Light Meters?

[kg5]

Insects will use a host plant especially in a monoculture. They usually use a plant that is unhealthy.

If the way a plant looks to an insect can be determined.

I believe there is two areas of plant health that can be opened up.

One being to understand where the introduction of any given insect appears and then to stop insect presents before them turning into an insect plague.

It also can determine other health issues with a plant to the why it makes a plant look attractive to the insects to start with.

The starting point of this science has been happening for 1,000's of years and that is to look for a weak plants or a plant being attacked by insects in the daylight environment.

Many plant growers have used known insect host plants, as plant to protect their plants of real interest.

For all I know someone has already made some head way in this area but I find it a fascinating area of plant health. Being through the eyes of an insect or a eye of a person.

[DavidCampen]

Originally Posted by naoki

If you can feel the UV-A as "green", I would think the person is a bit abnormal (for a human). Bees (and insects can see UV light). So if you take the picture of flowers with UV light, you can frequently see patterns which isn't visible to human.

It is the cornea in the human eye that absorbs UV. If you have had the cornea removed and replaced with a synthetic you may be able to see farther into the UV range. I saw mention of this in an article in, I believe, "Science" magazine many decades ago.

[naoki]

Good to see you back here, David! It would be interesting that after the surgery, you discover a whole different world which bees can see!

[DavidCampen]

Aphakia - Wikipedia, the free encyclopedia

[DavidCampen]

Originally Posted by naoki

Good to see you back here, David!

Thanks Naoki, but after being so frequently vilified and ridiculed for trying to tell people that Rick Lockwood's potassium toxicity conjecture and the K-lite fertilizer formulation were nonsense; I rarely bother anymore to post here or on SlipperTalk.

[lepetitmartien]

[OT happy to see too you David, but in these subjects, it all goes to trolling and flaming, so impossible to have a decent talk in the end, especially as the subjects is though.]

If we have a UV filtering cornea, mother nature must have a good reason Like cataract And I don't remember if our retina cells can see these wavelenghts.

Now I've seen stills and videos showing the flowers under UV and insects following their markings, so the stuff is around, certainly lab speciality, maybe even custom made save if there's a similar use in industry.

Ideas from simple :

- dark lights (cheap)
- lamps use in forensic (needs eye protection)
- lamps use for deratisation, it show the traces of pee rats make everywhere, may be same as forensic. (eye protection too).

[ma_sha1]

Accurate light meter starts at about $100, a good bang for the buck meter is Extexh EA30. I have one from my last hobby of flashlights & I use it to get measurements at each window for orchids.

I also had a cheaper $30 light meter before that, bought from deal extreme. That Was very inaccurate but consistent, it's about 20% lower reading consistently ok to use but need a good meter to figure out how much off & manually apply correction after each read.

I also tried several light meter free apps for iPhone, reading are all off a lot, 2000 ft cabdles reads 6000 to 10000 range, not able to use it.