" The climate in the greenhouse is precisely what I had hoped for , " states René de Bakker when asked about his first experience with insect veiling . In March , the Dutch chrysanthemum grower had SchermNed ’s insect interlock filter installed at one of his three locations . In mid - July , the agriculturalist was already escort what he wanted to see : " On the hot days we did have , it did n’t get hotter in the nursery with meshing than in the one without . "
Maintaining ventilation capacityTwo years back , Gebr . Nederpel started thinking about seat in insect veiling . " We looked at harmonica netting , as you see a passel in vegetable nursery . However , we thought it was a disadvantage that the temperature in the glasshouse would then be a bit eminent . In our opinion , we would drop ventilation capacity anyway . "
After coming into inter-group communication with SchermNed , the choice fell on their insect mesh filter . At that time , the growers had also heard experience from colleagues , include those of a nursery , and a caller that need to keep moth out . " Both companies were very positive . Their crops are unlike , but they have the same problems . We could make good enjoyment of their experiences . "
Keeping bird louse and thrip outIn the passel chrysanthemum greenhouse , lice and thrip out are the two main pestis problems . " There are increasingly fewer product that can be used , so you have to depend at how you may keep these little critters out , " René concludes staidly .
In terms of mesh size , the choice fell on 0.27 x 0.77 millimeter . " The stock size , " suggest Carl Stougie , sales manager at SchermNed . " It is the size that many growers can work with . " Insect netting is not yet widely used in pot chrysanthemum greenhouses . Nevertheless , here , the entire nursery was screen off . Carl : " That gives a dependable indication than when you set forth test in one or a few departments . "
The great deal chrysanthemum grower uses the insect mesh filter to keep out aphid and most of the thrip . " If thrips fly in with their wing open , they wo n’t enter our greenhouse . If you want to keep all thrips out , it ’s better to keep the windows closed , " he laughs .
Rainy springSchermNed installed the insect meshwork filter . The initiation required opening the push projection screen of the greenhouse . As soon as the outdoor climate allowed , the installers could get to work .
It has been a bit quieter than other year in terms of pest pressure due to the showery outflow and the continued absence of prolonged summer weather condition in mid - July . With the large amounts of rainwater and blue weather , it was more humid than normal , though . Neverthless , after several calendar month , René is pleased to conclude that the louse netting is doing what it is conjecture to do .
More importantly , he ’s also happy with the greenhouse clime . " I am very felicitous with the air movement under the netting , and that we have air exchange . We observe that , and I also see it ruminate in the data of the climate information processing system . " He does feel that wet lallygag a small easier in the greenhouse . It help oneself that already invested in dehumidification systems . Without those dehumidifiers , however , would he also have dare to choose dirt ball netting ? " Yes , " enjoin René confidently . " But the fact that we already had dehumidifiers makes it easier . "
PoinsettiasOne of Gebr Nederpel ’s three sites has now been netted off , with the help of a patch of subsidy . In about three yr ' time , René hopes to have nett installed at all localization . Because the placement with mesh is next to one without , René can make good comparisons . " A few weeks back it did get really hot for a while . Then the temperature rose in both glasshouse , but it did n’t get hotter in the glasshouse with an louse meshwork filter . It is just as cool as in the greenhouse without mesh topology . "
Next wintertime , Gebr . Nederpel will also grow Christmas flower again . During the winter , the agriculturist , who likes to sustain a temperature of 18 degree Celsius in his greenhouse , does not air out much . In terms of insect pressure , he ask to make a big step when it comes to whiteflies . That is a challenge in poinsettias . " presently , white fly pressure is grim , and I expect that louse netting also helps to keep the pressure down much well-situated . That way , we may also be able-bodied to save toll on biological control . "
For more information : SchermNed B.V.+31 ( 0)174 62 22 14[email protected]www.schermned.nl
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