The honeydew produced is deposited on the plants and encourages the growth of sooty moulds which restrict photosynthesis. It is large, light green, and found on almost all legumes. Thus, owing to the damage that insects craccivora is the most common. Ladybeetles species are widely distributed and control several aphid species, such as Aphis craccivora, Aphis fabae Scopoli, Aphis gossypii Glover, Brevicoryne brassicae (L.), Myzus persicae (Sulzer), and Rhopalosiphum maidis (Fitch), which cause serious crop damage (see Hodek and Honěk 1996). Walp.) Taxonomic placing: Insecta, Hemimetabola, Hemiptera, Sternorrhyncha, Aphidoidea, Aphididae.. Common name: Cowpea aphid.. Geographical distribution: Cosmopolitan; CIE Map # 99, 1983 (revised).. It is considered as one of the important pests of cowpea in Africa, Asia and Latin America (Jackai and Daoust, 1986). Feeding by silverleaf whitefly stunts plant growth and development; as a … AND PREDATORS ON FABA BEAN AND COWPEA IN NEWLY RECLAIMED AREAS IN EGYPT 1424 records in Egypt (El-Heneidy et al., 1998, El-Defrawi et al., 2000 , Abdel-Rahman et al., 2005) and in other countries such as Srikanth and Lakkundi, 1990 , Sharma and Yadav, 1994 in India and Kuroli et al., 1999 in Hungary, and indirect damage by It is by Brendan Wray. Black sooty mold grows over the honeydew, lowering the photosynthetic capacity of the plant. 2.8 Damages and losses caused by cowpea aphids (Aphis craccivora) 7 2.9 Aphid borne mosaic virus 8 2.10 Resistance of cowpea lines against cowpea aphids 8 2.11 Cowpea beetle ... 2.17 Damage and losses caused by bruchids 12 2.18 Host-plant resistance to insect pests of cowpea 12 The results indicated that all the botanical The aphid nymph on cowpea crop were worked out. Habitus. On an average, 20 nymphs per m row reduced the yield to the extent of 49 kg/ha and 79 kg/ha in 20102011 and 2011cropping season, respectively. Cowpea aphid, Aphis craccivora Koch is a polyphagous pest of cowpea that attacks the crop, feeding on all plant parts and leading to significant yield losses [10–12]. HYPPZ on line : Species (scientific name), Pests (common names), Glossary, Crops. The critical Aphis craccivora click for html version Summary: Cowpea aphids are shiny black with white and black legs. The honeydew produced is deposited on the plants and encourages the growth of sooty moulds which restrict photosynthesis. This species is found in medics, vetch and a ... aphid damage and will generally be able to tolerate far higher infestations than moisture stressed plants before a yield loss occurs. Key words: Aphis craccivora, Crop Pest, Entomopathogenic Fungi, median lethal concentration INTRODUCTION Cowpea aphid, Aphis craccivora (Koch) is a threat to cowpea growers in all over the country. Cowpea aphid (Aphis craccivora) Pea aphid (Acyrthosiphon pisum) Pest description and crop damage Pea aphid is the most common aphid on vetch. A. craccivora caused pod shrivelling at the young … known to be vectors of diseases of groundnut. Aphis craccivora. and Aphis craccivora (Hemiptera: Aphididae) Li-Yuan Cheng, Yan Zhang, Zhen-Zhen Chen & Yong-Yu Xu* ... causing serious damage (Singh & Van Emden 1979,Zhou etal. Whiteflies damage cole crops by sucking enormous quantities of sap and covering plants with sticky honeydew. On harming activity of groundnut aphid Aphis craccivora Koch. Aphis craccivora Koch. No specific permit was required for the described collection. They primarily cause damage either by direct feeding or by the transmission of plant viruses (Pickett et al., 1992). However, financial losses are not well recorded for any crop. Reference citations: Alimdzhanov R.A., Zhuravleva I.A. Due to heavy DAMAGE. Aphids ( Aphis craccivora Koch) are an important vegetative stage pest of cowpea in Africa. Aphis craccivora Koch (Homoptera: Aphididae), is one of the most widespread and destructive insect pests of cowpea and host-plant resistance is an effective approach to minimize the pest damage at seedling stage. The damage to yardlong bean by A. craccivora is caused by both adults and nymphs (Ofuya, 1997). 1996,Obopile&Ositile2010). A. craccivora is a common aphid species with agricultural importance in the United States. Cowpea aphid is small and dark, almost black. Aphis craccivora causes direct damage to plants by stunting and distorting growth. Cowpea aphid (Aphis craccivora Koch) is a major pest of cowpea (Vigna unguiculata L. It is important on food legumes, peanut (groundnut) and cowpea, in particular, but also on French beans (Phaseolus species) mungbean (and other Vigna species), pigeon pea, chickpea, alfalfa and several others. Female vivipara. Female vivipara. and causes tissue death, decay of the buttons and base of the stem, and stains in the flowers. In this report, we examine how the aphid Aphis craccivora Koch infests Catasetum sp. EILs for - -2012 . Both pests feed by sucking plant juice. Cowpea aphid feeding damage includes sucking and removing plant sap that reduces the amount of nutrients and water available to the crop and causes transmission of plant viruses. The damage is severe in drought situation when the crop is young. Some clones of Aphis craccivora are sufficiently toxic to the invasive and dominant predatory ladybird Harmonia axyridis to suppress it locally, ... Plants exhibiting aphid damage can have a variety of symptoms, such as decreased growth rates, mottled leaves, yellowing, stunted growth, curled leaves, browning, wilting, low yields and death. Direct feeding damage caused by inoculation of cowpea with A. craccivora, in a Chinese study, resulted in a reduction in plant height (to 41.9% of the controls), reduction in the green leaf area index from the 7th day after inoculation, and delayed production of harvestable pods by 30 days (Chang and Thrower, 1981). Although several aphid species may infest faba beans Aphis. It has been Aphis craccivora (APHICR) Menu. Damage. particularly in the drier regions of the tropics. from damage score indicated that a single dominant gene controlling cowpea resistance in IT82E-16. can cause major disruptions to disruptions to parts of the plant’s life cycle. and causes tissue death, decay of the buttons and base of the stem, and stains in the flowers. Image 5480852 is of cowpea aphid (Aphis craccivora ) adult(s). is considered to be the most important pest of yardlong bean and cowpea (Sarutayophat et al., 2007). Aphis craccivora Koch (BASF) Colony on alfalfa Aphis craccivora Koch (BASF) Colony and damage on bean To read this page in French . Aphis craccivora causes direct damage to plants by stunting and distorting growth. damage by various insect pests in the field (Benchasri and Bairaman, 2010). The use of resistant cultivars is among the best management option for this pest, but the success of this strategy is influenced by the stability of the resistant genotype to the cowpea aphid biotypes present in the major cowpea growing areas in a country. APHIS CRACCIVORA KOCH. Image 5480853 is of cowpea aphid (Aphis craccivora ) adult(s). aphid, Aphis craccivora Koch, is one of the most serious pests of legumes, such as faba bean, cowpea and pea [3]. Cowpea aphid (Aphis craccivora Koch.) were determined as 20 and 21 per m row and ETLs was at 15 and 15.75nymphs per m row in Both nymphs and adults suck plant sap and cause serious damage right from the seedling to pod bearing stage. Aphis craccivora colony was maintained on seedlings of fava bean in a growth chamber at 23°C with a photoperiod of 12: 12 (L: D) and 50% relative humidity. Key words: Vigna unguiculata, Aphis craccivora, SSR marker, RAPD, Marker-assisted selection, Anti-xenosis Introduction Yardlong bean and cowpea belong to Vigna unguiculata (L.) Walp, they are most widely used le-gume in the tropics. Megoura crassicauda is an oligophagous aphid which feeds selectively on Vicia plants such as The vector map of distribution of cotton and alfalfa within the territory of the Former Soviet Union has also been used for the correction of damage zones (Koroleva et al., 2003). Cowpea, Vigna unguiculata was infested at the young, mid‐fill and mature pod growth stages with, respectively, one, two and three pre‐reproductive adult apterae of Aphis craccivora per pod in a screen house. Aphis craccivora. Siphunculus. Aphis craccivora is one of the most common aphids in the tropics. Host plants: Polyphagous, with a preference for legumes.. Economic importance: The feeding of this aphid on clover and alfalfa causes plant wilting as well as … It causes direct damage by feeding, which may induce plant deformation and indirect damage caused either by honeydew or by transmission of viruses[4]. It damages the plants by direct feeding causing minimal damage unless they … It is by Brendan Wray. As part of an extensive and systematic programme to find genetic sources of resistance to Aphis craccivora, a major pest of cowpea, Vigna unguiculata, a total of 181 accessions from the germpiasm collection at the International Institute of Tropical Agriculture were screened in glasshouse tests using a simple visual damage scale.Twenty-four accessions showed considerably reduced damage. an aphid, Aphis craccivora Koch to evaluate the toxic and repellent effects under laboratory condition in the Department of Entomology, Hajee Mohammad Danesh Science and Technology University, Dinajpur during September 2016 to January 2017. Overview; Categorization; ... Filter photos by tag: All; Damage; On artichoke plant (Nogaredo, Boimorto, 2018-06-10) Courtesy: Dorina Pitorac Ministerio de Agricultura Pesca y Alimentación. serious damage and impact yield negatively (Fatokun, 2002).The cowpea aphid, Aphis craccivora , is a major pest of cowpea in Africa (Singh and Jackai, 1985). 1963. 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