Peruvian nightshade in combination with a pesticide showed good results, but other alternatives are being tried to preserve the ecology.
In August 2015, the first case of “pale” potato nematodes was discovered in the northeastern part of Hokkaido, Abashiri Pale Globodera (G. pallida).
This region in Japan claims that the largest volume of potatoes is grown here, including for export. In addition to the “pale” potato nematode, a golden potato nematode was revealed here. Globodera rostochiensis (G. rostochiensis).
Since September 2015, soil inspection and tuber sampling services have been launched and implemented in the region.
As a result of these checks, G. pallida was confirmed on 163 fields on 681 ha (more than 10% of the tested fields). Moreover, it was confirmed that about 10 years have passed since the first nematodes G. pallida first infected the fields.
In September 2016, a second inspection was conducted on the basis of the law on plant protection in order to ensure the complete destruction of this pest. Any planting of potatoes in the affected area and the transportation of tubers were prohibited.
Since no potato variety is resistant to G. Pallida was not brought to Japan, the use of 1,3-dichloropropene and seed crops of ground cover crops (wild tomato species, nightshade Peruvian Ethylene-sweet L.) was chosen as a solution for the destruction of a pest.
In 2018, 1,3-dichloropropene was applied on 68 fields on 284 ha, and cover crops were planted on 79 fields on 265 ha. In 28 fields (131 ha), the potato nematode control strategy consisted of “double application of 1,3-dichloropropene and planting one sowing crop” or “one application of 1,3-dichloropropene and two plantings of sowing crops in a row”.
1,3-dichloropropene is not approved in Europe and other countries.
Although 1,3-dichloropropene is approved in Japan, its use has its problems, including a safe disposal method.
Abashiri - a place for salmon. Some of the potato fields where G. pallida was discovered are located near the important river where fish live. Taking this fact into account, new strategies for controlling the nematode are currently being considered. For example, granular nematicides are applied to contaminated fields located 500 meters from the river, instead of the strategy of using 1,3-dichloropropene in combination with ground cover crops. In addition, appropriate crop rotation and planting of sustainable potato varieties are introduced.
(Source: potatonewstoday.com. Author: Mariko Kihira).
Read more: https://www.agroxxi.ru/gazeta-zaschita-rastenii/novosti/kak-v-japonii-boryutsja-s-globedorozom-kartofelja.html