EXPIERENCE AND RESULTS OF APPLE SCAB SIMULATION MODEL RIMpro ADOPTION IN PRACTICE IN LATVIA

Transcription

1 EXPIERENCE AND RESULTS OF APPLE SCAB SIMULATION MODEL ADOPTION IN PRACTICE IN LATVIA R.Rancane, M.Eihe, L.Vilka Latvian Plant Protection Research Centre Riga, Latvia

2 Venturia inaequalis (Cooke) Wint.) is the most important fungal pathogen in fruit-growing in Latvia. The simulation model gives information on the discharge of ascospores and can be helpful in determining the time of the severe infection during the primary scab infection period.

3 Adaptation of apple scab simulation model in integrated plant protection in Latvia was carried out in Latvian Plant Protection Research Centre during (23 25 in 1, 26 3 and 27 8 farms). In 27 the aim of investigation was to determine efficacy of use in practice in Latvia.

4 MATERIALS AND METHODS Weather stations located in different regions of Latvia installed on PC of LPPRC

5 Type of weather stations: Metos Compact (company Pessl) 1, Lufft 9 above 5 RIM value were accepted as the risk Information for growers were sent via mobile phone Orchards were inspected 3 times per season to determine efficacy of showed by Type of assessments: damaged surface by 9 scores scale, calculated in %, on 1 and per plot

6 LOCATION OF THE WEATHER STATIONS SIA Malum Ugu i, J.Iganatovi s z/s Svitkas Kauguru pag., M.Eliass z/s Ievulejas Vi aka, V.Romanovs P res DIS z/s Mucenieki LVAI Jaunlutri u pag., L.Rezgale z/s Kalnanoras Ikš ile, G.Rullis z/s bel tes ZS Ceraukstes pag., D.Anuža k/s Poceri Lone, M.L pl sis z/s Bandari ornajas pag., J.Batars Company Lufft 9 stations Company Pessl 1 station

7 RESULTS In all apple orchards the first protective application with copper containing fungicide Champion was carried out during green tip stage of apples before ascospores discharge ( ). Further applications were carried out according to and our recommendations.

8 PURE RESEARCH STATION Tukums region west / central part of Latvia Cultivar Antonovka Primary scab infection period Dates RIM values per day (>15 RIM) Date Fungicides use Residues from previus use, % 6. Fungicide Champion 5 Chorus 75 Effector

9 Apple scab incidence in Pure Research Station Number of fungicides applications (during primary + secondary infection period) Amount of infected objects, % Assessment 3 rd 1 day period of June September

10 MUCENIEKI Saldu region south / west part of Latvia Cultivar Saltanat Primary scab infection period Fungicides use Dates RIM values per day (>15 RIM) Date Residues from previus use, % Fungicide Mancozeb Effector Chorus Score Score 25

11 Apple scab incidence in farm Mucenieki Number of fungicides applications (during primary + secondary infection period) Amount of infected objects, % Assessment 3 rd 1 day period of June September

12 ABELITES Bauska region south / central part of Latvia Cultivar Ligol Primary scab infection period Dates RIM values per day (>15 RIM) Date Residues from previus use, % Fungicides use Fungicide Champion 5 Mancozeb + Chorus 75 Candit Mancozeb + Chorus 75 Mancozeb + Score 25

13 Apple scab incidence in farm Abelites Number of fungicides applications (during primary + secondary infection period) Amount of infected objects, % Assessment 3 rd 1 day period of June September

14 KALNANORAS Ogre region central part of Latvia Cultivar Spartan Primary scab infection period Dates RIM values per day (>15 RIM) Date Fungicides use Residues from previus use, % Fungicide Champion 5 Mancozeb Chorus 75 Chorus 75 Chorus 75

15 Apple scab incidence in farm Kalnanoras Number of fungicides applications (during primary + secondary infection period) Amount of infected objects, % Assessment 3 rd 1 day period of June September

16 SVITKAS Valmiera region north part of Latvia Cultivar Auksis Primary scab infection period Dates RIM values per day (>15 RIM) Date Residues from previus use, % Fungicides use Fungicide Champion 5 Candit Score 25 Mancozeb + Chorus 75 Score 25

17 Apple scab incidence in farm Svitkas Number of fungicides applications (during primary + secondary infection period) Amount of infected objects, % Assessment 3 rd 1 day period of June September

18 BANDARI Rezekne region east part of Latvia Cultivar Belorusskoye Malinovoye Primary scab infection period Dates RIM values per day (>15 RIM) Date Residues from previus use, % Fungicides use Fungicide Champion 5 Chorus 75 Effector + Chorus 75

19 Apple scab incidence in farm Bandari Number of fungicides applications (during primary + secondary infection period) Amount of infected objects, % Assessment 3 rd 1 day period of June September 3 +

20 IEVULEJAS Balvi region north / east part of Latvia Cultivar Lobo Primary scab infection period Dates RIM values per day (>15 RIM) Date 2.4. (!) Fungicides use Residues from previus use, % Fungicide Champion 5 (!) Chorus 75

21 Apple scab incidence in farm Ievulejas Number of fungicides applications (during primary + secondary infection period) Amount of infected objects, % Assessment 3 rd 1 day period of June September

22 POCERI Jekabpils region south / east part of Latvia Cultivar Geneva Early Primary scab infection period Dates RIM values per day (>15 RIM) Date (!) (!) (!) Residues from previus use, % Fungicides use Fungicide Champion 5 (!) Mancozeb + Chorus 75 Mancozeb + Candit (!) Candit (!)

23 Apple scab incidence in farm Poceri Number of fungicides applications (during primary + secondary infection period) Amount of infected objects, % Assessment 3 rd 1 day period of June September

24 CONCLUSIONS The common apple scab primary infection period lasted from the May 8th until the June 19th in Latvia, 27. In different regions there were 3 6 separate scab infection periods above 5 RIM values (1 4 above 1 RIM). 3 5 fugicides applications (including the first protective) were necessary for sufficient scab control if carried out in determined terms.

25 Even one undone application resulted with significant scab expansion (farm Ievulejas ). In 27 mainly curative fungicides Chorus 75 or Score 25 separately or in mixture with protective product after infection was recommended. In generally were acceptable for control apple scab in Latvia if the fungicides applications were carried out accordingly to recommendations.

26 PROBLEMS... technical problems access to internet professional advisors computer specialists amount of weather stations no precisely weather prognosis How to make user friendly??? It is easer to create new DSS than to achieve that farmers use and trust in it.

27 THANKS FOR YOUR ATTENTION!!!