There are many fungi that cause blight diseases. Seed potatoes are also grown for markets in the South Pacific and Thailand. Approved Tissue Culture & Mini-Tuber Facilities, NZ Seed Potato Certification Guides & Rules, MRL Residue Compliance Booklet Dec 2020 ONLINE PDF VERSION, MRL Residue Compliance Booklet Dec 2020 (single printable pages), Guidance for the MPI Phytosanitary Official Assurance Programme for Potato Cyst Nematode and Potato Wart, Potato Chat November 2020: The Great Kiwi Potato Fritter, Potatoes NZ Newsletter #102 – November 2020, 2020: The year that proved our industry’s resilience and agility. Phytophthora nicotianae var. “The application is based on the real threat of material injury to the New Zealand potato industry. In New Zealand, a team of Lincoln University researchers is impressed with the results from a trial of a mesh cover that is used to protect potato crops from insect pests. Recent News. Pythium aphanidermatum Potatoes NZ Newsletter #101 – October 2020. PRESS RELEASE 4th November 2020: MBIE to investigate fries threat. 5th November 2020 Potatoes NZ Newsletter #101 – October 2020 27th October 2020; Potato Chat October 2020: Onslow’s favourite spud dishes 22nd October 2020 = Corynebacterium sepedonicum, Streptomyces scabiei Can be viewed via the World Potato Congress Inc. website at www.potatocongress.org. The project is developing new knowledge that may provide a basis for manipulating soil factors to reduce the harmful effects of the powdery […] Early Blight (Alternaria solani) is a commonly occurring disease of potatoes during summer in New Zealand. Potato scab symptoms include dark brown, pithy patches that may be raised and “warty.”. Kauri dieback is killing the iconic Kauri trees of New Zealand. Phoma foveata = Cercospora concors eumartii, Phoma solanicola f. foveata Phytophthora megasperma Verticillium dahliae, Globodera rostochiensis Those uninfected can be used. The cooperation of commercial producers and home gardeners to control diseases of great concern, such as late blight, is essential. Meloidogyne hapla Fusarium equiseti = Fusarium solani This disease mainly affected due to high storage temperature and low oxygen levels. Gibberella pulicaris Potatoes NZ Newsletter #102 - November 2020 - Potatoes New Zealand. Alternaria, also known as early blight, is a mainly soil-borne fungal pathogen that affects … Both Potatoes New Zealand and Biosecurity New Zealand have said the disease cannot be eradicated, … Fusarium acuminatum A second possible cause is potato late blight (Phytophthora infestans), a fungal disease. All dis- Potato diseases are caused by fungi, bacteria, viruses, mycoplasmas, a viroid, nematode m- festations, and by abiotic, or noninfectious, entities. Biosecurity New Zealand said today it was working with Potatoes New Zealand to respond to a detection of Potato mop-top virus (PMTV) in potato tubers. Pectobacterium carotovorum subsp. Pratylenchus coffeae, Meloidogyne spp. Meloidogyne incognita These potatoes are low in water content and high in starch. 5th November 2020 Potatoes NZ Newsletter #101 – October 2020 27th October 2020 These lesions can affect just a small portion of the tuber surface, or may completely cover it. This is a list of diseases and disorders found in potatoes. The bacterium, Candidatus Liberibacter solanacearum, has been found in tomatoes, capsicums, potatoes, tamarillos and chilli. Streptomyces acidiscabies It's not active, though, when the soil pH is below 5.4, so if you have a serious scab problem, take a soil pH test. Fusarium oxysporum = Phoma exigua f. sp. The psyllid arrived in New Zealand just over a decade ago … No need to register, buy now! = Sclerotium bataticola, Fusarium spp. Anywhere in the field because it is a seed borne disease. Depending on the extent of the damage, these potatoes may still be edible once the scab is removed, but they’re definitely not fit for the farmer’s market. Globodera pallida, Pratylenchus spp. The disease stunts potato and tomato plants, reducing crop yields. Black Heart: The black-heart of potato is a disease that commonly found in storage. Calcium strengthens tuber skins providing better resistance to many diseases including black scurf silver... Boron. If this disease established in New Zealand, it could also affect our exports. Photo: 123RF. The virus is not a health hazard but it lowers growth in potato plants and so reduces the yield from a crop. Potatoes NZ Newsletter #102 – November 2020 2nd December 2020; 2020: The year that proved our industry’s resilience and agility 26th November 2020; PRESS RELEASE 4th November 2020: MBIE to investigate fries threat. One of the greatest challenges especially for growers, is the control of Potato Tuber Moth (PTM). Phytophthora erythroseptica A common tuber disease that occurs wherever potatoes are grown. Since its arrival in New Zealand, the psyllid was thought to transmit and spread a phytoplasma disease in potato crops, but this is now thought to be transmitted only by leaf hoppers. subterranea, Rhizoctonia solani Global distribution of Potato spindle tuber viroid. atrosepticum The objective of this bulletin is to aid in the diagnosis of those tuber diseases and defects that most often result in production problems. 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