At the start of the class , Porta Nova turned its aid to Limonica as the most authoritative beneficial for thrips in a planting of roses that were less than one year old . A venturesome yet efficient approach – thanks in part to a temporary overkill , the pest has keep its head down in the White Naomi cultivar , which is susceptible to thrips .
At Porta Nova , Peter Lansbergen is the man responsible for for plant protection . Peter started act at Porta Nova a year ago , and one of the first questions that he expect us was if improvement could be made to plant protection . The caller has four growing locations on Abraham Kroesweg in Waddinxveen , covering more than nineteen hectare . The companionship grows Red Naomi and White Naomi cultivar .
" Plant protection in White Naomi is hard than in Red Naomi . The White Naomi harvest is full , which imply that pests find it easier to hide out , plus the variety is also more susceptible to things like thrips . At Porta Nova , polish is heavily focused on high quality . We make no concession on mood , light , or the growing government , even if doing so would do good biological plant protection , " explicate Peter .
Peter Lansbergen : ‘ We have constitute the right balance . It ’s very reassuring . ’
inviolable overkillStill , White Naomi had to be develop with far fewer pesticide . work with Vince van der Gaag and Ellen Klein at Koppert , Porta Nova decided to get concentrate the use of pesticides at the origin of 2020 and to start using Limonica – the Amblydromalus limonica predatory microbe . Pesticide spraying was stopped and in week seven , once the crop was free of chemical balance , Limonica was introduce .
And it was n’t done modestly either . The beneficial was blown over the harvest in an ‘ overkill ’ for two whole months . In some weeks , as much as eight times the standard recommend amount was used – not 25 specimens per square meter , but 200 .
A daring approachThe coming helped , conclude Peter and his advisor Gerard Buitelaar in September . Peter continues , " So far , it has gone well . There was a corner where thrips was make problems , so we separated that expanse from the balance of the greenhouse with plastic . With local corrective spraying , excess catch cards , and pheromones ( LuremTR ) , we made sure that the eruption could n’t spread any farther . "
The attack that Porta Nova took was daring . " If it had plump ill-timed , we ’d have had to go back to pesticide , but they had ceased to offer us any flexibility . The bit of pesticide is circumscribed and there are so many restrictions on their enjoyment . pesticide are not the agency to resolve your problems . In add-on , a crop with fewer pesticides performs better on all front , which intend roses of the highest quality . "
Gerard Buitelaar : ‘ We practice rinse samples to supervise population development in the beneficials . ’
Monitoring with rinse samples"We use rinse sampling to keep track of the populations of beneficials , " explains Gerard Buitelaar . " That way , we always know whether we have enough beneficials in the crop or not . It ’s the effective way to go about it . As already posit , White Naomi is a full and denser harvest than Red Naomi , and thrip and other plague can easy enshroud . "
They also fitted worm netting with Montdo - Mite , which moderate the Transeius montdorensis predatory mite , in locating where potential hotspots could occur . Peter continues , " In addition , in our newest greenhouse , which is 2x 4.3 hectares , we have also set up an irrigation pipage at the bottom of the rose bed . We can then add a Beauveria bassiana - based heart and soul to the water and keep the fallen leaves wet . The active fungus in that product deal charge of the thripid , prevent an infestation from the land . "
A necessary investmentPeter points out the immense importance of thorough scouting . The four scouts train every week – the even - count way in the even - numbered calendar week , and the unpaired identification number in the odd week . " They are very alert . A structured approach like this works , we never have any surprises . Spider mite , aphids , whitefly , and caterpillars do not do major job in Porta Nova roses . Mildew remains hard , but we take on the fungus in White Naomi in a routine of means . "
In improver , Peter stays in trace with nearby farmers . They were yield a tour of Porta Nova , after which they agreed to persist in spot about activities on the landed estate . Peter bear on , " This gave us the chance to take other thing into account . free-base on wind commission , we can pull the window closed and switch the temperature reduction on . We can also bestow in roof sprinkler and ascertain outside the greenhouse with grab card . This way , we can prevent thripid from get in and bar them damaging the flowers . "
According to Peter , the big addition of 2020 amount from the overall approach that they consciously chose to follow – an overkill of Limonica , local correction , and continuous scouting . " The impermanent overkill was an investment , a requisite to bring the use of goods and services of pesticides to an final stage . But , we have found a balance and now use normal amount of Limonica . Everything is designed around keep that balance , and it seems to be working well . It ’s much easier for me to take the air through the nursery now . "
White Naomi at the leg at Abraham Kroesweg 31 . The cooling unit can be discover above the harvest .
The world ’s number 1Porta Nova produces around 60 million Naomis every year , work it the world ’s largest producer of the cultivar . The company sends only the highest quality works to the market and is committed to that determination by giving a quality guarantee on all of its rose . Porta Nova is owned by Leon Dukker , Nico van Vuuren , his boy Stefan van Vuuren , and Aad van Luijk .
The caller seek to ensure the low potential ecological ‘ footprint ’ per rose . The new nursery locate at Abraham Kroesweg 31 cultivate wholly without born natural gas or temperature reduction . Porta Nova also try the high spot on the podium when it comes to sustainability .
For more info : Koppert Biological Systems[email protected]www.koppert.com
