Edible oil droplets trap bugs without the harm to people and wildlife that synthetic pesticides can cause
The insect glue, produced from edible oils, was inspired by plants such as sundews that use the strategy to capture their prey. A key advantage of physical pesticides over toxic pesticides is that pests are highly unlikely to evolve resistance, as this would require them to develop much larger and stronger bodies, while bigger beneficial insects, like bees, are not trapped by the drops.
The drops were tested on the western flower thrip, which are known to attack more than 500 species of vegetable, fruit and ornamental crops. More than 60% of the thrips were captured within the two days of the test, and the drops remained sticky for weeks.
Work on the sticky pesticide is continuing, but Dr Thomas Kodger at Wageningen University & Research, in the Netherlands, who is part of the self defence project doing the work, said: “We hope it will have not nearly as disastrous side-effects on the local environment or on accidental poisonings of humans. And the alternatives are much worse, which are potential starvation due to crop loss or the overuse of chemical pesticides, which are a known hazard.”
A key advantage of physical pesticides over toxic pesticides is that pests are highly unlikely to evolve resistance, as this would require them to develop much larger and stronger bodies.
Insect body size is dictated by oxygen levels, and since they absorb oxygen through their skin if they get too large with too little oxygen they suffocate.
Natural selection is usually implied. So, in long form, smaller insects would have to be less reproductively successful, and that's hard when you're a pest that really benefits from being tiny, stealthy and energy-economical.
You are correct, but having spent 7 years of my life learning general chemistry, biochemistry, and organic chemistry.... I will fight with my last breath that chemicals exist.
To play devils advocate, lets say we "agree" that "no chemicals" means no harmful chemicals.... now we have given corporations the weasel defense to say anything has "no chemicals" because they will define away any measure of harm.
Pointing out the incorrectness of the article doesn't mean it has no merit, but now the critical reader must be extra cautious because the author has demonstrated very poor domain knowledge, and their conclusions are suspect.
You don't serve the greater good by misusing words. A new sticky substance as an alternative to chemicals? If you want to educate people through your reporting, then you try to make it accurate and choose words carefully.
It doesn't invalidate the whole article, fair enough. But it does make a "wise" person question what else they got wrong.
But it does make a "wise" person question what else they got wrong.
No, because a wise person would understand that the journalist understood the audience they were speaking to, ie: the general public, and used the proper verbiage.
I've watched chunks of society freak out over everything from basic food ingredients to vaccines because they contained polysyllabic words that people decried as "chemicals".
And I've spent my whole damn life listening to people abuse the word "theory" until the the Christofascists and neo-nazis managed to become mainstream.
People abuse technical words with a purpose. Don't play apologetics for them because you believe their understanding of words is more nuanced than they are.
You don't understand, this new pesticide consists of tiny leaflets with stories so complelling the insects cannot stop reading them. They are literally (not literally) glued to the page.
edit: and yet the leaflets would be made of chemicals and in the long run would be harmful
It just really feels weird to me to describe something as GLUE, but then also say that it doesn't use chemicals. One thing I take into consideration most times I'm using glue, is whether the item I'm gluing will be melted by the glue.
I get what they're trying to say, but glue is a description of a chemical compound in my mind.
While I agree in principle, the people who write the headlines are very often not the writers of the article or the people who are actually working on the solutions to the problems.
We gotta start somewhere. Remember that food security is a big part of the issue as well. We can't just stop spraying the toxic stuff without an alternative because global food systems could collapse. I don't like that we were using the toxic stuff in the first place but it has become a cornerstone of our food production.
We can’t just stop spraying the toxic stuff without an alternative because global food systems could collapse.
Food security isn't an issue of production but rather distribution and specifically equitable distribution; 2. It's estimated that 40% of all food produced in America is wasted;
So given #2, what is the reduction in yield that would result from not "spraying toxic stuff" and is it more or less than 40%? The answer is very like no, not even close and further, this is that a "collapse" of food systems or a collapse of corporate profits?
The issue is that sticky traps are non-specific. Any insect the size of a trip can be trapped. Then when predators are attracted to all the free food, they are potentially stuck or damaged as well.
Thrips are also one of the easiest species to control using predatory species.
They are if the stickiness is tuned so that larger, predatory insects are easily able to escape the glue.
Most beneficials that go after thrips are not that much bigger than them. The study doesn't seem to mention this (tho I'm still looking for the full text).
Edit: Apparently this isn't so obvious to people. Ok, let me explain:
No pesticide can be precisely targeted. You will always capture or kill more insects that are beneficial than are not. In the article it mentions that the sticky spray doesn't capture bigger insects like bees. That's certainly progress over other types of physical traps, but not all insects are very big. Key beneficials like lady bugs, green lacewings, various spiders, pirate bugs, etc are very small. They will be trapped by this spray. If it traps a thrip, it will trap those bugs (and the study abstract says this - "small anthropods"). This isn't mentioned in the article but I can speak to this from personal experience farming. I've tried various options and the results are always the same - you may get rid of some thrips (and boy do I have thrips) but you also wipe out the insects that will eat the thrips and you end up in a kind of arms race. The more beneficials you kill the more pesticides you need.
We can have less efficient agriculture that doesn’t require indiscriminate killing of species.
Thank you!
One of the big lies of modern industrialized agriculture is that we have a production problem. We don't! We have a "profit problem" in the sense that industrialized food producers demand ever greater profits which means they have to continually find ways to get people to eat more "value", in volume and/or value-added processes.
In reality we have a distribution problem that is caused by industrialization and centralization. The real solution is decentralization and diversification.
When I worked in Ag. Research we had a big international field day. People from 50+ countries visiting in. I got the wonderful job of doing presentations in the field all day long. This was in late summer on a bad thrip year.
Well, one of the office goons decided that they would order all the staff polo shirts for the three day event. We were all supposed to wear the same color on the specified day.
They ordered in a light blue, yellow, and green polos. The first day was to be light blue. I "accidentally" wore the green one instead and had a few very irate office goons on my back first off that morning. Strangely enough all of the experienced outdoor staff "accidently" wore the green shirt as well.
For those that don't know, thrips are highly attracted to light blue and they bite. I laughed my ass off most of the day.
The following two days everyone wore green. Except for the one determined office goon who wore the yellow shirt. In a field full of honeybee hives...
It's not because they're gross, it's because they eat our food. And we grow monocultures so it's a perfect breeding ground for pests. Also if you read the article the new pesticide is physical and doesn't harm large predatory insects.
It will harm any insect the same size as the target ones. Insects have so so many ecological benefits, as pollinators, as part of the food chain, as unique and amazing creatures in and of themselves, they may contain chemicals and biological systems we don't yet understand but that future generations will benefit from the knowledge of. We need to protect our biodiversity.
No pesticide that physically traps insects is specific to one kind. It's not really possible. It may not capture bees, but it will capture other smaller insects than thrips that do no harm. For example green lacewing larva.
It’s literally in the post. Not even in the article, it’s in the synopsis. Why didn’t you read that before commenting?
Can you be more precise? When you say "it" is "literally in the post" what exactly is "it"? Serious question because yes I read the article.
I would surmise that you are referring to the line "while bigger beneficial insects, like bees, are not trapped by the drops".
The problem here is the word "bigger". So great, it doesn't trap bees, that's something of a step forward. But it will trap other non-targeted smaller insects.
Um. No kidding. Did you read the article? (Edit: that I linked to)
This year again, we released green lacewing larva in the Public Garden, the Boston Common, and Commonwealth Avenue Mall. As generalist predators, the tiny larvae (Chrysoperla rufilabris) provide a vital service by eating aphids, small caterpillars, beetles, thrips, mites, whiteflies, mealybugs, and even insect eggs.
Edit: My point, which seems to be completely lost on most people here is that no physical means of trapping insects is going to only target the problem insects. You will always capture more of the insects you didn't mean to harm. Source: me, having tried sticky traps and various oils in commercial farming settings.
You end up looking at economic thresholds and add on some of the beneficial as part of that equation. If the bad bug destroys the crop entirely, then there's nothing there for the beneficial to benefit.
And yah, yah, its not all about the crops, but in the end, it's all about the crop or people are starving.
Yes that headline is extremely moronic, I don't get how you are downvoted for pointing out the headline is factually wrong??
Just because the insects aren't killed by the toxicity of chemicals, they are captured by them in the form of glue, which is also a strong chemical device, and remains potentially harmful.