When an insect incursin cmes with a package: Management f tmat ptat psyllid and the pathgen it vectrs, in ptat Jessica Vereijssen
Presentatin n TPP Management
Acknwledgments Jhn Andersn Anna-Marie Barnes Melanie Davidsn Rbin Gardner-Gee Jeanne Jacbs Frances MacDnald Flre Mas Mette Nielsen Kye-Chung Park Andrew Pitman Aleise Puketapu Manharie Sandanayaka Ian Sctt Grant Smith Max Suckling Natasha Taylr Sarah Thmpsn Shirley Thmpsn Gail Timmerman-Vaughan Graham Walker Peter Wright Sustainable Farming Fund 11/058 & 09/143 MBIE PBCRC 2002 PBCRC 2079 CAP10-72 CAP10-37 Cre Ptates 13-14
Presentatin verview Intrductin Difficulties & current research fr Bacterium Hst plant Psyllid Take hme message n management
Tmat Ptat Psyllid (TPP) management Befre TPP incursin a draft IPM system fr ptat After TPP incursin, IPM system develpment stpped Management mainly thrugh calendar spraying f insecticides Fear fr insecticide resistance, nt nly in TPP Emphasis n using naturally ccurring beneficial insects, especially early in the seasn Emphasis n increasing spray intervals, incrpratin f agricultural ils, threshlds and Degree Days
insect bacterium hst plant + =
The bacterium Candidatus Liberibacter slanacearum (CLs) Causes Zebra Chip disease in ptates Lives in the phlem f the plant Lives inside the psyllid t Difficulties A new t science species Cannt grw the CLs in the lab Detectin using Plymerase Chain Reactin (PCR & qpcr) Where is CLs in an annual r perennial plant?
The bacterium current research Genetic differences CLs (USA and NZ) What des CLs d in the plant? Plant respnse Plant defence Breeding
The hst plant Cultivated plants frm Slanaceae family ptates, capsicum, tmates, tamarill, gji berries Difficulties Many weeds E.g. nightshades, bxthrn, prpr Plants respnd differently t TPP and bacterium
The hst plant current research Rle f nn-crp hst plants in the life f the psyllid D nn-crp hst plants get infected with Cls? Hw d these plants respnd t CLs? Why are there differences? Effect f tuber-brne CLs in ptat www.bushmansfriend.c.nz www.bushmansfriend.c.nz
The psyllid Tmat ptat psyllid Present in Mexic, USA, Canada (glasshuses nly), Guatemala, Hnduras, Nrflk Island & New Zealand Causes psyllid yellws Difficulties Hw many carry the bacterium? D they survive frsty winters and where d they g? Hw d we best mnitr psyllids? When d yu start spray prgrammes? D fewer psyllids = less Zebra Chip?
The psyllid current research Reduced spray prgrammes Degree Days Actin threshld Agricultural ils Increasing spray interval Lincln Pukekhe 40 40 30 30 Trap cunt 20 Trap cunt 20 10 10 0 0 1 Nv 13 1 Dec 13 1 Jan 14 1 Feb 14 1 Mar 14 Date 1 Nv 13 1 Dec 13 1 Jan 14 1 Feb 14 1 Mar 14 Date
The psyllid current research Effect f psyllid feeding n ptat plant Ppulatin dynamics Insecticide resistance genes Optimising trap height Seed tuber management Semichemicals and ther cues
One very imprtant thing t remember When managing an insect pathgen hst plant cmplex: N single apprach will achieve adequate cntrl; an integrated apprach t management is needed. www.bushmansfriend.c.nz www.bushmansfriend.c.nz
Take hme messages Start with clean seed Plant mnitring r sticky traps frm emergence Use reduced spray prgrammes where pssible Degree Days Agricultural ils Threshld Increased spray intervals Lk fr presence beneficial insects Knw what yur insecticides d TPP and beneficial insects Rtate active ingredients insecticide resistance Pukekhe: early ptates withut insecticide www.bushmansfriend.c.nz www.bushmansfriend.c.nz
www.plantandfd.c.nz Jessica.Dhmen-Vereijssen@plantandfd.c.nz