View Pest and Disease Information

Current Pest and Disease Information

Edit Species Name Date Added Category Symptoms Biology Control Methods Growth Stage Disease Name Synonym Host Name Host Common Name Affected Part
Edit Aspergillus wentii Wehmer 2020-06-11 12:27:38 Aspergillus wentii Wehmer
Edit Alternaria tenuissima (Nees) Wiltshire 2020-06-11 12:24:34 Causes leaf spots and browning of leaves Overwinters as mycelium/spores in infected plant debris. Spores may be disseminated during rains to susceptible plant when they germinate directly through wound. Forms conidia that are further spread to cause infection Apply systemic fungicide to affected trees. Use resistant trees when planting Mature tree Alternaria leaf spot Alternaria tenuissima (Nees) Wiltshire Pinus radiata Radiate pine Pine needles
Edit Botryosphaeria ribis (Fuckel) Petr. 2020-06-09 13:00:14 Causes cankers, leaf spots and necrosis and twig dieback on many woody hosts in tropical regions It forms airborne spores from black pycnidia. The conidia germinates on wounded susceptible trees to cause infection which leads to loss of yield and can kill the host Use of resistant less susceptible varieties. balanced nitrogen and potassium in soils and lower plant density in the field. Mature tree Botryosphaeria canker Botryosphaeria ribis (Fuckel) Petr. Pinus patula
Edit Cercospora pini-densiflorae Hori & Nambu 2020-06-09 12:51:39 Needle blight characterized by yellowing then browning of pine needles leading to premature leaf loss and tree Browning of needles causing defoliation and stunted growth of saplings. The infection spreads to new regions or unaffected stock. Hyphae overwwinter in affected needles as latent pathogens and cause symptoms in warm wet conditions Use of resistant or less susceptble species of Pine and other conifers Late Nursery stage Needle blight of Pine Pseudocercospora pini-densiflorae (Hori & Nambu) Deighton Pinus thunbergii Japanese Black Pine Leaves
Edit Aspergillus niger Tiegh. 2020-02-21 12:53:14 Causes seed rots Black mold affecting trees in damp and moist conditions Removal of affected material and spraying with fungicide Mature tree Black mold Aspergillus niger Tiegh. Pinus caribaea Carribean pine Leaves, stem and fruits
Edit Cercospora ranjita S. Chowdhury 2020-02-21 06:59:05 Leaf and fruit spots. May also cause blights Small leaf spots which enlarge and merge together to form blight that shrivels and dries up the leaves Spray with systemic fungicides Mature tree Pseudocercospora blight Pseudocercospora ranjita (S. Chowdhury) Deighton Gmelina arborea White teak Leaves
Edit Botryodiplodia theobromae (Pat.) 2020-02-21 06:30:46 Spores (conidia) are released during rain and are dispersed by wind, insects, pruning tools, and rain droplets. Wounded bark can be infected throughout the growing season during moist conditions but most abundantly in spring. Cankers develop at wound site Preventing wounds is the best way to minimize cankers. Cankered branches should be pruned in the winter to reduce inoculum (fungus available to initiate new infections). Severely diseased trees and branches should be removed. Pruning cuts should be made w Mature tree Botryodiplodia canker Lasiodiplodia theobromae (Pat.) Griffon & Maubl. Podocarpus sp. Podo Stem, branches
Edit Cercospora ranjita S. Chowdhury 2020-02-21 06:30:38 Pseudocercospora ranjita (S. Chowdhury)
Edit Botryodiplodia theobromae (Pat.) 2020-02-21 06:28:57 Spores (conidia) are released during rain and are dispersed by wind, insects, pruning tools, and rain droplets. Wounded bark can be infected throughout the growing season during moist conditions but most abundantly in spring. Cankers develop at wound site Preventing wounds is the best way to minimize cankers. Cankered branches should be pruned in the winter to reduce inoculum (fungus available to initiate new infections). Severely diseased trees and branches should be removed. Pruning cuts should be made w Mature tree Botryodiplodia canker Lasiodiplodia theobromae (Pat.) Griffon & Maubl. Podocarpus sp. Podo Stem, branches
Edit Botrytis cinerea Pers. 2020-02-21 06:24:29 Grayish coloured spots on leaves stems and flowers. Causes rot of affected part It is widespread on plant material, initially affects blossoms, bruises, dead flower petals touching the ground when spores germinate. The fungus rapidly penetrates the plant tissue causing rot Proper plant spacing for circulation of air. Rot debris to be removed periodically. Apply systemic fungicide Mature tree Botrytis Gray mold Botrytis cinerea Pers. Widdringtonia whyteii Mulanje cypress Leaves, stems and flowers
Edit Botrytis cinerea Pers. 2020-02-21 06:14:45 Grayish coloured spots on leaves stems and flowers. Causes rot of affected part It is widespread on plant material, initially affects blossoms, bruises, dead flower petals touching the ground when spores germinate. The fungus rapidly penetrates the plant tissue causing rot Proper plant spacing for circulation of air. Rot debris to be removed periodically. Apply systemic fungicide Mature tree Botrytis Gray mold Botrytis cinerea Pers. Widdringtonia whyteii Mulanje cypress Leaves, stems and flowers
Edit Botryosphaeria sp. Ces & De Not. 2020-02-21 06:08:17 Death of new shoots on pine It forms airborne spores from black pycnidia. The conidia germinates on wounded susceptible tree to cause infection Use of resistant less susceptible varieties. balanced nitrogen and potassium in soils and lower plant density in the field. Mature tree Diplodia tip blight Botryosphaeria sp. Ces & De Not. Pinus radiata Radiate pine Leaves
Edit Cercospora sp. Fresen. 2020-02-21 06:03:22 presence of tiny black dots on leaf surface usually surrounded by gray sunken holes If forms conidia on long dark coniodophores through stomata. Conidia are detached and blown by the wind. When they land on susceptible plants the germinate to cause spots Use disease free seeds. Rotate crops with resistant hosts. Spray the plants with fungicides such as bourdeaux mixture Mature tree Cercospora leaf spot Cercospora sp. Fresen. Chlorophora excelsa Leaves
Edit Ceratostoma juniperina Ellis & Everh. 2020-02-21 05:57:01 Stem swollen with galls Penetrates the bark though wounding. Causes abnormal cell division resulting to stem galls. pimple like pycnidia & perithecia develop and discharge conidia and ascospores that cause further infection. Trunk or root injection with systemic fungicide Mature tree Ceratostoma stem gall Ceratostoma juniperinum Ellis & Everh. Juniperus procera African pencil cedar Stem
Edit Alternaria tenuis Nees 2020-02-21 05:47:43 Yellow, dark brown to black circular leaf spots in concentric rings found on leaves. Overwinters as mycelium/spores in infected plant debris. Spores may be disseminated during rains to susceptible plant when they germinate directly through wound. Forms conidia that are further spread to cause infection Apply systemic fungicide to affected trees. Use resistant trees when planting Mature tree Alternaria leaf spot Alternaria alternata (Fr.) Keissl. Alnus nepalensis Nepalese Alder Leaves
Edit Armillaria mellea (Vahl) P. Kumm. 2020-02-21 05:41:11 Rotting roots. White mat of interconnected string like structures on the base of the tree below the back. Drying up of entire tree once affected The fungi overwinters as mycelium or rhizomorphs on decaying roots. Rhizomorphs grow to infect healthy roots by root contact Removing the affected tree and burning. Avoidance of affected area for several years, soil fumigation and digging a trench around the infected tree and its healthy nearby trees Mature tree Armillaria root rot Armillaria mellea Pinus radiata Radiate pine
Edit theobromae 2019-12-11 06:08:20 Eucalyptus Darkening around lesions and forming sunken holes on stem. Gum exudation also seen causing dieback on twigs and gradual death It is a wound parasite known to cause rots in fruits and stem cuttings A biological control for this fungus is being developed. Planting resistant species. Treatment with systemic fungicides when planting Standing Botryodiplodia theobromae (Pat.) Lasiodiplodia theobromae (Pat.) Griffon & Maubl. Eucalyptus tirculli Eucalyptus grandiis Stem, Branches