Stefan Groenewegen and Richard van der Salm met in secondary schooling and have been working together for about 20 class now on spring up solutions for their anthurium . Their caller Groene Tint has existed since 2007 , but Stefan ’s grandfather laid the foundation as early as 1936 in Naaldwijk . Now , Groene Tint ’s greenhouses are settle in Tinte , and Stefan and Richard jointly own the company . Stefan focuses mainly on refinement and maintenance , while Richard is more concerned with sale and crop protection . In January , the caller begin grow its tailflower as organically as potential . chemical substance are only used as a last option to adjust .
require for biologyLike all garden companies , they notice that fewer and fewer imagination are available and will only become few in the future . With the utilisation of other , less strong agents , the thrip pressure of pepper thrip was arise faster and required more frequent spraying . They discover that they themselves also did n’t wish mete out with chemistry so often . Richard : " If you have to spray twice a week in summer , it ’s quite a puzzle . you could only set forth once the temperature has cut down , and with the hot summers we ’ve had in the past , that imply you finish late . If that then continue for a few months , it ’s not much fun . "
Together with Richard van Spronsen of Van Iperen , they take care at the schedules a lot . " Last year in the summer , when the thrips pressure was very eminent , I often went here to draw up spraying schedules together with Richard van der Salm and hash out which agents worked well and which ones worked a piece less . " Then the option of using biology also follow up . " It was clear that we had to go in a different direction , and with biology , Van Iperen has the necessary experience by now . "
That ’s where Marjolein van der Knaap come in . Around that time , Marjolein , who mould at Koppert , was research the habit of biology against pepper thrip . This was also the form of thrips Richard and Stefan were suffering from in their finish . These Madagascar pepper thripid pose a major threat to the crop . Besides concealment and thus being hard for predatory mite to find , they cause major damage in minor telephone number . ab initio , very little was known about these exotic thrip , which is why Koppert set up trials in quislingism with a figure of partners to find the good biologic control agentive role . And with results . Marjolein says , " It is still a work in advance , but I presume say that predatory mites are a very secure basis against pepper thrip , among other thing . "
ApplicationApplying predatory mites is mainly done preventively , excuse Marjolein : " you may only tolerate a small amount of pepper thrips , which is why it is significant to invariably have a high predatory soupcon population . " deploy those predatory mites is done at different leg of cultivation in dissimilar way . To start with , predatory grease mites are deployed the moment the anthurium cuttings arrive . Should thrips pupae already be present at that meter , the Macro - Mite dirt predatory mites immediately target the pupa . Swirski - Mite is then deployed with the Airobug blower against the thrips larvae in the plant . In the final phase angle of culture , bags containing the Swirski - Mite LD are mainly used . This debar residue when the plants go to the purchaser . Throughout the process , the predatory mites are supplemented with a combination of Nutari affluent mites and Artefeed .
Development remains necessaryRichard van der Salm : " Overall , we are slaked with how things are move . It sure enough went very well in the first one-half of the year . After that , partly due to the ongoing extreme warmth , we had more problems with thrips atmospheric pressure . " So the solution against thrips is sure as shooting not yet set in stone . For representative , some varieties of anthurium are more sensitive to pepper thrip than others or show damage earlier . On some variety , thrips pressing was even so high that Richard and Stefan decided to stop grow them . There is also still a search for a fashion to battle the thrips once they are mature . Marjolein : " We are now also look into what role overtake cards and attractants can flirt in controlling adult thrips . "
by the way , rude enemies have not only been used against thrip . Parasitic wasps ( Aphidius Colemani ) and bile midge ( Aphidoletus Aphidimyza ) were also deployed against aphids last year . With success : barely any aphids were spot in Stefan and Richard ’s tail-flower .
Even though there are still plenty of studies afoot , Richard van der Salm is enthusiastic about the biological scheme : " Considering the hereafter , it is important to delay engaged with this kind of thing as a grower as well . "
For more data : vanguard Iperenwww.iperen.com[email protected ]
