Predatory mite is an important asset in combating spider mites


As a cultivation advisor for strawberries, soft fruits and greenhouse vegetables, Paul van de Ven knows only too well that spider mites are a big problem. “This pest is a major point of concern for the companies I visit. This is because spider mites can significantly affect plant growth. And if you don’t do anything, the plant will die completely at some point, ”explains Van de Ven.

He advises his customers to use Spical, consisting of the predatory mite Neoseiulus californicus, as a basis for combating spider mites. “This slows down the development of spider mites. If these harmful beetles do multiply, Spidex was the product of choice until recently. The predatory mite Phytoseiulus persimilis has been an important asset in combating spider mites for many years. ‘

Earlier visibility of the population
According to Van de Ven, the introduction of Spidex Vital is an important step forward to better control spider mites. “We see that the bugs delivered to customers are stronger and more forceful, which means they are more active and have more energy when they“ go into battle ”. It used to take you a few weeks to notice the Phytoseiulus persimilis population in the crop, but the beetles are now visible much earlier. And that also means that the predatory mites can react faster and better to spider mites, which leads to better results. We will therefore switch from Spidex to Spidex Vital for all of our customers in the near future. ‘

In terms of advice and monitoring, little has changed with the changeover to the new wording, said the consultant. “We still follow the same guidelines for dosing and so on. The fact that the predatory mites are white at the beginning is not a real problem with monitoring. Many other predatory mites are even lighter in color. And in my experience, the mites will soon turn a red-orange color, which means they are doing a good job. ”

Less chemical corrections
Van de Ven believes and hopes that Spidex Vital will also reduce the need for chemical procedures. “As I said, it usually took about two to three weeks for the population to reach the required level and for the predatory mites to start their work. Often times, the spider mite population would develop rapidly during this time. This is especially true in dry weather: when there is little humidity and lots of sunshine, spider mites are in their element. Sometimes they developed so quickly that chemical intervention was necessary. Since the predatory mite population in Spidex Vital develops faster and the spider mite control starts faster and better, we can hopefully keep the infestation better under control and reduce the number of necessary chemical corrections. We shall see this spring whether this is actually the case, but I personally assume that it is. The main strength of this innovation lies in the fact that the predatory mites can start their task faster and more energetically. ”

For more informations:
Koppert biological systems
[email protected]
www.koppert.com

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