidae) to Momordica charantia and Acalypha wilkesiana powders in stored cowpea (Vigna unguiculata) (Walp.)

2020 ◽  
Vol 14 (2) ◽  
pp. 224-230
Author(s):  
Oyewale Rufus Adeboye ◽  
Mercy Olayinka Oni ◽  
Jacobs Mobolade Adesina
Keyword(s):  
Weight Loss ◽  
Callosobruchus Maculatus ◽  
Adult Emergence ◽  
Dosage Level ◽  
Adult Mortality ◽  
Momordica Charantia ◽  
Small Scale ◽  
Cowpea Seeds ◽  
Plant Powders ◽  
Acalypha Wilkesiana

Post-harvest preservation of cowpea in developing countries has been a major challenge owing to Callosobruchus maculatus infestation. The study compares response of C. maculatus (F) to Momordica charantia and Acalypha wilkesiana powders in stored cowpea seeds under laboratory atmosphere. Five pairs of freshly emerged C. maculatus adults were introduced into Petri-dish containing 20 g of cowpea admixed with 0.2, 0.4, 0.6 and 0.8 g of each plant powder, replicated thrice and arranged in a complete randomization design. Adult mortality was recorded at 24 h interval for 5 days, oviposition was recorded after 48 h. While newly emerged insects were recorded 30-35 days after infestation and weight loss was also determined. The treatments showed significant increase in C. maculatus adult mortality as the time of exposure and dosage increases, with highest values (90 and 100% for A. wilkesiana and M. charantia, respectively) at 120 h of exposure and 0.8 g dosage level. At 0.8 g, A. wilkesiana (66.3) and M. charantia (63.0) treated seeds recorded significantly lower number of eggs laid. Similar trend was equally observed for adult emergence and percentage weight loss. The study revealed that both plants had significant insecticidal effects and clearly showed that M. charantia was more effective than A. wilkesiana, but did not show higher significant differences in all the parameters assessed. This indicated that these plant powders have prospective to safeguard cowpea seeds in store from C. maculatus infestation and damage. Therefore, these plant should be included in the Integrated Pest Management Strategies for cowpea storage by small scale farmers.

scholarly journals Manurial amendments and source of water for supplemental irrigation of sawah-rice system influenced soil quality and rice yield

Agro-Science ◽  
2021 ◽  
Vol 20 (1) ◽  
pp. 95-102
Author(s):  
A.L. Nnadi ◽  
V.U. Ugwu ◽  
J.C. Nwite ◽  
S.E. Obalum ◽  
C.A. Igwe ◽  
...  
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Spring Water ◽  
Mineral Fertilizers ◽  
Small Scale ◽  
Rice Grain ◽  
Southeastern Nigeria ◽  
Supplemental Irrigation ◽  
Husk Rice ◽  
Poultry Droppings

Soil and water management research on adapting the promising sawah ecotechnology for lowland rice farming in West Africa has largely focused on the abundant inland valleys; floodplains which too represent a huge agricultural resource in the region have not been so involved. Sawah refers to a bunded, puddled and leveled basin for rice, with water inlets and outlets for irrigation and drainage, respectively. In conventional sawah, soil fertility is augmented using mineral fertilizers, with an option to harness lowland water resources for use in small-scale irrigation to create the so-called sawah typologies. In this study, we evaluated the effects of three manurial amendments (rice husk, rice-husk ash and poultry droppings, each at 10 t ha–1) and NPK 20:10:10 at 400 kg ha–1 interacting with source of water (spring or pond) used for supplemental irrigation of three sawah typologies in a floodplain in southeastern Nigeria. Plots amended with poultry droppings and supplemented with spring water recorded the overall best performance of the sawah-rice system; the control being the unamended non-supplemented (solely rainfed) plots recorded the worst. Rice-husk ash and rice husk enhanced soil pH and soil organic carbon, respectively. The three sawah typologies showed a consistent trend thus spring-supplemented ≥ pond-supplemented ≥ non-supplemented sawah. Rice grain yield was influenced by soil total nitrogen and the sum of the three plant-nutrient basic cations (K+ , Ca2+ and Mg2+), with the influence of K+ alone being the greatest. To enhance rice performance including grain yields in floodplain sawah, farmers should utilise poultry droppings as soil manure and spring water for supplemental irrigation.

scholarly journals Synergetic effects of two botanical entomocides as pest-protectants in maize grains

2016 ◽  
Vol 89 (2) ◽  
Author(s):  
Kayode David Ileke ◽  
Jacobs Mobolade Adesina ◽  
Emmanuel Oluwaseun Obajulaye
Keyword(s):  
Weight Loss ◽  
Adult Emergence ◽  
Adult Mortality ◽  
Post Treatment ◽  
Sitophilus Zeamais ◽  
Economic Losses ◽  
Plant Products ◽  
Post Harvest ◽  
Synergetic Effects ◽  
Grain Damage

<em>Sitophilus zeamais</em> Motschulsky infestation causes severe post-harvest losses of cereal grains in Nigeria leading to major nutritional and economic losses. A laboratory study was conducted to determine the efficacy of <em>Myrcianthes fragrans</em> and <em>Aframomum melegueta</em> seed powders and methanol extract as well as their synergetic effects on <em>S. zeamais</em>. The ability of the plant products to protect maize grain against <em>S. zeamais</em> infestation was assessed in terms of mortality 24 to 96 h posttreatment, oviposition, and adult emergence, weight loss and grains damage. <em>M. fragrans</em> and <em>A. melegueta</em> products significantly cause adult mortality of <em>S. zeamais</em>. <em>M. fragrans</em> products were the most toxic as it evoked 100% adult mortality within 24 h of application while<em> A. melegueta</em> products evoked 100% mortality of <em>S. zeamais</em> at 48 and 72 h post treatment, respectively. The synergetic effects of the plant products caused 100% adult mortality at 48 and 72 h post-treatment, respectively. Oviposition, adult emergence, weight loss and damage of the maize grains treated with the plant products were completely inhibited compared with untreated grains. The results obtained revealed that 2 g and 2% sole application of <em>M. fragrans</em> and mixed application of <em>M. fragrans</em> and <em>A. melegueta</em> products were effective in controlling <em>Sitophilus zeamais</em> post-harvest infestation and grain damage and could serve as an alternative to synthetic insecticide in ensuring steady supply of maize grains, thus ensuring food security as the plants are of medicinal and nutritional quality.

scholarly journals Comparative Effects of Rice and Melon Wastes on Sitophillus Zeamais, Storage Pest of Maize Grains in Nigeria

2021 ◽  
pp. 114-123
Author(s):  
R. T. Olorunmota ◽  
T. I. Ofuya ◽  
J. E. Idoko ◽  
B. A. Ogundeji
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Insect Pests ◽  
Adult Emergence ◽  
Application Rates ◽  
No Weight Loss ◽  
Negative Effect ◽  
Males And Females ◽  
Maize Grain ◽  
Treatment Mortality

World’s calories supply from maize accounts for 20% but global postharvest grain loss caused by insect pests was estimated to be 10%. Control is mostly by synthetic insecticides with consequences such as insect resurgence and resistance and negative effect on non- target organisms. Maize grain losses to weevils are so enormous that effective local solution has to be sought. Thus this research aimed at assessing the effectiveness of powders and ash of rice husk and melon shell in controlling Sitophillus zeamais (Mots) in stored maize. Four treatments, Rice husk powder (RHP), Rice husk ash (RHA), Melon shell powder (MSP) and Melon shell ash (MSA) were applied at eight levels of 0 - 2.0 g 20 g-1 maize grain in three replicates. Five pairs (males and females) of freshly emerged S. zeamais were introduced into each treatment. Mortality test was carried out on the insects at 48 and 96 hours after introduction. Germination test was conducted on  ten randomly selected grains after weevil emergence. Significantly higher (p≤0.05) mortality was recorded in treated seeds than the control. Virtually 100% mortality of S. zeamais was attained in both RHA and MSA treated maize in 96hrs at all application rates. Mean adult emergence in maize treated with both RHA and MSA were zero, with no weight loss like those of grains treated with standard control of P. guinensis. Also maize grain treated with Rice husk ash (RHA) and Melon shell ash (MSA) recorded a mean WPI of zero irrespective of application rates as in P. guinensis. The mean percentage germination of maize grain was significantly higher (p≤0.05) in P. guinensis than those recorded on treatments, while germination of treated maize is higher than the control. Thus rice husk and melon shell are effective alternatives to insecticides against S. zeamais in stored maize.

scholarly journals Evaluation of the Susceptibility of the Seeds of Four Varieties of Vigna unguiculata against Callosobruchus maculatus Infestations

2019 ◽  
pp. 1-12
Author(s):  
Mala Tankam C. M. ◽  
Kekeunou Sevilor ◽  
Olina Bassala J. P. ◽  
Nukenine Nchiwan E.
Keyword(s):  
Weight Loss ◽  
Callosobruchus Maculatus ◽  
Agricultural Research ◽  
Negative Relationship ◽  
Growth Index ◽  
Adult Emergence ◽  
Physical Characteristics ◽  
Susceptibility Index ◽  
Cowpea Varieties ◽  
Index Weight

Introduction: Post-harvest conservation remains a major challenge for most crops in developing countries. Among these is Cowpea one of the major legumes grown and consumed in the tropics and subtropics of countries. Callosobruchus maculatus infestations constitute are the most prominent threat for this particular crop. Objective: The present research aimed at evaluating the susceptibility of four cowpea varieties against infestations of C. maculatus. Place and Duration of Study: The study was conducted at the entomology laboratory of the cowpea section of the Regional Center for Agricultural Research of Maroua from November to December 2018. Methodology: The experiments were carried out based on the factorial experiment by randomized complete design with five replications. 40 seeds of each variety were put in contact with 5 pairs of bruchids. Results: The results show that the four cowpea varieties evaluated have different physical characteristics of the seeds. This variability would play an important role in inducing the ovipositional response of C. maculatus females. However, it is not enough on its own to explain the various degree of susceptibility to C.maculatus infestations. There was a positive perfect correlation between the number of adult emergence, growth index, weight loss, number of holes and Dobie susceptibility index. Also, BR-1 was found to be more resistant to C. maculatus followed by Lori-niébé, Vya and least resistance was observed in the Borno brown. The multiple regression analysis reveals that there is a negative relationship between mortality rate of developmental stages, weight loss, F1 offspring production, and seed susceptibility. Conclusion: The physical characteristics of the four cowpea varieties tested to affect the susceptibility of the grain to beetle attacks. A number of adult emergence, growth index, weight loss, and susceptibility index are the main indicators for the resistance of cowpea to C. maculatus damage. An analysis of the amino acids contained in the BR-1 is recommended for the introgression of its resistance alleles in susceptible varieties.

scholarly journals Effects of Garlic Clove, Neem and Eucalyptus Leaf Extract on Mating Behaviour, Oviposition and Adult Emergence of Pulse Beetle, Callosobruchus maculatus

2014 ◽  
Vol 18 (2) ◽  
pp. 93-97 ◽  
Author(s):  
S Akter ◽  
N Nahar ◽  
M Rahman
Keyword(s):  
Weight Loss ◽  
Leaf Extract ◽  
Callosobruchus Maculatus ◽  
Mating Behaviour ◽  
Adult Emergence ◽  
Mating Frequency ◽  
Leaf Extracts ◽  
Mating Duration ◽  
Seed Damage ◽  
Pulse Beetle

Experiments were conducted in the laboratory to study the effects of garlic clove, neem and eucalyptus leaf extracts on mating behaviour, oviposition and adult emergence of pulse beetle, Callosobruchus maculatus. Intensity of seed damage and weight loss of gram seeds were also recorded. The results showed that the mating frequency, mating duration, oviposition, adult emergence of pulse beetle and weight loss of gram seeds were reduced significantly after application of the extracts. Among the extracts, neem leaf extracts showed lowest mating frequency (1), mating duration (3.66 minutes), lowest number of laid eggs (27.33), adult emergence (11.67), seed damage (6.89%) and weight loss (2.53%). On the other hand, garlic clove extract showed highest mating frequency (1.67), mating duration (4.67 minutes), highest number of laid eggs (40.33), adult emergence (18.66), seed damage (9.63%) and weight loss (3.73%). In the same way eucalyptus leaf extract showed 2nd highest mating frequency (1.5), mating duration (4.5 minutes), eggs laid (38.67), adult emergence (15.67), seed damage (9.25) and seed weight loss (3.33%). Considering efficacy of all extracts, it was found that the order of toxicity was neem leaf extract>eucalyptus leaf extract> garlic clove extract.DOI: http://dx.doi.org/10.3329/pa.v18i2.18164 Progress. Agric. 18(2): 93 - 97, 2007

Host Preference and Damage Assessment of Pulse Beetle, Callosobruchus maculatus (Fabricius) (Chrysomelidae: Coleoptera) on Different Hosts

2020 ◽  
Author(s):  
S. Ramesh Babu ◽  
S. V. S. Raju ◽  
P. S. Singh ◽  
Kamal Ravi Sharma
Keyword(s):  
Weight Loss ◽  
Damage Assessment ◽  
Host Preference ◽  
Callosobruchus Maculatus ◽  
Green Gram ◽  
Laboratory Conditions ◽  
Grain Damage ◽  
Pulse Beetle ◽  
Preferred Hosts

The host preference of pulse beetle, C. maculatus to selected host grains were evaluated under laboratory conditions in the Department of Entomology and Agricultural Zoology, Banaras Hindu University during the year 2018. Cowpea and green gram were most preferred hosts for C. maculatus in terms of oviposition, per cent survival and mean developmental periods. Red gram and soybean were comparatively less preferred host for oviposition (66.38 eggs/50 seeds and 69.00 eggs/50 seeds respectively) than other host grains. In terms of per cent grain damage (92.25%; 90.19%) and per cent weight loss of grains (76.27%; 75.92%) cowpea and green gram were most preferable hosts respectively after 120 days after insect inoculation.

scholarly journals Effects of Hypoxia on Acoustic Activity of Two Stored-Product Pests, Adult Emergence, and Grain Quality

2019 ◽  
Vol 112 (4) ◽  
pp. 1989-1996 ◽  
Author(s):  
Anastasia W Njoroge ◽  
Richard W Mankin ◽  
Bradley Smith ◽  
Dieudonne Baributsa
Keyword(s):  
Emerging Adults ◽  
Grain Quality ◽  
Callosobruchus Maculatus ◽  
Sitophilus Oryzae ◽  
Adult Emergence ◽  
Stored Grain ◽  
Acoustic Activity ◽  
Oxygen Levels ◽  
Post Exposure ◽  
Grain Damage

Abstract Modified atmospheres such as hermetic storage are widely used for the control of stored grain insect pests. To improve their effectiveness, there is need to better understand insect responses to low-oxygen environments. Adult Callosobruchus maculatus F. (Coleoptera: Chrysomelidae: Bruchinae) on cowpea and Sitophilus oryzae L. (Coleoptera: Curculionidae) on wheat were exposed to hypoxia treatments consisting of 1, 3, and 5% oxygen levels for 14 d. Acoustic activity was monitored during the experiment, and insect mortality and grain quality were examined immediately after the hypoxia treatments. Adult emergence was assessed 45 d post-treatment. All three hypoxia treatments eliminated acoustic activity of both species within 4 d. There was neither insect survival for both species nor significant grain damage immediately after 14-d exposure to hypoxia treatments. No adult insects emerged 45 d post-exposure on grains maintained at 1% oxygen level for 14 d. However, at 3 and 5% oxygen levels, there were eggs on cowpea, holes in wheat, and emerging adults for both insect species 45 d post-exposure. Although insect activity ceased within 4 d when hypoxia was maintained below 5%, there is need to explore exposure beyond 14 d for 3 and 5% oxygen levels, to ensure to avoid potential adult emergence from eggs and other insect life stages post-treatments. Maintaining 3–5% hypoxia conditions for a longer duration would ensure insufficient oxygen is available for progeny development.

scholarly journals Multivariate analysis on blackgram genotypes for bruchine (Callosobruchus maculatus F.) resistance towards selection of parental lines

2021 ◽  
Vol 13 (4) ◽  
pp. 1206-1213
Author(s):  
Ragul Subramaniyan ◽  
Manivannan Narayana ◽  
Iyanar Krishnamoorthy ◽  
Ganapathy Natarajan ◽  
Karthikeyan Gandhi
Keyword(s):  
Weight Loss ◽  
Multivariate Analysis ◽  
Seed Weight ◽  
Callosobruchus Maculatus ◽  
Principal Component ◽  
Adult Emergence ◽  
Black Gram ◽  
Seed Damage ◽  
Component Traits ◽  
Hybridization Programme

Black gram (Vigna mungo (L.) Hepper) is one of the most important pulse crops in daily diets. However, black gram production and post-harvest preservation are still tedious due to the losses caused by the storage pest bruchine, Callosobruchus maculatus (F.), both quantitatively and qualitatively.   Hence, the present study involves the utilization of the multivariate analysis by effectively understanding variation among the genotypes based on their level of bruchine infestation. The multivariate studies indicated that the traits viz., the total number of adult emergence (AE), seed damage % (SD) and seed weight loss % (SWL) had more variation and with more significant correlation among them.  Also, these traits are the most influential principal component traits governing 88% of the variation among genotypes. The divergence analysis showed that the genotype TU 68 found in cluster II would have the potential to create the variation for bruchine infestation among the black gram genotypes involved in the study.  As it has scored lesser adult emergence (AE) (7 adults), seed damage % (SD) (14 %) and seed weight loss % (SWL) (17.79 %)  than the other genotypes. It shows the resistant nature of the genotype against bruchine beetles. Hence, TU 68 could be utilized in the future hybridization programme as a donor for bruchine resistance.

scholarly journals Microstructure and Durability Properties of Lightweight and High-Performance Sustainable Cement-Based Composites with Rice Husk Ash

2021 ◽  
Author(s):  
Gökhan Kaplan ◽  
Mohamed A.Salem Elmekahal
Keyword(s):  
Mechanical Properties ◽  
Weight Loss ◽  
Compressive Strength ◽  
Greenhouse Gases ◽  
Rice Husk ◽  
High Performance ◽  
Rice Husk Ash ◽  
Drying Shrinkage ◽  
Environmental Damage ◽  
Sustainable Solutions

Abstract Sustainable solutions are investigated to reduce the environmental damage caused by greenhouse gases and CO2 emissions. Cement is a construction material responsible for greenhouse gases and CO2 emissions. Thus, CO2 emissions are reduced by using replacement materials such as rice husk ash instead of cement. This study investigated the durability and mechanical properties of lightweight and high-performance, sustainable cement-based composites. A foaming agent was used to reducing the unit weight of the mixtures. Also, pumice powder (PP) and rice husk ash (RHA) were used to improve cement-based composites' durability and mechanical properties. The density of mixtures varies between 1666–2205 kg/m3. The early age strength of the mixes using 12.5% RHA has increased. The mixtures' compressive strength (91-days) with 25% RHA and 50% PP was 46.6 MPa. As the PP content of mixes increased, drying shrinkage values increased. Expansions decrease as the initial compressive strength increases in mixtures exposed to sulfate. As RHA and PP's ratio increased, weight loss decreased in mixes exposed to HCl, while weight loss increased in mixes exposed to H2SO4. It was determined that the content of CH(OH)2 is important in mixes exposed to HCl, and impermeability is important in mixes exposed to H2SO4. It has been observed that the initial compressive strength is also important in mixes exposed to the freeze-thaw effect. As the foam content of the mixes increased, the compressive strength decreased while the drying shrinkage increased. As a result, using up to 25% RHA has increased the performance of cement-based composites.

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