Showing posts with label microphotography. Show all posts
Showing posts with label microphotography. Show all posts

Wednesday, March 12, 2014

Microphotography: Hippeastrum Pollen and Mystery Substance

I'm still trying to figure out a way to get good photos through the microscope. It may well be the case that no such way exists with the current microscope and camera, in which case I'm wasting my time trying, but for now, I have not yet decided that it's hopeless.

Part of the problem is that I lack for subject matter that I think you guys would find interesting. I could get plenty of pictures of scale insects, I suppose, but for the most part, anything I can see with the microscope is what I see with my naked eye, but bigger, which means my camera can get pictures reasonably well already.

Pollen is an exception. I can't tell much about pollen aside from its color with my naked eye, and sometimes I can't even determine that, but the microscope magnifies it just enough to see shapes. Hippeastrum pollen happens to look just like yellow rice.


And there is so much of it, too. Though I didn't try to get a picture of that.

I did try to self-pollinate the Hippeastrum, but it didn't work. The petals and sepals dried up, and the base of the flower swelled like it's supposed to, all as expected, but after about a month, the whole flower stalk turned yellow and mushy, then flopped over. Oh well. It was trying to save me from myself, no doubt.

The microscope has also proven itself useful a number of times during suspected bug infestations. My Anthurium schlechtendahlii, in the husband's office, was getting a thorough inspection a while back because I'd found scale on a plant on a shelf above it, and I saw this weird white stuff.


I didn't think scale eggs were big enough (or abundant enough) to be visible like this, but I didn't know what else it could have been. So out came the microscope again, and I got these pictures:



The texture made me think of spittlebugs. Spittlebugs indoors would be unusual, but ever since the caterpillars, I don't rule anything out. On the other hand, spittlebugs produce a lot more froth, the froth would be easy to move around on the leaf, and spittlebugs wouldn't put the froth out in the middle of a leaf: they're pickier about location than that.

So it was a mystery for a while. But then the husband noted that the contractors had been in his office a couple months before, and had sprayed various substances in there, so it was probably (his theory) spray-on wall texture stuff. (Would it have been beyond our capabilities to cover the plant shelf with plastic before stuff got sprayed in there? No it was not. But we didn't do it.) So unless the A. schlechtendahlii is suddenly covered in some new kind of bug in the near future, I'm assuming that this is contractor-related, case closed.

Still haven't made any determinations as to the identity of the mysterious Aglaonema mites. I did wipe them off the affected plants with rubbing alcohol and a paper towel, after that post, and they've stayed off of some plants but not others. (Which is what I expected: I didn't think one time would be enough to get rid of them.) So I don't know what's going on, and possibly never will.

Side note: apologies for the relative dearth of posts lately. I especially apologize for not posting right after finding out how many of you just check in with the blog every day instead of using a feed reader. There are four reasons for the silence:

1) I've just felt really run down lately, as happens from time to time, and then Daylight Saving Time had to happen and screw everything up even more. When I invent my time machine, first thing I do is go back and kill George Vernon Hudson. Entomologists are always ruining everything.
2) The orchid show is this coming weekend (15-16 March) and I'm trying to water stuff faster than usual so I can be ready for that. It's not really working so far, because of the tiredness, but the intent is there. This is also going to keep posts slow for a while, since sorting and scheduling the orchid pictures is always at least a week's work.
3) I mailed out Coffea seeds and Leuchtenbergia seeds on Monday, which took up a bit more of my time. And then
4) New Anthuriums produce buds almost every week,1 and it's getting harder and harder to keep up with who's doing what when, so I'm trying to set up some notebooks so I can keep track of each one individually. And then I decided to make the project more complicated, because . . . I always decide to make everything more complicated. So it looks like that's going to take a long time to sort out.

But posts will return eventually, I promise.

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1 The most recent set of buds (from March 3 and 11):
Wes Coast (#273) -- light pink?
Audrey Quest (#63) -- red
Jujubee (#280) -- light pink?
Chad Michaels (#5) -- dark red?
Mason Pepperspray (#202) -- ivory, so maybe eventually light pink?


Tuesday, January 28, 2014

Question for the Hive Mind: a new bug

I did not ask for a new bug. And if I had, I would have been asking for a new bug to replace the scale, not a new bug to add to the scale, much like Huey Lewis wanted a new drug to replace the problematic drugs he had previously tried, not because he wanted more variety in his drug use.1 And yet.

The problem is that I don't actually know what new bug I have, nor how to make it go away. So I'm asking y'all for thoughts.

Relevant details:

It seems exclusively interested in Aglaonemas, and only two or three varieties of Aglaonema to boot.2

It looks basically like household dust. In fact, it looks so much like household dust that I've been assuming for quite a while that that's what it was.

The overall orange/red tint to the photo is because of the light source I was using, and is not the actual leaf color.

The dust hypothesis didn't actually make that much sense, because it was only ever on certain specific leaves, and was sometimes accompanied by weird brown-orange discoloration at the leaf margins.

When I tried to find an unaffected leaf for comparison purposes, I noticed that all the leaves seem to be doing this to some degree or another, but I think the picture above gives the general idea. They all eventually wind up looking like the leaf on the left, but are supposed to look more like the leaf on the right.

I don't know why the margins would be discolored, though, as the bugs seem pretty evenly distributed across the whole upper surface of the leaves.

There were also frequently sticky droplets of something or another. The droplets didn't alarm me terribly, because a lot of my Aglaonema varieties produce sticky droplets on the outside of the spathes when they produce flowers, and I first noticed the "dust" as the first affected plant was flowering. I'm still not 100% convinced that the droplets are related to the bugs, actually.

It doesn't seem to be particularly harming the plants, aside from the marginal discoloration, and the margin thing has really only been going on with 'Emerald Bay.'

So why do I think there's even a problem? Because I checked the leaves out with the microscope. As usual, getting decent photos with the microscope is nearly impossible, so forgive the quality, but you can see a couple mite-like things in the center of this photo, a relatively in-focus third one just above and barely to the right of those, and pieces of blurrier ones here and there around the periphery of the photo.


Which, it looks like an arthropod, not an insect: blurry though the picture is, it's pretty clear that they're holding four legs in front of the body, and either one or two pairs behind it. Plus there's that overall tick-/ mite-shape going on.

Obviously there are many, many species of mite, but the only ones I know of that make a habit of attacking houseplants are the two-spotted spider mite and the cyclamen mite, and I don't think these are either of those two species. Under the microscope, spider mites are 1) much larger, 2) yellowish and opaque, instead of translucent white, 3) inclined to stay mostly on the underside of leaves (these mites are almost 100% on the upper leaf surface), 4) detectable by the visible webbing they create, and 5) will move while you're looking at them under the microscope. I've never directly observed cyclamen mites under the microscope, but the pictures that come up in Google are of rounder, smoother creatures with stubbier legs. Cyclamen mites mostly look like white jellybeans, as far as I can tell, which these do not.

It's conceivable that I'm actually seeing the dead skins left after the mites molted.3 That's happened before, with the deep-sea crab/skeleton/spider/ghost things (probably actually aphids) I talk about at the end of this post, and would explain the translucent whiteness and lack of movement. I am also willing to entertain the possibility that my Aglaonemas are being haunted by the ghosts of deceased spider mites, because that likewise explains the translucent whiteness and makes about as much sense as anything else.

Of course I've Googled. There's plenty out there about spider mites and Aglaonemas, but nothing about any other kinds of mite.

So far, I've tried imidacloprid (when I was putting imidacloprid in all the plants), which definitely did not get rid of the infestation, and wiping the leaves with rubbing alcohol and a paper towel, which I did too recently to know about its effectiveness. (My guess: yeah, it'll probably work, but I'm going to have to do it several more times.)

So what about it? Anybody seen anything like this before? Have any suggestions for what I could do to find out what I've got, or how to make them go away? Suggestions for dealing with spider mite ghosts are especially welcome, since Google is as silent on the topic as you'd expect.

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1 Side note: it's a little peculiar that he's asking for "one that makes me feel like I feel when I'm with you." 'Cause, you know, if you've got that in drug form, then you don't actually need the girl anymore, right? I mean, wouldn't it make more sense to just spend a lot of time with her, since she already exists and makes him feel exactly like he feels when he's with her, rather than asking the world's chemists to go to the trouble of inventing a whole new drug with these super-specific effects? I think about these things. Maybe Huey Lewis should too.
2 Almost all of it has been on 'Emerald Bay,' which is in my office. Also affected: 'Golden Bay,' 'Diamond Bay,' and 'Brilliant,' all of which are in the living room. 'Gold Dust,' which sits right next to 'Emerald Bay,' and has been for quite a while, doesn't seem to have the problem at all, though.
3 If you're into video of spider mites running around and molting -- and who among us isn't? -- check this out:


Monday, August 12, 2013

Microphotography: Portulaca grandiflora

I'm unclear on the specifics of where and how, but the husband, knowing that I've been looking for a microscope for some time, somehow obtained a used one for me. Which is one example of how he's the best husband ever.


The catches -- and of course there are catches -- are:

1) Okay, I don't know the proper names for anything here, but I'm going to call that thing in the middle, with the four things sticking out from it, the microscope's "udder," because that's what it looks like. Each of those barrels on the udder has a different level of magnification (I don't know what levels of magnification, because I cannot decipher what the barrels say), only two of which appear to function.
2) It's a regular, old-school, 1960s-ish microscope, so it wasn't designed with digital photography in mind. If the camera lens is not exactly centered over the eyepiece, the camera doesn't register anything being there at all. Likewise if it isn't precisely the right height above the eyepiece. My hands shake way too much to get pictures by holding the camera in the right spot myself, and although we do have a tripod, the base of the microscope is just large enough to get in the way of the tripod's legs, so I can get within about a centimeter (0.4 in.) of the eyepiece, but then no further. Except! When I took the below pictures, I actually could get the tripod directly over the eyepiece. I just couldn't do it again a few days later when I moved the whole thing outside to try to get a better set of pictures in stronger light, and I don't know why, and the whole thing was very frustrating. Which leads us to the third problem, which is:
3) Even when I do manage to line the camera up, using the tripod, the amount of light coming through the eyepiece is small, so my camera uses long exposure times, which results in blurry pictures, even at its best.
4) And at its worst, the camera autofocus chooses to focus on the eyepiece itself, instead of the image in the eyepiece. Or it focuses on some part of the microscope outside the eyepiece, so I get a perfect shot of the top of the udder but the actual image I'm trying to capture is too fuzzy to make out.

So the point is that there are some problems with this, and you should, consequently, not expect to see a lot of these pictures until such time as I can figure out how to get better ones. And I would love some suggestions from other people, because I know there's got to be someone out there who's taken photographs through a microscope's eyepiece successfully.

Having said all of that, there have been some pretty cool moments with the microscope already, which I will hopefully be able to share with you someday. Portulaca grandiflora seeds, my only successful photos to date, turn out to be much more interesting than the gray, metallic dust they appear to be with the naked eye. For example, I had always imagined them as more or less spherical, since a lot of seeds are, but they turn out to have a specific, weird shape, somewhere between a comma and a nautilus:


At the higher magnification, they also have an unexpected texture, which is probably the coolest and most surprising thing I've seen in weeks. It didn't photograph well, of course:


The pattern is sort of approximately that of a bunch of tiny interlocked cogwheels, covering the whole surface of the seed. Which is even stranger in combination with the overall iridescent metallic gray color. (I now suspect that Portulaca grandiflora are robotic plants.)

I also tried for photos of the pollen, but that went even less well, and wasn't very interesting:


And those are the only actual pictures I'm able to provide to you at this point. Possible coming attractions, if I can figure out how to take the pictures:

A lot of leaves are hairier than I would have guessed. (Pedilanthus being the most surprising.) Though most leaves are disappointingly boring.

The serrated edges on Yucca guatemalensis are a lot less regular in shape and spacing than I expected.

Cryptanthus pollen is even more dull than Portulaca pollen: basically just irregular little white rounded things. At least Portulaca pollen has a color to it.

Ceropegia woodii flowers look exactly the way you would expect them to look, and brought to mind both "eyelashes" and "houseflies." Aeschynanthus speciosus flowers are boring and look just like they do with the naked eye, except bigger. Neofinetia roots didn't do much for me. (Think "styrofoam.") The Euphorbia fungus (yes, I still have Euphorbia fungus) looked exactly like I expected (sort of a creeping white net), and was dull.

Broadleaf plantain (Plantago major) really does have flowers (when you let it bloom), and the flowers are actually sort of pretty. I mean, if they were twenty times bigger, you'd grow the plant as an ornamental: there's a white, fluffy bottlebrush sort of stamen, with lots of white spherical pollen grains, and then the stigmas, or something I take to be the stigmas, are sort of shaped like white tulips with purple stripes down the center of each petal. (Plantago major is high on the list of stuff to get pictures of, whenever I figure out how to do that, but you can get some idea from the picture here at Wikimedia Commons. There must be some natural variation, though, because that's a darker, solid purple than what I was seeing.)

Another high-priority item: Anthurium spadices. It's a little easier for me to believe that those are flowers, now that I've seen them close-up. (I'd link to a photo, but I couldn't find one easily on Google image search.) It should probably be noted that they're still not pretty. At best, interesting.

Spider mites are every bit as horrifying as you'd think they would be, and they will continue to suck sap out of a leaf even after it's been removed from the plant. They also do this weird thing where they either shake their back legs like a dog getting a belly rub, or they rub their rearmost pair of legs together like a person trying to warm their hands. I only saw it do that once, and it was fast. I was so surprised and freaked out by there being, suddenly, movement, that I can't tell you exactly what it was. It also convinced me to throw the leaf in the trash more or less immediately afterward.

I think I've seen spider mite eggs now, though they weren't all the same color, so I'm not 100% on that. (They were all somewhere in the yellow or yellow-orange color range, but the darkness varied a lot, from pale yellow down to almost black.)

Some unknown white thing that was on our lettuce was one of the scariest things I've ever seen. It somehow managed to evoke deep-sea crabs, skeletons, spiders, and ghosts simultaneously, and I'm pretty sure seeing them come into focus in the microscope took a year off my life. The best match I found on-line for them was here, on a forum where they were identified as the shed exoskeletons of a molted aphid here. (The pictures at the link aren't magnified enough to be upsetting, FWIW.) So "skeleton" and "ghost" were actually pretty close. That also explains why they weren't moving.

So the point is, there's a lot of potential for interesting new posts, if only I can figure out how to get the pictures. It's going to take some experimentation, and I only have so much time, so if anybody has any relevant expertise, I'd sure appreciate hearing from you.