Invasive alien species (IAS) are organisms accidently or deliberately introduced into a natural e... more Invasive alien species (IAS) are organisms accidently or deliberately introduced into a natural environment where they are not normally found. Introduced species threatens the environment, economy, society and human health. Recently, a few IAS were found to threaten the Malaysian fruit and vegetable industries. The Asian citrus psyllid, Diaphorina citri (Hemiptera: Psyllidae), is a sap-sucking pest of limau madu (Citrus sinensis (Linnaeus) Osbeck). Infestation causes defoliation and dieback leading to dwarfing. Diaphorina citri is also a vector for Candidatum liberibacter asiaticus which causes the Citrus Greening Disease. Recently, Tamarixia radiata Waterston (Hymenoptera:Eulophidae) was found parasitizing D. citri nymphs in Malaysia
Production of citrus worldwide is being threatened by an invasive pest Diaphorina citri Kuwayama,... more Production of citrus worldwide is being threatened by an invasive pest Diaphorina citri Kuwayama, (Asian citrus psyllid) which is regarded as the most important and efficient vector of bacterium, Liberobacter asiaticum that causes citrus greening disease. The prime concern in increasing production of all citrus fruits is the obstacles posed by the invasive psyllid,D. citri, and lack of sufficient understanding of its population parameters and dynamic, which are essential for development of reliable prediction system and management strategies. The present study was conducted with the objectives of establishing life table and demographic parameters of D. citri, its seasonal fluctuations and dispersion, feeding, oviposition behaviour,parasitism rate and nymphal preference of Tamarixia radiata. Life table studies, choice and no choice assays and parasitism studies were conducted at the insectary of Universiti Putra Malaysia. While population sampling was carried out at Padang Ipoh, Ulu ...
Pertanika journal of tropical agricultural science, 2012
An understanding of the dispersion patterns of a pest is an important pre-requisite for developin... more An understanding of the dispersion patterns of a pest is an important pre-requisite for developing an effective pest management program. In this study, fifty five (55) citrus trees were surveyed for adult Diaphorina citri once every four week for a period of ten months (March 2011 – December 2011). Analysis of spatialdistribution pattern using various indices of dispersion and regression models showed that D. citri exhibited an aggregated distribution on Citrus suhuiensis. Taylor’s power law ( a = 0.897, b = 1.267, R 2 = 0.74) fitted the data better than Iwoa’s regression modal (α = 0.376, β = 0.196, R 2 = 0.409). The optimal sample sizes needed for fixed precision levels of 0.10, 0.15 and 0.25 were estimated using Taylor’s regression coefficients, and the required sample sizes increased dramatically with increased levels of precision. Therefore, these sampling-plan presented should serve as a tool for an efficient estimation of D. citri population density in citrus orchard for pest...
The experiment was conducted at the Crop Protection Laboratory of Adamawa State University, Mubi,... more The experiment was conducted at the Crop Protection Laboratory of Adamawa State University, Mubi, Adamawa State, Nigeria. The objectives of the research were to evaluate the efficacy of leaf powders of six plants, compare their effectiveness with the a synthetic insecticide (pirimiphos-methyl) and determine the most effective application rates for controlling Tribolium castaneum in stored millet grain (Variety-Sosat). The leaf powders of the plants and the pirimiphos-methyl dust were tested at 2.5 g, 5.0 g and 7.5 g/25 g of sound and broken millet grain. The experiment was laid in a completely randomized design and each treatment was replicated three times. The result show that plants leaf powders and pirimiphos-methyl dust treatments were significantly higher than control. Pirimiphos-methyl dust caused significantly higher adult mortality of 3.17 adults at 22 hours after treatment (HAT) and 1.83 adults which was comparable to mortalitycaused by sugar apple at 72 hours after treatme...
A pot culture study to determine the efficacy of a mixture of dried and pulverized Parkia biglobo... more A pot culture study to determine the efficacy of a mixture of dried and pulverized Parkia biglobosa fruit pulp and Hyptis spicigera leaves for controlling root-knot nematode in tomato ‘Roma King’ was carried out at Mubi, Adamawa State (Nigeria) between June to December 2004. Tomato plants inoculated with Meloidogyne incognita eggs and grown on media containing 10, 20, 30, 40, and 50 g of the mixture per pot (5 kg soil) had significantly (p
Population fluctuation of Diaphorina citri was monitored once every four week for a period of sev... more Population fluctuation of Diaphorina citri was monitored once every four week for a period of seventeen months from March 2011 – July 2012, in a pesticide free citrus orchard. High number of adult D. citri were found on the upper canopy, north cardinal point and leaves growth stage 1. D. citri adults and immatures were found on C. suhuinensis on all sampling dates, except in the months of December, 2011 and January and May 2012, for immatures. Peak population of D. citri adults were found in months of March and June in both years, while in immatures peak populations were identified in the months of July, 2011 and March, 2012. Correlation analysis of D. citri adults and immatures with flush growth leaves and weather parameters shows adult D. citri population to correlate with number of flush leaves (r = 0.93) and temperature (r = 0.45). While immature D. citri population only correlated with flush leaves. Findings of these study give an insight into dynamics of D. citri populations i...
Laboratory experiment was conducted at the Department of Crop Protection Laboratory, Faculty of A... more Laboratory experiment was conducted at the Department of Crop Protection Laboratory, Faculty of Agriculture, Bayero University, Kano, in order to assess the effect of oils obtained from the seeds of Jatropha curcas and Moringa oleifera on African Maize Stalk Borer (Busseola fusca Fuller). The effects of the plant seed oils on larvae mortality, pupae and adult emergence were tested on freshly cut leaves/stem of maize 3-4 cm long) and treated with the prepared plant oils at various concentrations (10, 20, and 30%) and control (0%). The experiment was laid out in a completely randomized design and replicated four times. The results showed that both plant seeds oils were lethal to the developmental stages of B. fusca, causing mortality (21%) to the larvae, and subsequently preventing and/or suppressing pupae (2.08) and adult emergence (1.95). Treatment at 30% concentration was found to be more lethal to all the developmental stages of the test insect. Based on the findings of this study...
A survey was conducted on the infestation and damage of Caryedon serratus on stored tamarind pods... more A survey was conducted on the infestation and damage of Caryedon serratus on stored tamarind pods from September to November, 2014 in three local government areas (Doguwa, Gezawa and Kano Municipal) of Kano State in Nigeria. Structured questionnaires were randomly administered to 60 respondents. A total of 27 samples of tamarind pods were purchased for damage analysis. Descriptive statistics were used to analyze the collected data while ordinary least square Regression was used on damage data. Results obtained indicated that un-elevated room storage (in woven sacks) was the preferred (48.3%) form of tamarind storage practiced (91.7%), mostly for a period of 1 – 3 months (60%) of storage before being sold out. More so, about 98.3% of the respondents were aware of C. serratus as pest of tamarind pods. The pods are commonly attacked by such pest (48.3%) from inception to about 3 months of storage leading to highest damage levels (36.7%). The regression analysis revealed that the numbe...
... Nigeria Abdullahi G *1 ., Sule H 1 ., Chimoya IA 2 , and Isah, M. D 3 . 1 ... 1990). They pro... more ... Nigeria Abdullahi G *1 ., Sule H 1 ., Chimoya IA 2 , and Isah, M. D 3 . 1 ... 1990). They produce honey which is man's sweetest food (Adjare, 1990) and a balanced nutritious food having medicinal value (Rahman, 2006). Apart ...
Invasive alien species (IAS) are organisms accidently or deliberately introduced into a natural e... more Invasive alien species (IAS) are organisms accidently or deliberately introduced into a natural environment where they are not normally found. Introduced species threatens the environment, economy, society and human health. Recently, a few IAS were found to threaten the Malaysian fruit and vegetable industries. The Asian citrus psyllid, Diaphorina citri (Hemiptera: Psyllidae), is a sap-sucking pest of limau madu (Citrus sinensis (Linnaeus) Osbeck). Infestation causes defoliation and dieback leading to dwarfing. Diaphorina citri is also a vector for Candidatum liberibacter asiaticus which causes the Citrus Greening Disease. Recently, Tamarixia radiata Waterston (Hymenoptera:Eulophidae) was found parasitizing D. citri nymphs in Malaysia
Production of citrus worldwide is being threatened by an invasive pest Diaphorina citri Kuwayama,... more Production of citrus worldwide is being threatened by an invasive pest Diaphorina citri Kuwayama, (Asian citrus psyllid) which is regarded as the most important and efficient vector of bacterium, Liberobacter asiaticum that causes citrus greening disease. The prime concern in increasing production of all citrus fruits is the obstacles posed by the invasive psyllid,D. citri, and lack of sufficient understanding of its population parameters and dynamic, which are essential for development of reliable prediction system and management strategies. The present study was conducted with the objectives of establishing life table and demographic parameters of D. citri, its seasonal fluctuations and dispersion, feeding, oviposition behaviour,parasitism rate and nymphal preference of Tamarixia radiata. Life table studies, choice and no choice assays and parasitism studies were conducted at the insectary of Universiti Putra Malaysia. While population sampling was carried out at Padang Ipoh, Ulu ...
Pertanika journal of tropical agricultural science, 2012
An understanding of the dispersion patterns of a pest is an important pre-requisite for developin... more An understanding of the dispersion patterns of a pest is an important pre-requisite for developing an effective pest management program. In this study, fifty five (55) citrus trees were surveyed for adult Diaphorina citri once every four week for a period of ten months (March 2011 – December 2011). Analysis of spatialdistribution pattern using various indices of dispersion and regression models showed that D. citri exhibited an aggregated distribution on Citrus suhuiensis. Taylor’s power law ( a = 0.897, b = 1.267, R 2 = 0.74) fitted the data better than Iwoa’s regression modal (α = 0.376, β = 0.196, R 2 = 0.409). The optimal sample sizes needed for fixed precision levels of 0.10, 0.15 and 0.25 were estimated using Taylor’s regression coefficients, and the required sample sizes increased dramatically with increased levels of precision. Therefore, these sampling-plan presented should serve as a tool for an efficient estimation of D. citri population density in citrus orchard for pest...
The experiment was conducted at the Crop Protection Laboratory of Adamawa State University, Mubi,... more The experiment was conducted at the Crop Protection Laboratory of Adamawa State University, Mubi, Adamawa State, Nigeria. The objectives of the research were to evaluate the efficacy of leaf powders of six plants, compare their effectiveness with the a synthetic insecticide (pirimiphos-methyl) and determine the most effective application rates for controlling Tribolium castaneum in stored millet grain (Variety-Sosat). The leaf powders of the plants and the pirimiphos-methyl dust were tested at 2.5 g, 5.0 g and 7.5 g/25 g of sound and broken millet grain. The experiment was laid in a completely randomized design and each treatment was replicated three times. The result show that plants leaf powders and pirimiphos-methyl dust treatments were significantly higher than control. Pirimiphos-methyl dust caused significantly higher adult mortality of 3.17 adults at 22 hours after treatment (HAT) and 1.83 adults which was comparable to mortalitycaused by sugar apple at 72 hours after treatme...
A pot culture study to determine the efficacy of a mixture of dried and pulverized Parkia biglobo... more A pot culture study to determine the efficacy of a mixture of dried and pulverized Parkia biglobosa fruit pulp and Hyptis spicigera leaves for controlling root-knot nematode in tomato ‘Roma King’ was carried out at Mubi, Adamawa State (Nigeria) between June to December 2004. Tomato plants inoculated with Meloidogyne incognita eggs and grown on media containing 10, 20, 30, 40, and 50 g of the mixture per pot (5 kg soil) had significantly (p
Population fluctuation of Diaphorina citri was monitored once every four week for a period of sev... more Population fluctuation of Diaphorina citri was monitored once every four week for a period of seventeen months from March 2011 – July 2012, in a pesticide free citrus orchard. High number of adult D. citri were found on the upper canopy, north cardinal point and leaves growth stage 1. D. citri adults and immatures were found on C. suhuinensis on all sampling dates, except in the months of December, 2011 and January and May 2012, for immatures. Peak population of D. citri adults were found in months of March and June in both years, while in immatures peak populations were identified in the months of July, 2011 and March, 2012. Correlation analysis of D. citri adults and immatures with flush growth leaves and weather parameters shows adult D. citri population to correlate with number of flush leaves (r = 0.93) and temperature (r = 0.45). While immature D. citri population only correlated with flush leaves. Findings of these study give an insight into dynamics of D. citri populations i...
Laboratory experiment was conducted at the Department of Crop Protection Laboratory, Faculty of A... more Laboratory experiment was conducted at the Department of Crop Protection Laboratory, Faculty of Agriculture, Bayero University, Kano, in order to assess the effect of oils obtained from the seeds of Jatropha curcas and Moringa oleifera on African Maize Stalk Borer (Busseola fusca Fuller). The effects of the plant seed oils on larvae mortality, pupae and adult emergence were tested on freshly cut leaves/stem of maize 3-4 cm long) and treated with the prepared plant oils at various concentrations (10, 20, and 30%) and control (0%). The experiment was laid out in a completely randomized design and replicated four times. The results showed that both plant seeds oils were lethal to the developmental stages of B. fusca, causing mortality (21%) to the larvae, and subsequently preventing and/or suppressing pupae (2.08) and adult emergence (1.95). Treatment at 30% concentration was found to be more lethal to all the developmental stages of the test insect. Based on the findings of this study...
A survey was conducted on the infestation and damage of Caryedon serratus on stored tamarind pods... more A survey was conducted on the infestation and damage of Caryedon serratus on stored tamarind pods from September to November, 2014 in three local government areas (Doguwa, Gezawa and Kano Municipal) of Kano State in Nigeria. Structured questionnaires were randomly administered to 60 respondents. A total of 27 samples of tamarind pods were purchased for damage analysis. Descriptive statistics were used to analyze the collected data while ordinary least square Regression was used on damage data. Results obtained indicated that un-elevated room storage (in woven sacks) was the preferred (48.3%) form of tamarind storage practiced (91.7%), mostly for a period of 1 – 3 months (60%) of storage before being sold out. More so, about 98.3% of the respondents were aware of C. serratus as pest of tamarind pods. The pods are commonly attacked by such pest (48.3%) from inception to about 3 months of storage leading to highest damage levels (36.7%). The regression analysis revealed that the numbe...
... Nigeria Abdullahi G *1 ., Sule H 1 ., Chimoya IA 2 , and Isah, M. D 3 . 1 ... 1990). They pro... more ... Nigeria Abdullahi G *1 ., Sule H 1 ., Chimoya IA 2 , and Isah, M. D 3 . 1 ... 1990). They produce honey which is man's sweetest food (Adjare, 1990) and a balanced nutritious food having medicinal value (Rahman, 2006). Apart ...
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