ZUMSIL®, liquid plant nutrient is a silicon polymer, which is the result of an intermediate reaction of silicon and hydrogen; this Ionized Activated Silicon liquid is a complex of Silicon (Tetrahedral Polymer) with a high saturation of stable hydrogen. It is a dark Brown/Blackish odourless liquid plant nutrient that contains 20% (+/-2%) Si as monosilicic acid.
ZUMSIL® as a preventive measure
Figure 1. Silicon mediated mechanisms of plant resistance to insect pests. (PPO) polyphenol oxidase, (PAL) phenylalanine ammonia lyase, (HIPVs) herbivore-induced plant volatiles, (JA) jasmonatephytohormone
It has been shown by research that Si has a central role in boosting plants’ direct and indirect defences against many insect pests via two Si-based mechanisms: strengthened physical or mechanical barriers and biochemical/molecular mechanisms that induce plant defence responses. The relevant studies have been performed in various plant species, often using insects with diverse feeding strategies. Taken together, we draw the overall conclusion that plants employ both Si-based resistance mechanisms synergistically rather than singly, relying on combined physical, chemical and biochemical mechanisms to reduce damage by insect pests.
It also seems that Si-mediated mechanisms act similarly in plants both below and above ground, as Si induces lignin accumulation in the roots of both sugarcane (a monocot) and oilseed rape (a eudicot), increasing toughness and, eventually, resistance to insect attack. Though the accumulation of Si differs among plant species, they likely display similar Si defence mechanisms against insects. Similarly, monocot and eudicot species seem to respond similarly to insect attack through similar Si-mediated mechanical and biochemical mechanisms.
Chewing insects are more susceptible to Si physical barriers than are phloem feeders, as the latter may be able to avoid the phytoliths but we cannot dismiss the possibility that plant tissue injury resulting from the feeding itself may trigger the battery of Si-induced plant responses.