gb, west northamptonshire, cirsium arvense, galium aparine, urtica dioica, convolvulus arvensis, ranunculus repens, polygonum aviculare, vicia faba, sonchus asper, veronica persica, plantago major, triticum aestivum, dactylis glomerata, heracleum sphondylium, chenopodium album, senecio vulgaris, hordeum vulgare, stellaria media, rumex crispus, geranium dissectum, potentilla reptans, poa trivialis, lysimachia arvensis, poa annua, persicaria maculosa, capsella bursa-pastoris, lolium perenne, trifolium repens, sinapis arvensis, brassica napus, holcus lanatus, sonchus oleraceus, prunus spinosa, rubus fruticosus, elymus repens, fallopia convolvulus, helminthotheca echioides, plantago lanceolata, crataegus monogyna, alopecurus myosuroides, calystegia sepium, agrostis stolonifera, arrhenatherum elatius, hedera helix, papaver rhoeas, sonchus arvensis, euphorbia helioscopia, lamium purpureum, dioscorea communis, zea mays, rumex obtusifolius