In the field of phytosanitary issues, attacks by phytophagous spiders are perhaps the most significant in terms of agents that interfere with good post-harvest in cherry trees.
Given the characteristics of these pests, of having a dynamic, explosive and exponential reproductive potential, plus a known effect of foliar necrosis caused by their stinging and sucking digestive system, which can even cause foliar abscess, these are all undesirable effects derived from this.
Why apply acaricides also in post-harvest in cherry trees?
First, because in summer the favourable conditions for its development become more acute, especially high temperatures; second, to avoid its hibernation, which enables the early appearance of its populations in spring, causing damage to the flower primordia; and third, to avoid entering the production process with the presence of high populations of the false red vine spider mite – considered a quarantine mite – which will increase the risk of rejections for export.
What do we offer at Gowan Chile for the successful control of these pests?
Two acaricides with common but also differentiating characteristics.
Among the former, both Envidor 240 SC and Magister 20 SC control all species of spider mites; they control all stages of the same; they are original brand products; and their efficacy, phytocompatibility and miscibility have been validated and used for a long time in the country.
Among the latter, Envidor stands out for its long-lasting protection effect, while Magister does so for its significant knock-down effect, without detracting from its residual effect; so, when faced with populations greater than the critical thresholds (4 to 5 spider mites on average per leaf), Magister should be preferred; leaving Envidor to be applied preferably against medium to low populations and taking advantage of its weeks of protection (five to six).
Both acaricides belong to different chemical groups and can therefore complement each other in their use, which is desirable within the framework of good agricultural and phytosanitary practices, taking into account that they should be applied only once per season.
While Magister does not have generic competition, Envidor (original product) does, but as described by the Agricultural and Livestock Service, they are products "supposedly similar to reference patterns” (SAG Exempt Resolution No. 1557/2014); and as Crop Life International characterizes them, “supporting or generic product that has to provide a much smaller package of technical information than that supplied by the original reference or product”, for registration by equivalence before the phytosanitary authority.
(Pesticide Specifications and Equivalence, Crop Life. 2014. FAO International Code of Conduct for the Use of Pesticides. 2010).
