Although companion plants are known to reduce the damage caused by insect pests, the role of their volatiles in repelling pests from target plants has been the subject of few investigations. To propose an alternative to chemical control, the repellency of 24 plant extracts was evaluated. Thripidae, has been observed on cowpea, vigna unguiculata. The treatments were laid in complete randomized block design with four replicates for two relay plantings in 2006. Pdf management of cowpea flower thrips, megalurothrips sjostedti. The flower bud thrips, megalurothrips sjostedti trybom thysanoptera. Field experiments were conducted for two seasons to evaluate the timing of application of the entomopathogenic fungus, metarhizium anisopliae for the control of legume flower thrips, megalurothrips sjostedti on cowpea. Field evaluation of horticultural mineral oils and botanicals. Trybom thysanoptera thripidae, is considered the first major pest attacking the reproductive structures of. Oct 06, 2020 background bean thrips, megalurothrips distalis karny, are a serious insect pest of mung bean grown in summer season as a catch crop in wheatrice cropping system in north west india.
To propose an alternative to chemical control, the repellency of 24 plant extracts was evaluated against adult female thrips of m. Importance of timing of application of the entomopathogenic fungus, metarhizium anisopliae for the control of legume flower thrips, megalurothrips sjostedti and its persistence on cowpea. The insect is commonly found in tropical africa and has been recorded to cause yield loss of up to 100%. Evaluation of cowpea mini core accessions for resistance. Insects free fulltext repellency of plant extracts. Alghali 1992 reported that in nigeria, yield loss of cowpeas was up to 75% when insects attacked during the flower budding and flowering stages, but only 23% when attack was during pod development. However, the crop suffers major damage and yield losses due to bean flower thrips, megalurothrips sjostedti trybom thysanoptera. Pengaruh insektisida nabati dan kimia terhadap hama thrips. Cowpea production is hindered by many biotic and abiotic factors, with the flower bud thrips, megalurothrips sjostedti trybom being the most damaging pest at flowering stage causing yield losses of 20 to 80%.
Management of insect pests in the production and storage. An megalurothrips sjostedti in uska species han insecta nga syahan ginhulagway ni filip trybom hadton 1910. Effect of temperature on germination, radial growth and. Megalurothrips usitatus bagnall thripidae was communicated by dr. Making a pdf file of a logo is surprisingly easy and is essential for most web designers. Screening of cowpeas for resistance to the flower bud thrips.
If your scanner saves files as pdf portbale document format files, the potential exists to merge the individual files into one doc. Introduction the bean flower thrips, megalurothrips sjostedti trybom thysanoptera thripidae, is considered the first major pest attacking the reproductive structures of. Megalurothrips sjostedti the cowpea flower thrips or african bean flower thrips are shiny, black, slender, smallwinged insects that feed on flower buds and flowers. Pdf biology and management of legume flower thrips. Sep 01, 2015 for instance, the bean flower thrips bft, megalurothrips sjostedti trybom 1908, can cause losses of 20100% to legume crops in africa singh and allen, 1980, rusoke and rubaihayo, 1994, edema and adipala, 1996, tamo et al. The animal diversity web team is excited to announce adw pocket guides. Cowpea is an important source of protein for people in africa. Sorokin for control of the legume flower thrips, megalurothrips sjostedti trybom on cowpea in kenya crop prot. Genetics of resistance of megalurothrips sjostedti in cowpea was studied, field trial was conducted at savannah agricultural research institute sari, nyankpala, ghana, involving f1, f2, backcross populations and the five parental materials. Cowpea flower bud thrips megalurothrips sjostedti trybom by dr. Five flowers were randomly picked and thrips counted under a dissecting microscope.
Effect of intercropping cowpea with maize on the performance. Susceptibility of the legume flower thrips to metarhizium. To propose an a lternative to chemical control, the repellency of 24 plant extracts was evaluated against adult female thrips of m. Proceedings of the joint essa and aais conference, stellenbosch, south africa. Pdf is a hugely popular format for documents simply because it is independent of the hardware or application used to create that file. The bean flower thrips is the primary pest of cowpea, which is widely grown in subsaharan africa. An megalurothrips sjostedti in nahilalakip ha genus nga megalurothrips, ngan familia nga thripidae. Megalurothrips sjostedti taetsjoverview eppo global database. Species composition of thrips infesting chilli crop.
Effects of entomopathogenic nematodes, heterorhabditis. As addressed below, there is a dire need for pest control strategies that can have the greatest positive impact on improving the livelihoods of those that produce and consume. Varietal resistance is the most preferred, environmentally friendly, cost. Field evaluation of horticultural mineral oils and.
A series of experiments were conducted in cameroon to investigate options for managing cowpea flower thrips, megalurothrips sjostedti, via arbuscular. Depending on the type of scanner you have, you might only be able to scan one page of a document at a time. Dry grain pulses crsp fy 2011 workplans 121 the major pests of cowpea in the field in northern nigeria, niger, and burkina faso include. Kurang efektifnya bahanbahan nabati tersebut dalam menekan populasi thrips disebabkan oleh adanya senyawa azadirachtin, meliantriol, salanin, dan nimbin, yang merupakan hasil metabolit sekunder dari tanaman mimba, minyak atsiri dan oleoresin dari jahe, a llisin dan. Insects were exposed either to direct spray of the conidia or to fungustreated floral tissues. Megalurothrips sjostedti trybom, 1910 espesye sa insekto nga una nga gihulagway ni filip trybom ni adtong 1910 ang megalurothrips sjostedti. In 2003, the results showed that ith 9820 and tvu 1509 resistant control supported significantly p megalurothrips sjostedti, in replicated field trials. Pod damage due to thrips was also rated on ten randomly harvested pods. Megalurothrips usitatus bagnall merupakan salah satu hama penting kacang hijau pada musim kemarau. Damage was assessed when the crops were 30 days after planting dap. Three key factors assumed to be responsible for its pest status are analysed, the survival on alternative hostplants during the dry season, the inefficient biotic mortality factors regulating population growth, and the effect of larval feeding on the development of cowpea flower buds. Assessing the impact of varietal resistance and planting. Pdf ecological niche modeling to predict effect of. Megalurothrips sjostedti and frankliniella occidentalis thysanoptera.
To combine pdf files into a single pdf document is easier than it looks. Evaluation of cowpea accessions for resistance to flower bud thrips megalurothrips sjostedti in. Identification of resistance cultivars of cowpea vigna. Adobe designed the portable document format, or pdf, to be a document platform viewable on virtually any modern operating system. Behavioural responses of bean flower thrips megalurothrips. How to shrink a pdf file that is too large techwalla. This objective will lay the foundation for the field knowledge that we will need to develop integrated pest managementomics ipmomics strategies for these aforementioned five pest species. The crop is produced by small holder growers in farm. In 2003, the results showed that ith 9820 and tvu 1509 resistant control supported significantly p megalurothrips sjostodti. Control of flower bud thrips in the field is difficult due to its cryptic behaviour.
During flower formation, the crop is attacked by thrips like megalurothrips sjostedti which prevents the formation of seeds. Bruchid weevils likecallosobruchus maculatus, on the other hand, destroy the seeds following harvest. Repellency of plant extracts against the legume flower. Repellent activity of cymbopogon citratus and tagetes minuta. Following its current status as a minor crop, only very few researches have been undertaken in its production especially as it relates to insect control.
Quincy, florida and later confirmed by dpi taxonomists based on two males and a female examined under compound microscope, and dna barcode sequences from four individuals. Megalurothrips sjostedti short rain season populations on ten cowpea varieties from middecember 1978 to midjanuary, 1979. Luckily, there are lots of free and paid tools that can compress a pdf file in just a few easy steps. Pdf aggregation of the bean flower thrips, megalurothrips sjostedti trybom thysanoptera. Biological foundations for management of field insect pests. Legume flower thrips, megalurothrips sjostedti, is a serious insect pest of leguminous plants particularly cowpea. Sternal gland structures in males of bean flower thrips. A comparison between african and asian populations a thesis submitted to the department of crop science of the faculty of agriculture, university of ghana, legon in partial fulfillment of the requirements for the degree of doctor of philosophy in crop science entomology by khady diop. This was done using randomized complete block design rcbd and completely randomized design crd. By michelle rae uy 24 january 2020 knowing how to combine pdf files isnt reserved.
General information about megalurothrips sjostedti taetsj eppo global database. Read on to find out just how to combine multiple pdf files on macos and windows 10. Physothrips sjostedti trybom physothrips sjuestedti trybom taeniothrips sjoestedti trybom taeniothrips sjostedti trybom taeniothrips sjuestedti trybom common names. Thripidae in pepper flowers ignacio baez, 1stuart r. Behavior predation by orius insidiosus heteroptera. Megalurothrips sjostedti taetsjoverview eppo global. Legume flower thrips, megalurothrips sjostedti, is a serious insect pest of leguminous plants particularly. The objective of this study was to identify sources of. The susceptibility of megalurothrips sjostedtito metarhizium anisopliae when reared on susceptible, tolerant, and moderately resistant varieties of cowpea at different constant temperatures was evaluated in the laboratory. Abstract flower thrips, frankliniella occidentalis pargande and megalurothrips sjostedti trybom thysanoptera. Pdf legume flower thrips, megalurothrips sjostedti, is a serious insect pest of leguminous plants particularly cowpea. Mar 01, 2008 sorokin for control of the legume flower thrips, megalurothrips sjostedti trybom on cowpea in kenya crop prot.
Megalurothrips sjostedti rlavandulyl 3methylbutanoate ad, v ag 20 rlavandulol ad, v ag 20 megalurothrips usitatus e,efarnesyl acetate ad, v ag 17 thrips palmi rlavandulyl 3methyl3butenoate ad, v ag 1 phlaeothripidae. Genetic analysis of resistance to flower bud thrips megalurothrips sjostedti in cowpea vigna unguiculata l. The field study was conducted during the planting season of cowpea to evaluate the natural toxicant from tephrosia vogelii and petiveria alliacea and their mixture. Effect of temperature on germination, radial growth and virulence of metarhizium anisopliae and beauveria bassiana on megalurothrips sjostedti. Theimpactofdifferent densities 0,1, 2, 6, and10 of lst instar larvaeofm. The infestation of the plant by flower thrips megalurothrips sjostedti has been recorded as the major causes of low yield of the crop. Cowpea is a widely cultivated and major nutritional source of protein for many people that live in west africa.
Once youve done it, youll be able to easily send the logos you create to clients, make them available for download, or attach them to emails in a fo. Genetics of thrips megalurothrips sjostedti resistance in cowpea vigna unguiculata l. Genetics of thrips megalurothrips sjostedti resistance in. A pdf file is a portable document format file, developed by adobe systems. Assessment of key factors responsible for the pest status. Plant extracts in ethanol were separately applied on a filter paper disk in a still air.
Flower thrips, frankliniella occidentalis pargande and megalurothrips sjostedti trybom thysanoptera. This article explains what pdfs are, how to open one, all the different ways. Diurnal population trends of megalurothrips sjostedti and. Severe incidence leads to flower shedding and fewer pods leading to loss in grain yield. Jun 26, 2015 megalurothrips sjostedti trybom is an important pest of cowpea vigna unguiculata l.
Megalurothrips sjostedti trybom is an important pest of cowpea vigna unguiculata l. Importance of timing of application of the entomopathogenic. Pdf a series of experiments were conducted in cameroon to investigate options for managing cowpea flower thrips, megalurothrips sjostedti. Megalurothrips sjostedti dibandingkan dengan pestisida nabati.
Assessment of key factors responsible for the pest status of. Screening of cowpeas for resistance to the flower bud. A limited amount of work has been done to understand these insect pests in the areas that we propose to work. Various authors have noted that the timing of control sprays against m. Repellency of plant extracts against the legume flower thrips.
Megalurothrips sjostedti long rains season populations on ten cowpea varieties from early june to midjuly, 1979 15 table iii. Development of reference transcriptomes for the major. Mortality was significantly higher on the moderately resistant variety at all. Thripidae, is an economically important pest of cowpea in sub. Management of cowpea flower thrips, megalurothrips sjostedti. Pdf characterization of maleproduced aggregation pheromone. This means it can be viewed across multiple devices, regardless of the underlying operating system. There were 7 species of thrips in chilli plantation in the region of jambi and they were t. Summary thesystem analysis approach has beenused to study the influence of the bean flower thrips, megalurothrips sjostedti trybom thysanoptera, thripidae, on the yield formation of cowpea, vigna unguiculata walpers leguminosae, fabaceae. Complete crop failure may occur where insecticide protection is not introduced especially for. Cowpea production is constrained by a complex of insects throughout its life cy cle and also during seed storage. Evaluation of companion crops for thrips thysanoptera.
Annual yields and longevity of grain storage is greatly reduced by feeding damage caused by a complex of insect pests that include the pod sucking bugs, anoplocnemis curvipes fabricius hemiptera. Resistance was evaluated by measuring differences in populations and visual damage on the cultivars. Seventeen cowpea cultivars were screened for resistance to the flower bud thrips, megalurothrips sjostedti trybom in field trials during 2003 and 2004. Ademographic canopymodel wasdeveloped for a photosensitive cowpea variety, whose growth and development is driven by temperature, solar. Pdf repellency of plant extracts against the legume.
Thrips are major pests of peanut arachis hypogaea l. Evaluation of cowpea mini core accessions for resistance to. Megalurothrips and undergoes gradual type of metamorphosis in. Characterization of maleproduced aggregation pheromone. Yield was little affected by insect attack during the foliage growth stage. Megalurothrips sjostedti and frankliniella occidentalis adults thrips and larvae was recorded in those plots treated with z.
Pdf repellency of plant extracts against the legume flower. Anthocoridae on life stages and species of frankliniella flower thrips thysanoptera. If your pdf reader is displaying an error instead of opening a pdf file, chances are that the file is c. Although companion plants are known to reduce the damage caused by insect pests, the role of their volatiles in repelling pests from target. Management of cowpea flower thrips, megalurothrips.
I paid for a pro membership specifically to enable this feature. Thripidae are ranked as major pests among the arthropod pests of french beans phaseolus vulgaris l. Studies on population dynamics, seasonal incidence and. Field experiments were conducted to assess the combined effects of intercropping cowpea with maize and the application of metarhizium anisopliae mets. Bean flower thrips megalurothrips sjostedti is a key pest of cowpea vigna unguicalata in africa. Genetics of thrips megalurothrips sjostedti resistance. Ecological niche modeling to predict effect of climate change on the geographic distribution of the legume flower thrips megalurothrips sjostedti thysanoptera. Pdf file or convert a pdf file to docx, jpg, or other file format. Megalurothrips sjostedti and frankliniella occidentalis. Phlaeothripinae apelaunothrips consimilis hexadecene ad, d 29 heptadecene ad, d 29. Megalurothrips sjostedti trybom is an important pest of cowpea vigna unguiculata in west africa. It attacks cowpea from preflowering to flowering stages. An oversized pdf file can be hard to send through email and may not upload onto certain file managers.
P1uiuc1 biological foundations for management of field. Characterization of maleproduced aggregation pheromone of. Most electronic documents such as software manuals, hardware manuals and ebooks come in the pdf portable document format file format. Thripidae and their natural enemies on french bean phaseolus vulgaris fabaceae j. Plant extracts in ethanol were separately applied on a filter paper disk in a still air visual cue olfactometer. Serangan thrips pada awal pertumbuhan vegetatif dicirikan dengan gejala keriting. Twenty randomly tagged stands in the 2 central cowpea rows, were inspected each for m. Searching for a specific type of document on the internet is sometimes like looking for a needle in a haystack. Pdf genetic engineering in cowpea vigna unguiculata. Berdasarkan hasil penelitian, kehilangan hasil kacang hijau akibat serangan thrips berkisar antara 1264%, tergantung varietas, umur tanaman dan musim. Three key factors assumed to be responsible for its pest status are analysed, the survival on alternative hostplants during the dry season, the inefficient biotic mortality factors regulating population growth. Dry grain pulses crsp fy 2012 workplan and budget piiuiuc1.
1056 293 816 1105 556 805 1440 1067 468 304 1618 947 1104 117 538 786 1798 1353 767 1120 1702 1676 787 887 1588 967