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. No specific permit was required for the described collection. Habitus. is considered to be the most important pest of yardlong bean and cowpea (Sarutayophat et al., 2007). 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. Image 5480852 is of cowpea aphid (Aphis craccivora ) adult(s). 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). 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 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. Cowpea aphid is small and dark, almost black. Aphis craccivora. Damage. nymph on cowpea crop were worked out. 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. aphid, Aphis craccivora Koch, is one of the most serious pests of legumes, such as faba bean, cowpea and pea [3]. 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. The results indicated that all the botanical Aphis craccivora Koch (BASF) Colony on alfalfa Aphis craccivora Koch (BASF) Colony and damage on bean To read this page in French . It is considered as one of the important pests of cowpea in Africa, Asia and Latin America (Jackai and Daoust, 1986). can cause major disruptions to disruptions to parts of the plant’s life cycle. A. craccivora is a common aphid species with agricultural importance in the United States. Walp.) Aphis craccivora causes direct damage to plants by stunting and distorting growth. 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. Cowpea aphid (Aphis craccivora) Pea aphid (Acyrthosiphon pisum) Pest description and crop damage Pea aphid is the most common aphid on vetch. The honeydew produced is deposited on the plants and encourages the growth of sooty moulds which restrict photosynthesis. Aphids ( Aphis craccivora Koch) are an important vegetative stage pest of cowpea in Africa. 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. It is by Brendan Wray. 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. The aphid Due to heavy from damage score indicated that a single dominant gene controlling cowpea resistance in IT82E-16. 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). Both nymphs and adults suck plant sap and cause serious damage right from the seedling to pod bearing stage. particularly in the drier regions of 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 … 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. Taxonomic placing: Insecta, Hemimetabola, Hemiptera, Sternorrhyncha, Aphidoidea, Aphididae.. Common name: Cowpea aphid.. Geographical distribution: Cosmopolitan; CIE Map # 99, 1983 (revised).. It is large, light green, and found on almost all legumes. known to be vectors of diseases of groundnut. 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. Black sooty mold grows over the honeydew, lowering the photosynthetic capacity of the plant. and causes tissue death, decay of the buttons and base of the stem, and stains in the flowers. Female vivipara. APHIS CRACCIVORA KOCH. In this report, we examine how the aphid Aphis craccivora Koch infests Catasetum sp. EILs for - -2012 . Image 5480853 is of cowpea aphid (Aphis craccivora ) adult(s). 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. Aphis craccivora. Thus, owing to the damage that insects Megoura crassicauda is an oligophagous aphid which feeds selectively on Vicia plants such as Feeding by silverleaf whitefly stunts plant growth and development; as a … 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. Aphis craccivora Koch. Both pests feed by sucking plant juice. Aphis craccivora (APHICR) Menu. 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. DAMAGE. Aphis craccivora is one of the most common aphids in the tropics. 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). 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]. It has been 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. craccivora is the most common. HYPPZ on line : Species (scientific name), Pests (common names), Glossary, Crops. On harming activity of groundnut aphid Aphis craccivora Koch. The honeydew produced is deposited on the plants and encourages the growth of sooty moulds which restrict photosynthesis. Whiteflies damage cole crops by sucking enormous quantities of sap and covering plants with sticky honeydew. The damage to yardlong bean by A. craccivora is caused by both adults and nymphs (Ofuya, 1997). damage by various insect pests in the field (Benchasri and Bairaman, 2010). 1963. Although several aphid species may infest faba beans Aphis. It is by Brendan Wray. Aphis craccivora click for html version Summary: Cowpea aphids are shiny black with white and black legs. Female vivipara. 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 They primarily cause damage either by direct feeding or by the transmission of plant viruses (Pickett et al., 1992). The Aphid, A. craccivora is a vector of groundnut rosette virus, peanut mottle virus and peanut stripe virus, cause yield losses up to 40 per cent [8]. 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