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Hassan Sule

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Papers by Hassan Sule

Abundance and Dispersion Indices of Helicoverpa armigera (Lepidoptera: Noctuidae) on Tomato Plant in Nigeria

Deleted Journal, Feb 7, 2024

Helicoverpa armigera is among the major insect pests that pose a threat to tomato production in N... more Helicoverpa armigera is among the major insect pests that pose a threat to tomato production in Nigeria with an insufficient understanding of its population parameters, and available environmentally friendly control materials which are essential for the development of reliable and sustainable management strategies that can minimize the frequent use of synthetic pesticides; which are hazardous to the environment, non-target organism, and humans. The present study was conducted with the objectives of establishing population abundance and dispersion of H. armigera. Surveys were conducted in the savannah agroecological zone of Nigeria through fortnightly field visits to tomato farms from July to September 2019 (rainy season), and month of December 2019 to March 2020 (dry season), making a total of seven (7) and Nine (9) visits respectively. Ten plants were randomly selected and tagged from each farm, for observation of the presence of H. armigera larvae on the upper and lower parts early in the morning (6:00-7:30 am) on all sampling. Numbers found on each plant were counted and recorded with dates. Data obtained were subjected to analysis of variance and the least significant difference (LSD) at 0.05% level of probability was used to separate significant means. Data were further used in calculating the various dispersion indices. The result indicates that H. armigera was higher at 8 weeks after planting and aggregated on the upper part of the plant with a higher population in the dry season. Abundance and dispersion indices of H. armigera on tomato plants reported in this study will provide for appropriate decision-making in designing eco-friendly management of the pest.

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

Ecological studies of Asian citrus psyllid Diaphorina citri Kuwayama (hemiptera: psyllidae) and its parasitoid Tamarixia radiata Waterston (hymenoptera: eulophidae) on citrus 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 ...

©2009 Academic Journals

Effect of variety and intercropping on two major cowpea [Vigna unguiculata (L.) Walp] field pests

Survey of Weeds on Irrigated Farms in Mubi Area, Semi -Arid Ecology, Nigeria

A survey was carried out on the weed management practices used by farmers in irrigated farming in... more A survey was carried out on the weed management practices used by farmers in irrigated farming in Mubi area (10 0 15' N , 13 0 5' E) in the semi-arid ecology of Nigeria. twenty farms were selected from four sampled villages (Muchalla, Muvur, Wuro-Gude and Hurida), where irrigated farming is practiced. Questionnaires were administrated to farmers; in addition ,oral interview was conducted. Results of theSurvey has shown that classification of weed species in the area based on life cycle has revealed that annual weeds had the highest number of species (73%) followed by perennials (23%) and annuals/perennials (3.8%). With respect to morphology, grasses gave the highest number of species (46.2%) followed by broad leaves (42.3%), and the least sedges (11.5%). The highest weed species density (153.2/m 2) was exhibited byCyperus tuberosus followed by Cyperus esculentus (146.2/m 2). The highest weed infestation at the irrigated farms (479.2weeds/m 2) was recorded at Wuro-Gude.

Dispersion pattern and sampling of Diaphorina citri kuwayama (Hemiptera:Psylidae) populations on Citrus suhuiensis Hort. ex Tanaka in Padang Ipoh Terengganu, Malaysia

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...

Effect of Plant Product, Application Rates and Grain Type on the Control of Red Flour Beetle Tribolium castaneum Herbst (Coleoptera: Tenebrionidae) on Stored Millet (Pennisetum glaucum (L.) R.Br.)

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...

Doruwa (Parkia biglobosa) fruit husk and hyptis (Hyptis spicigera) leaves for controlling root-knot nematodes (Meloidogyne incognita) in tomato (Lycopersicon esculentum Mill C.V.)

Journal of Tropical Agriculture, 2006

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

DYNAMICS AND DISTRIBUTION OF Diaphorina citri (Hemiptera:Psyllidae) IN A CITRUS ORCHARD IN TERENGGANU, MALAYSIA

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...

Parasitism rate, host stage preference and functional response of Tamarixia radiata on Diaphorina citri

International Journal of Agriculture and Biology, 2014

The Asian citrus psyllid Diaphorina citri (Kuwayama) (Hemiptera: Psyllidae), is a serious pest an... more The Asian citrus psyllid Diaphorina citri (Kuwayama) (Hemiptera: Psyllidae), is a serious pest and main threat to citrus production worldwide. The present study was carried out to assess the performance of T. radiata, as biological control agent of D. citri , under insectary condition. The result shows T. radiata , to preferred late (4 th and 5 th ) instar nymphs than early (1 st , 2 nd and 3 rd ) instar nymphs of D. citri , with mean parasitism rate of 0%, 0%, 43.3%, 76.9% and 86.0% for 1 st , 2 nd , 3 rd , 4 th and 5 th instar nymphs respectively. The binomial logistic regression analysis of D. citri nymphs attacked by T. radiata, as a function of host ( D. citri nymphs) density offered, shows T. radiata, to display a functional response type II with attack rate of 39.99 and 34.04, and handling time of 0.60 and 0.71 for 4 th and 5 th instar nymphs of D. citri respectively. © 2014 Friends Science Publishers

Biocidal Activities of Seed Oils of Jatropha curcas and Moringa oleifera on Development of African Maize Stalk borer, Busseola fusca Fuller (Lepdoptera: Pyralidae)

Nigerian Journal of Entomology

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...

Pesticide Utilization and Associated Health Hazards in Kano Metropolis

Singapore Journal of Scientific Research

Infestation and Damage by Caryedon serratus (Olivier) Weevil on Stored Tamarindus indica (Linneaus) Fruits in Kano State, Nigeria

Asian Journal of Advanced Research and Reports

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...

Evaluation of groundnut (Arachis hypogaea L.) advanced breeding lines for resistance to cercospora leaf spots and rust diseases in Kano State, Nigeria

Nigerian Journal of Biotechnology

Cercospora leaf spots and rust diseases are among the biotic factors that cause yield reduction i... more Cercospora leaf spots and rust diseases are among the biotic factors that cause yield reduction in groundnut. However, screening groundnut breeding lines that are tolerant to these diseases and having higher yield potentials would help farmers and breeders to make the right choice for cultivation or for further improvement. Therefore, this study was conducted to evaluate 18 groundnuts advanced breeding lines and 2 improved/local varieties against these diseases, during July-October 2016 rainy season in a field designated as endemic to Cercospora leaf spots and rust diseases, at the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) Research Farm at Minjibir, Kano, Nigeria. Significant differences (p<0.01) were observed in all the traits studied (viz., days to 50% flowering, normalised difference vegetation index, pod yield (Kg/ha), fodder yield (Kg/ha), 100 seed weight (g), disease incidence (%) and disease severity) except chlorophyll content. The top nine (9) high yielding breeding lines (

Occurrence and Damage Severity of Cassava Pest and Diseases in Tanzania

International Journal of Agriculture Environment and Bioresearch

Surveys were conducted during 2015 and 2016 dry seasons in three major cassava producing zones of... more Surveys were conducted during 2015 and 2016 dry seasons in three major cassava producing zones of Tanzania. The studies aimed at establishing the incidence and damage severity of cassava green mite (CGM), cassava mosaic disease (CMD) and cassava brown streak disease (CBSD) on popular cassava varieties. Five districts were chosen in the Lake zone and two districts each from Southern and Eastern zones, to a total of nine districts. Results revealed that M. tanajoa incidence and damage severity were higher in 2015 compared to 2016 and also higher in the Lake zone while Eastern zone recorded the lowest. Younger cassava plants (<6 months) were most attacked by the mites. Cassava varieties, Lufaili, Kachaga, Kufanganya and Naliendele recorded higher damage with the lowest by Var. Ismaili in both years. Moreover, the diseases incidences and severities were higher in 2015 compared to 2016; Southern zone recorded the highest CMD incidence and severity with the least in the Lake zone while higher CBSD incidence and severity were recorded in the Lake zone. More so, altitude and Cassava + cowpea and cassava + cashew inter crops had influenced the incidence and severity of CBSD. Environmental factors especially temperatures played an important role to the distribution of the diseases. Farmers should be sensitized to plant cassava early to escape M. tanajoa attack and there is need for in-depth screening of the popular cassava varieties to come up with resistant cultivars to M. tanajoa, CMD and CBSD as well as their promotion across the country.

Tropical Agricultural Science

DYNAMICS AND DISTRIBUTIONOF Diaphorina citri (Hemiptera: Psyllidae) IN A CITRUS ORCHARD IN TERENGGANU, MALAYSIA

Population fluctuation of Diaphorina citri was monitored once every four week for a period of sev... more

Alien invasion

Parasitism rate, host stage preference and functional response of Tamarixia radiata on Diaphorina citri

The Asian citrus psyllid Diaphorina citri (Kuwayama) (Hemiptera: Psyllidae), is a serious pest an... more The Asian citrus psyllid Diaphorina citri (Kuwayama) (Hemiptera: Psyllidae), is a serious pest and main threat to citrus production worldwide. The present study was carried out to assess the performance of T. radiata, as biological control agent of D. citri, under insectary condition. The result shows T. radiata, to preferred late (4 th and 5 th) instar nymphs than early (1 st , 2 nd and 3 rd) instar nymphs of D. citri, with mean parasitism rate of 0%, 0%, 43.3%, 76.9% and 86.0% for 1 st , 2 nd , 3 rd , 4 th and 5 th instar nymphs respectively. The binomial logistic regression analysis of D. citri nymphs attacked by T. radiata, as a function of host (D. citri nymphs) density offered, shows T. radiata, to display a functional response type II with attack rate of 39.99 and 34.04, and handling time of 0.60 and 0.71 for 4 th and 5 th instar nymphs of D. citri respectively.

Diversity and relative Distribution of Honeybees Foraging Plants in some selected Reserves in Mubi Region, Sudan Savannah Ecological zone of Nigeria

pelagiaresearchlibrary.com

... Nigeria Abdullahi G *1 ., Sule H 1 ., Chimoya IA 2 , and Isah, M. D 3 . 1 ... 1990). They pro... more