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Plantwise Technical Factsheet

green peach aphid (Myzus persicae)

Host plants / species affected
Abelmoschus esculentus (okra)
Aleurites
Aloe (grey alder)
Anchusa (Bugloss)
Anethum graveolens (dill)
Anthriscus (chervil)
Antirrhinum (snapdragon)
Apium graveolens (celery)
Araceae
Arachis hypogaea (groundnut)
Armoracia rusticana (horseradish)
Artemisia (wormwoods)
Asparagus officinalis (asparagus)
Beta vulgaris var. saccharifera (sugarbeet)
Brassica
Brassica oleracea (cabbages, cauliflowers)
Brassica oleracea var. viridis (collards)
Brassica rapa cultivar group Caixin
Brassica rapa subsp. chinensis (Chinese cabbage)
Cajanus cajan (pigeon pea)
Capsella bursa-pastoris (shepherd's purse)
Capsicum (peppers)
Capsicum annuum (bell pepper)
Carica papaya (pawpaw)
Carthamus tinctorius (safflower)
Catharanthus roseus (Madagascar periwinkle)
Chenopodium (Goosefoot)
Chenopodium quinoa (quinoa)
Chrysanthemum (daisy)
Chrysanthemum indicum (chrysanthemum)
Cichorium intybus (chicory)
Citrullus lanatus (watermelon)
Citrus
Colocasia esculenta (taro)
Convallaria majalis (lily of the valley)
Convolvulus (morning glory)
Coriandrum sativum (coriander)
Crocus sativus (saffron)
Cucumis (melons, cucuimbers, gerkins)
Cucurbita (pumpkin)
Cucurbita moschata (pumpkin)
Cucurbita pepo (marrow)
Cuminum cyminum (cumin)
Cydonia oblonga (quince)
Cynara cardunculus var. scolymus (globe artichoke)
Cyphomandra betacea (tree tomato)
Dahlia
Daucus carota (carrot)
Dianthus (carnation)
Dianthus caryophyllus (carnation)
Euphorbia (spurges)
Foeniculum vulgare (fennel)
Fragaria chiloensis (Chilean strawberry)
Gladiolus hybrids (sword lily)
Glycine max (soyabean)
Gossypium (cotton)
Hemerocallis (daylilies)
Hordeum vulgare (barley)
Humulus lupulus (hop)
Impatiens (balsam)
Indigofera (indigo)
Ipomoea batatas (sweet potato)
Iris (irises)
Lactuca sativa (lettuce)
Lavandula angustifolia (lavender)
Lepidium sativum (garden cress)
Lepidium virginicum (Virginian peppercress)
Lilium (lily)
Lolium (ryegrasses)
Lolium multiflorum (Italian ryegrass)
Lupinus (lupins)
Malus domestica (apple)
Malva (mallow)
Matthiola
Medicago sativa (lucerne)
Mentha (mints)
Narcissus (daffodil)
Nasturtium officinale (watercress)
Nicotiana tabacum (tobacco)
Origanum majorana (sweet marjoram)
Papaver somniferum (Opium poppy)
Passiflora edulis (passionfruit)
Pastinaca sativa (parsnip)
Persea americana (avocado)
Petroselinum (parsley)
Phaseolus (beans)
Pisum sativum (pea)
Poa (meadow grass)
Prunus (stone fruit)
Prunus amygdalus
Prunus armeniaca (apricot)
Prunus mume (Japanese apricot tree)
Prunus nana
Prunus nigra (Canada plumtree)
Prunus persica (peach)
Prunus serotina (black cherry)
Psidium guajava (guava)
Punica granatum (pomegranate)
Raphanus sativus (radish)
Rhus (Sumach)
Rosa (roses)
Rumex acetosa var. hortensis (garden sorrel)
Saccharum officinarum (sugarcane)
Secale cereale (rye)
Senecio (Groundsel)
Senecio vulgaris
Sesamum indicum (sesame)
Solanum lycopersicum (tomato)
Solanum melongena (aubergine)
Solanum nigrum (black nightshade)
Solanum tuberosum (potato)
Spinacia oleracea (spinach)
Trifolium (clovers)
Trigonella foenum-graecum (fenugreek)
Triticum (wheat)
Tulipa (tulip)
Vicia (vetch)
Vigna unguiculata (cowpea)
Zea mays (maize)
List of symptoms/signs
Growing point  -  external feeding
Inflorescence  -  external feeding
Leaves  -  abnormal colours
Leaves  -  abnormal patterns
Leaves  -  honeydew or sooty mould
Leaves  -  honeydew or sooty mould
Leaves  -  honeydew or sooty mould
Leaves  -  leaves rolled or folded
Leaves  -  necrotic areas
Leaves  -  necrotic areas
Stems  -  external feeding
Whole plant  -  dwarfing
Whole plant  -  wilt
Symptoms

Effect of infestation depends greatly on host plant and transmitted viruses. Spring populations on peach cause severe leaf curl and shoot distortion. In potato, PLRV symptoms are leaf rolling and tuber stem necrosis. In sugarbeet, beet yellows viruses (BYV, BYDV, BWYV) cause yellowing in older leaves, chlorotic spotting, and thickening of the leaves, which become leathery and brittle.

On many crop plants (for example, potato, brassicas, sugarbeet) M. persicae only occurs at low densities, particularly on older leaves. Large colonies of the tobacco form (nicotianae) occur on growing stems and younger leaves.

Prevention and control

Chemical Control

Due to the variable regulations around (de-)registration of pesticides, we are for the moment not including any specific chemical control recommendations. For further information, we recommend you visit the following resources:
- PAN pesticide database (www.pesticideinfo.org)
- Your national pesticide guide

Impact

M. persicae is the most important aphid virus vector. It has been shown to transmit well over 100 plant virus diseases, in about 30 different families, including many major crops. Persistent viruses transmitted include Beet western yellows virus, Beet yellows virus, Beet mild yellowing virus, Pea enation mosaic virus, Bean leaf roll virus, Potato leaf roll virus and several viruses of tobacco (for example, Tobacco vein-distorting virus, Tobacco yellow net virus). Many more are transmitted by the non-persistent method, including Potato virus Y, Cucumber mosaic virus, Clover yellow vein virus, Alfalfa mosaic virus, Pepper veinal mottle virus, Plum pox virus, Lettuce mosaic virus and Tobacco vein mottling virus.

Direct feeding damage can result in stunting and reduced root weight, but populations on most crops do not reach levels causing obvious symptoms such as chlorosis or leaf curling, and the production of copious honeydew with associated sooty mould. However, significant yield losses can arise from direct damage on potatoes (Sexson et al., 2005) and visible distortion of leaves can occur on peach in the spring as well as on peppers and flower crops in greenhouses.

M. persicae is a major pest everywhere potatoes are grown. It is the most important vector of Potato leafroll virus (PLRV), which causes leaf roll and tuber rot necrosis. Seed potatoes have low tolerance for PLRV and low aphid populations can be very damaging.

Yield losses in sugarbeet due to beet yellows are more serious if infection occurs early in the season and can be up to 30-50%, with an increase also in the impurities present in the harvested sugar.

On peach (the primary host) the aphid causes twisting of the young leaves and on nectarines, pitting on and discoloration of the young fruits (Barbagallo et al., 2007).

Related treatment support
Plantwise Factsheets for Farmers
Hossain, M. A.; Islam, Z.; Rafiquzzaman, M.; CABI, 2013, English language
Hossain, M. A.; Islam, Z.; Rafiquzzaman, M.; CABI, 2013, Bengali language
Rutikanga, A.; Uwamahoro, F.; Rukundo, A.; CABI, 2012, English language
Rutikanga, A.; Uwamahoro, F.; Rukundo, A.; CABI, 2012, Kinyarwanda language
Isaac, S.; CABI, 2015, English language
 
Pest Management Decision Guides
Kimomwe, K. H.; CABI, 2014, English language
Aziza; CABI, 2015, Bengali language
Murage, N.; Otipa, M.; Kilalo, D.; Ombuya, A.; Ochilo, W.; Badii, B. K.; Serwah-Nuamah, H.; Braimah, H.; Cudjoe, A.; Awuku, M.; CABI, 2016, English language
Aziza; CABI, 2015, English language
Raza, A.; Farooq, T.; CABI, 2017, English language
 
External factsheets
Pennsylvania State University Insect Pest Fact Sheets, The Pennsylvania State University, English language
Guía Práctica de Plagas y Enfermedades de Arboles Agrícolas en Bolivia, CABI, 2001, Spanish language
TNAU Agritech Portal Crop Protection Factsheets, Tamil Nadu Agricultural University, English language
TNAU Agritech Portal Crop Protection Factsheets, Tamil Nadu Agricultural University, Tamil language
TNAU Agritech Portal Crop Protection Factsheets, Tamil Nadu Agricultural University, English language
Video factsheets
Agropedia ICRISAT PPT-Videos, IIT, Kanpur, 2014, English language
Koppert Pest Control videos, Koppert Biological Systems, 2016, English language
Koppert Pest Control videos, Koppert Biological Systems, 2016, English language
Agropedia ICRISAT PPT-Videos, IIT, Kanpur, 2014, English language
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