• Geranium aphid

  mottle virus. Life cycle and appearance of Acyrthosiphon malvae rogersii Aphids have a complex life cycle, with both winged and wingless forms of adults and [...] Acyrthosiphon malvae rogersii is holocyclic (i.e. they mate in autumn and produce eggs to overwinter) and monoecious (i.e. they do not change their host plant for [...] General Acyrthosiphon malvae rogersii is a pest of strawberry that is widely distributed in northern and western Europe. Damage symptoms Wingless aphids

• Glasshouse potato aphid

  the form of yellow patches. Heavy yellowing may even be followed by defoliation. Life cycle Glasshouse potato aphid Aphids have a complex life cycle, with [...] (winter eggs are produced) lifecycles. There is no alternation of hosts, and the two types of life cycles occur on the same host plant. The aphid can overwinter [...] aphid ( Aulacorthum solani) is a native European species of aphids , seriously affecting crops of sweet pepper in particular. These aphids further affect

• Fusarium wilt

  Fusarium oxysporum life cycle, is similar to that of most Fusarium species. Fusarium overwinters for many years in the soil and on crop residues of infected plants [...] General Fusarium is a group of soil-borne fungi with many different species. Fusarium is widespread and can infect a range of host crops. Many species are [...] yellow and wilt, mostly on one side of the plant. Finally, the whole plant wilts. Other symptoms are brown discolouration of the xylem vessels which can be

• Blackcurrant aphid

  and appearance of Blackcurrant aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. In g [...] The distal third of the siphunculi is slightly swollen. In spring, the blackcurrant aphid lives on the underside of the young leaves of currant plants. [...] amounts of sticky honeydew on which black sooty mould fungi grow. Leaves and fruit quickly turn black and fruit can become unmarketable. Life cycle and

• Tomato russet mite

  on the lower part of the plant and moves upwards as the mites ascend. Life cycle and appearance of tomato russet mite All life stages of the tomato russet [...] members of the plant family Solanaceae may be affected to a lesser extent. Damage symptoms Damage is caused by the mites sucking out the contents of plant [...] parts: the head with the mouthparts, and the rest of the body. All mobile stages have only two pairs of legs, whereas other mite groups have four pairs.

• Pepino mosaic virus

  strains of PepMV, with varying levels of aggressiveness, but all can cause significant economic losses if not properly managed. Key symptoms of Pepino Mosaic [...] growth patterns Life cycle of Pepino Mosaic Virus (PepMV) PepMV spreads quickly in tomato crops due to its simple, contact-based life cycle. Entry The [...] Mosaic Virus (PepMV) is the use of cross-protection with a mild strain, such as V10 . What is V10? V10 is a mild strain of Pepino Mosaic Virus used in a

• Black root rot of cucurbits

  exudations of spores. In the early stages of wilting it is hard to distinguish from other wilt diseases. The fungus can also cause black fruit rot. Life cycle [...] about the life cycle. The fungus is dispersed by water, air and soil particles. How to prevent Black root rot of cucurbits Test for the presence of Phomopsis [...] lesions are slightly sunken and are mostly formed around the point of attachment of lateral roots and root hairs. The lesions may grow and encircle the

• Blueberry aphid

  severe yield loss. Life cycle and appearance of Blueberry aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great [...] most likely of North American origin and was probably introduced into Europe with plant material. It feeds on blueberries and is a vector of blueberry scorch [...] Blueberry aphids live in dense colonies on young shoots of blueberry bushes and produce large amounts of sticky honeydew. The aphids spread blueberry scorch

• Optimising disease biocontrol in propagation

  April 26, 2021

  the basal end. Infected cuttings generally lead to poor root development, or in severe cases, to a complete loss of rooting potential. Trays of cuttings [...] A hygiene programme is a significant part of the disease control strategy. The use of peroxyacetic acid, e.g. Jet 5, at a 1% v/v dilution, is the nurseryman’s [...] against fungi belonging to the Oomycota ( e.g. Pythium and Phytophthora ), but it has no effect against Ascomycota ( i.e. Trichoderma ). This dual treatment

• Fusarium head blight or scab

  General Fusarium is a group of soil-borne fungi with many different species. Fusarium is widespread and can infect a range of host crops. Many species are [...] as wheat (fusarium head blight wheat) and post-harvest decay. Life cycle and appearance of Fusarium head blight or scab Most Fusarium species only make [...] most Fusarium specieshave a similar life cycle. Fusarium overwinters for many years in the soil and on crop residues of infected plants as chlamydospores