Pests and Diseases From Juniper Aphids To Lupin Aphids


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J
Common Name:- Juniper Aphids
P_junipaphids Aphids are insects that suck the sap from any trees it lives on.
In the case of juniper there are at least five Cinara species that attack juniper depending on where in the world the tree is located. These are Cinara cupressi C. fresai C. j...
Caused by:- Various species of Cinara aphids.
Control:- Washing the aphids from the leaves with a strong water jet will wor...

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Common Name:- Juniper blight
P_juniperblight Juniper blight often called "Juniper tip Blight" is causes by the fungus Phomopsis juniperovora which causes juniper branches to turn light brown and gradually die back in late spring and summer. Small pinhead sized black, fruiting bodies containi...
Caused by:- The Fungus Phomopsis juniperovora
Control:- Infected twigs and branches should be pruned about 50mm into live w...

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Common Name:- Juniper Pear Rust
P_pearjnprst3 Juniper Pear Rust is caused by the rust fungus Gymnosporangium sabinae(G. fuscum). Like most rust diseases it requires two different host to complete its life cycle from year to year. With this fungus juniper is the winter host and pear is summer...
Caused by:- The Fungs Gymnosporangium sabinae
Control:- It is important to break the disease cycle and remove infected leav...

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Common Name:- Juniper Scale
P_juniperscale1 Flat rounded or elongate and rectangular white patches with a small yellowish patch on leaves.
See these other Scale insects Azalea Bark,
Caused by:- The Scale insect Carulapsis juniperi
Control:- Spray forceably with perimetrin or other knock down insecticide.

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Common Name:- Juniper Webber Moth
P_junprwebmoth The larvae or caterpillar of the moth Dichomeris marginella after hatching eats the the internal foliage while living in a communal web. It is a very light brown body with dark stripes above and below and is up to 14 mm long. The leaves dries up a...
Caused by:- The Caterpillar of the moth Dichomeris marginella
Control:- Spraying with an insecticide ensuring the insecticide gets into the...

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K
Common Name:- Kabatina Tip Blight
P_kabatinatpblght Kabatina tip blight is caused by the fungus Kabatina juniperi which infects Juniper, Thuja, Abies, Cupressus, Cupressus, and Taxus species. This blight affects the shoots in the season followimng that in which it was infected. Early in the spring...
Caused by:- The Fungus Kabatina juniperi
Control:- Prune out dead and infected twigs and branches to at least 50mm int...

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Common Name:- Keithia Thujina Needle Blight
P_cdrlfblight Didymascella thujina is an ascomycete fungi from the family of Hemiphacidiaceae, which causes Cedar leaf blight (or Keithia Thujina needle blight disease, after the original genus name) in several cedar(Thuja) species. The disease is indigenous to...
Caused by:- The Fungus Didymascella thujina(Keithia thujina)
Control:- Control of the disease can be effective with certain fungicides and...

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Common Name:- Knopper Gall of Acorns
P_acornglwsp The Acorn Gall wasp(Andricus quercuscalicis) causes Knopper Galls of Oak(Quercus) acorns. The wasp lays its egg on a developing acorn in early Summer. When the egg hatches the grub secretes chemicals which causes the acorn to develop into a gall. ...
Caused by:- The Wasp Andricus quercuscalicis
Control:- Unless the infection is great spraying is not necessary as most Oak...

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L
Common Name:- Laburnum Leaf Miners
P_labmnlfmnr The larva of the moth Leucoptera laburnella and the leaf mining fly Agromyza demeijerei mines the leaves of laburnum and their hybrids. The larvae of the moth Leucoptera mines the leaves in the center of the leaves and do so mainly in circles, whe...
Caused by:- The Moth Leucoptera laburnella and fly Agromyza demeijerei
Control:- Spraying with a systemic insecticide during an attack should reduce...

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Common Name:- Lacewings
P_lacewings Lacewing insects are not pests and are one of the gardeners friends like the ladybird and the hoverflies, because the larva and the adults eats aphids and other soft bodied pests with their biting and sucking mouth parts. The adults also feed on p...
Caused by:- Predatory Insects of the Chrysopidae family
Control:- Gardeners can attract lacewings, and therefore their larvae, to gar...

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Common Name:- Lackey Moth
P_lackeymoth The larvae of the Lackey Moth feed gregariously, on the leaves, inside a web tent of silk, in which they regulate their temperature, on many trees such as Apple(Malus) and Pear(Pyrus), hawthorn (Crataegus), blackthorn (Prunus spinosa), oak (Querc...
Caused by:- The Larvae of the Malacosoma neustria Moth
Control:- The best way to control the moths is to remove the tents with the c...

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Common Name:- Ladybirds
P_ladybirds Ladybirds are one of the gardeners best friends as both larva and adult each eat many hundreds of aphids in its lifetime. Worldwide there are about 5000 species, but not all of them are brightly coloured and spotty; some are really quite dull look...
Caused by:- Several Species from the Family Coccinellidae
Control:- Many Gardeners make special ladybird winter quarters to entice lady...

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Common Name:- Laetiporus Fungi
P_laetiporusfgi Laetiporus sulphureus is a species of edible mushrooms found throughout much of the world. It causes a brown heart rot in the wood of large standing and fallen hardwoods and some softwoods such as Apple Beech, conifers, Larch, Oak, Willow, and Ye...
Caused by:- The Fungus Laetiporus sulphureus
Control:- The fungus can be disrupted by removing the fruiting bodies and spr...

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Common Name:- Larch Wooly Adelgid
P_lrchwlyaldgid The Larch Wooly Adelgid, is found anywhere in the world where Spruce and Larch are grown, where it feeds on the needles of larch and on the buds of spruce. In summer on Larch, when the infestation is greatest, the infested foliage appears to be co...
Caused by:- The insect Adelges laricis
Control:- This adelgid can be controlled on small to medium ornamental trees ...

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Common Name:- Large Rose Sawfly
P_lgerseswfly The adult of Arge pagana. Picture by beentree from Wikimedia Commons.
There are two Arge species referred to as the Large Rose Sawfly and several Arge species which look very similar in the larval state. The two Large Rose Sawflies are Arge...
Caused by:- The Sawflies Arge pagana and A. ochropus
Control:- If the infestation is light when spotted, the larvae can be removed...

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Common Name:- Lavender Shab
P_lavshab Lavender Shab is a fungal disease caused by Phomopsis lavandulae that is common in Europe, but not throughout the world. The spores are carried in the air and infect the plants, initially causing shoots to wilt. This fungus kills the stems of the ...
Caused by:- The Fungus Phomopsis lavandulae
Control:- If only a few branches are affected it might be possible to save th...

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Common Name:- Lavetera Leaf Spot
P_lavateralfspt Lavatera leaf spot is usually, but not exclusively, a fungal disease that starts with small red/brown necrotic areas that develop on the stems and leaves, usually starting at ground level and which rapidly enlarged within a few days. It may surrou...
Caused by:- The Fungi Colletotrichum malvarum
Control:- This disease is difficult to control, but if caught early and spray...

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Common Name:- Lawn Fairy Rings
P_lnfryrng Fairy Rings are also known as fairy circle, elf circle, elf ring or pixie ring and also occupy a prominent place in European folklore as the location of gateways into elfin kingdoms, or places where elves gather and dance. It is a naturally occur...
Caused by:- Various Fungi
Control:- Fairy rings are rarely fatal to lawns.<br /> If fairy rings are ...

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Common Name:- Leaf and Bud Eelworms
P_lfandbdelwrm There are several Genus and species of leaf and bud eelworms which are microscopic nematodes and not visible to the naked eye. They causes the foliage to turn yellow in patches between the leaf viens, which then turn brownish-black without the for...
Caused by:- Various Genus and species of Nematodes
Control:- Keep the leaves and stems of your plants reasonably dry as wet foli...

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Common Name:- Leaf Cutter Bees
P_lfcutbees Leafcutter bees are important native pollinators and are not aggressive only stinging when handled. The sting is not as powerful as other bees or wasps. They are a little nuisance though, because they cut circular pieces from the the leaves of Ros...
Caused by:- Megachile rotundata and related species.
Control:- It is usually not necessary to get rid of these bees as the damage ...

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Common Name:- Leaf Miner
P_leafminer1 There are many types of leaf miners that feed between the tissues of leaves. Leaf miners can be beetles(Coleoptera), (flies(Diptera), sawflies(Hymenoptera) and moths(Lepidoptera). The precise pattern of the feeding tunnel between the upper and low...
Caused by:- Several species of Insects
Control:- If there are only a few leaves affected you can pick them off and d...

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Common Name:- Leaf Scorch
P_leafscorch Leaf Scorch of trees is usually a warning that some of the growing condition is adversely affecting the Tree and is most often restricted entirely to the edges of the leaves. It is often called a disease, but is not usually caused by fungus, bacte...
Caused by:- Various non disease conditions
Control:- This condition is not usually too harmful to the tree as by the tim...

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Common Name:- Leaf Spot
P_leafspot Leaf infections called "leafspots" are caused by a variety of fungi and some bacteria on many trees, shrubs and perennials. There are basically two types of leaf spots one caused by fungi and another caused by bacteria. A leaf spot diseases causes...
Caused by:- Various Fungi and Bacteria
Control:- If leaves are severely infected they can be pruned out and fallen l...

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Common Name:- Leaf Weevils
P_lfweevils Leaf weevils come in many different colours and shapes. They are slow moving beetles of a general shape. The larvae of which also eats the roots of the host usually in the winter. In UK, The green Leaf Weevil(Polydrusus impressifrons) is a common ...
Caused by:- Various Weevil Beetles
Control:- Spraying with a knock down insecticide will control these pest, but...

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Common Name:- Leafy Gall
P_leafygall Leafy gall is a bacterial disease of the stems and roots of many herbaceous plants. It is caused by the bacterium Rhodococcus fascians(formerly Corynebacterium fascians), which enters the plant through wounds in roots or stems and stimulates the p...
Caused by:- The Bacteria Rhodococcus fascians
Control:- The disease is not common and seldom severely damaging to warrant c...

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Common Name:- Leapord Moth
P_leapardmoth The Leopard Moth Zeuzera pyrina is a beautiful moth with two sets of three nearly parallel black stripes on its head and black spots on its wing. This moth larvae bores into the wood of a wide range of trees. There is also a Giant leapord moth(Hy...
Caused by:- The Larvae of Zeuzera pyrina
Control:- Spraying in late spring and early summer should kill the adults and...

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Common Name:- Leatherjackets
P_learherjkts One of the grubs of the Tepulidae species. Picture by Canadian Forest Service Archive, Canadian Forest Service, Bugwood.org.
Leatherjackets are the larvae of the Crane fly(Tipula simplex) and Nephrotoma species. The Crane fly has many common...
Caused by:- The Larvae of Tipula and Nephrotoma species
Control:- Encourage insect-eating birds by hanging feeders in the winter mont...

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Common Name:- Leek Moth
P_leekmoth The leek moth, Acrolepiopsis assectella (Lepidoptera: Acrolepiidae) is a local pest in Britain, being mainly found along the east and south coast of England, but as the temperatures are getting hotter it is moving inland. the larvae of this specie...
Caused by:- The larvae of Acrolepiopsis assectella
Control:- Examine the foliage of Alliums, and if you spot damage you can usua...

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Common Name:- Leek Rust
P_leekrust Leek Rust is a common disease of leeks in most seasons. It rarely causes much damage but severe infections may cause leaves to shrivel prematurely and will reduce vigour of the plants. Infections are clearly visible on leaves where bright orange p...
Caused by:- The Fungus Puccinia allii
Control:- Spraying with an approved systemic fungicide at the first sign of l...

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Common Name:- Leek White Tip
P_leekwhitetip Leek White Tip disease is a fungal disease caused by Phytophthora porrii that can become prevalent after heavy rainfalls later in the summer. The first symptoms appear in July and the disease progressed through the harvesting period the following ...
Caused by:- The Fungus Phytophthora porrii
Control:- There are many fungicides that can control this fungus and early de...

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Common Name:- Lettuce Downy Mildew
P_lettdnymldew Downy mildew of lettuce is a serious disease caused by the fungus Bremia lactucae that occurs worldwide. The symptoms are yellow patches and a white mould on leaves. Under favourable conditions, a white cottony-like fungal growth that is indicativ...
Caused by:- The Fungus Bremia lactucae
Control:- Spraying with fungicides is usually ineffective as the disease is s...

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Common Name:- Lettuce Grey Mould
P_letgreymld Lettuce Grey mould is caused by the fungus Botrytis cinerea which is a very common, quick-spreading disease and its airborne spores are always present. B. cinerea is also a cause of damping off in seedlings. It thrives as a saprophyte (a micro-org...
Caused by:- The Fungus The Fungus Botrytis cinerea
Control:- Although there aren't any specific chemicals available to treat gre...

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Common Name:- Lettuce Root Aphids
P_lettrtaphid Te Lettuce Root Aphid(Pemphigus bursarius) on Cichorium intybus. Picture from Wikimedia Commons.
There are several types of Root Aphids specific to certain plants. Lucikily they are usually rare except in certain circumstances.
The L...
Caused by:- The Root Aphid Pemphigus bursarius L.
Control:- Applying insecticide to the soil should help to control the infecti...

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Common Name:- Lettuce Viruses
P_lettvirus There are several viruses that have historically been severe problems of lettuce growers through the world, although their incidence and severity vary widely. Most infections are transmitted by aphids and other sap sucking animals and infected see...
Caused by:- Various Viruses
Control:- There is little one can do about viruses apart from removing the so...

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Common Name:- Lilac Bacterial Blight
P_lilacbacbligth Lilac Bacterial Blight is caused by the bacterium Pseudomonas syringae pv. syringae. The disease is also commonly referred to as Shoot Blight and Blossom Blight. The disease starts as brown spots on stems and leaves of young shoots as they develop...
Caused by:- The Bacteria Pseudomonas syringae
Control:- Try to keep the plant as healthy as possible by applying compost mu...

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Common Name:- Lilac Leafminer
P_lilaclfmnr There are many types of leaf miners that feed between the tissues of leaves. Leafminers are insects can be beetles(Coleoptera), (flies(Diptera), sawflies(Hymenoptera) and moths(Lepidoptera). The precise pattern of the feeding tunnel between the u...
Caused by:- The Larvae of the moth Caloptilia syringella
Control:- The lilac leafminer is best controlled by simply removing the leave...

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Common Name:- Lily Beetle
P_lilybeetle The Scarlet Lily Beetle(Lilioceris lilii) and its larvae can reduce a lily plant to mare stems in a few days. The beetle became established in Surrey in 1939, Although it has been found in the UK many decades before, and it remained confined to so...
Caused by:- The Adult and Larvae of Lilioceris lilii
Control:- The Lily Beetle and their larvae are easily gotten rid of by sprayi...

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Common Name:- Lily Disease
P_lilydisease Lily Disease is caused by the grey mould (Botrytis elliptica). There are two related Botrytis that can be found on lilies at the same time. B.elliptica and B.cinerea, both attack the above ground plant parts. B.elliptica is the more destructive of...
Caused by:- The Grey Mould Botrytis Elliptica
Control:- Spraying with a fungicide will control this mould, but most importa...

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Common Name:- Lily Viruses
P_lilyvirx Viruses are an ultra small intracellular parasite that can only be seen under an electron microscope.They come in many shapes and sizes. [See Viruses]
They will invade a cell injecting its own RNA into the cell, hijack the cells DNA and cau...
Caused by:- Various Viruses
Control:- The best way to reduce viral infections is to have good gardening p...

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Common Name:- Lime Induced Chlorosis
Limeindchl Lime Induced Chlorosis is not a pest as such, but is a symptom that there is something wrong, usually with soil nutrients. This Chlorosis is caused by too much lime(calcium) in the soil especially where acidic soil loving plants are grown. It can ...
Caused by:- Too much Calcium in Growing Media
Control:- Adding well-rotted manure or compost to any soil will help prevent ...

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Common Name:- Lime Nail Gall Mite
P_lmnailglmite From late Spring to Summer red or yellow-green tubelar progections(galls) , up to 5mm are seen on the top surfaces of the leaves of Lime trees(Tilia × europaea (synonym T. × vulgaris)). These are caused by the mite Eriophyes tiliae which feed on...
Caused by:- The Mite Eriophyes tiliae
Control:- Apart from creating the galls this pest does not seem to affect the...

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Common Name:- Lupin Aphids
P_lupinapd Aphids on Lupin. Picture from Wikimedia Commons.
There are several types of aphids that are associated with Lupins. They may have different common names according to which country they are in. Some species, which not only attack Lupins, are...
Caused by:- Various Species of Aphids.
Control:- Spraying with both knock down or systemic insecticide is the quicke...

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