Hard Scale?

Slippertalk Orchid Forum

Help Support Slippertalk Orchid Forum:

bwester

Well-Known Member
Joined
Jun 7, 2006
Messages
1,238
Reaction score
0
I have this stuff on some of my plants that looked like scale, but didnt move at all. I would have a pic, but in a panic I released a malathion H-bomb in my greenhouse. What is the difference between hard and soft scale? Is there one that wont move?
 

likespaphs

some call me brian
Joined
Jun 7, 2006
Messages
5,232
Reaction score
11
Location
Cape Cod
in the adult stages, neither move. the immatures, called crawlers, do.
soft scale gives off honeydew (bug poop), hard scales don't.
i think that when one rubs a soft scale with a fingernail, the insect stays stuck to the leaf, while the shell (scale) scrapes off. i think armoured (or hard) scale comes off with the shell when scraped...though i may have that backwards
 

bwester

Well-Known Member
Joined
Jun 7, 2006
Messages
1,238
Reaction score
0
Malathion kills both though, right?
 

Heather

Administrator
Staff member
Admin
Moderator
Joined
Jun 6, 2006
Messages
10,483
Reaction score
15
Location
Sacramento, CA. Outside w/ Southeast Exposure
likespaphs said:
i think that when one rubs a soft scale with a fingernail, the insect stays stuck to the leaf, while the shell (scale) scrapes off. i think armoured (or hard) scale comes off with the shell when scraped...though i may have that backwards
I could be wrong (never had hard scale) but I think you're backwards, I just found a soft scale on my di - it was a good one, had I know Blake was posting this I might have taken a photo before I moshed its little a$$.

There was nothing left behind when I scraped it off - they come off w/ a fingernail - kind of a waxy texture, and light brown. Also dissolve in alcohol. I wish all orchid pests disolved in alcohol. It would make my life much easier!
 

bwester

Well-Known Member
Joined
Jun 7, 2006
Messages
1,238
Reaction score
0
I wonder If you could use seven with orchids? Any input?
 

likespaphs

some call me brian
Joined
Jun 7, 2006
Messages
5,232
Reaction score
11
Location
Cape Cod
i'd use a scale parasitoid or a scale beetle...though, if you've used a pesticide with a residue lately, it may kill the beneficials. i just let a bunch of scale destroyer beetles go. they're tiny, but effective... then again, they're in a greenhouse.

there is stuff called distance. i don't know if it's available to homeowners, i'd have to check, the label, and, actually, never used it on scale, but it's pretty soft and less toxic. used it for whiteflies and took the little s.o.b.'s right out.
there was some phytotoxicity on a plant in the milkweed/dogbane family, though...
 

Rick

Well-Known Member
Joined
Jun 9, 2006
Messages
12,765
Reaction score
3
Location
Leiper's Fork, TN
I've tried several control methods, but the best results I've gotten so far are with Merrit. It's a systemic with a 30 day residual in the plant tissue.

It can be purchased in a premixed spray at Home Depot as a Bayer product called "Rose and Bloom" spray.
 
Last edited:

bwester

Well-Known Member
Joined
Jun 7, 2006
Messages
1,238
Reaction score
0
likespaphs said:
i'd use a scale parasitoid or a scale beetle...though, if you've used a pesticide with a residue lately, it may kill the beneficials. i just let a bunch of scale destroyer beetles go. they're tiny, but effective... then again, they're in a greenhouse.

there is stuff called distance. i don't know if it's available to homeowners, i'd have to check, the label, and, actually, never used it on scale, but it's pretty soft and less toxic. used it for whiteflies and took the little s.o.b.'s right out.
there was some phytotoxicity on a plant in the milkweed/dogbane family, though...
Where can I get the beetles? I have a greenhouse, so it should work.
 

likespaphs

some call me brian
Joined
Jun 7, 2006
Messages
5,232
Reaction score
11
Location
Cape Cod
there are scale beetles and parasitoids (parasites don't kill their hosts, parasitoids do).
some sources include:
rinconvitova.com
greenmethods.com
ipmlabs

if you've used a pesticide recently, though, you have to check about any residual as the beneficials are very susceptible to the residues.
 
L

L I Jane

Guest
I had some soft scale on violaceas in the house & they just laughed at the alcohol wipebut then when I used the pyrethrin spray (Schultz Instant Houseplants & gardens)that did the trick.I did it at different intervals to take care of any 'babies'.The bigger guns are used in the greenhouse.
 

Attachments

J

Jmoney

Guest
enstar is very expensive but it kills scale and mealies, dead. and they don't come back for a long long time. it's some hormonal thing that, if I recall, causes the buggers to differentiate before they're ready. It's either that or painstaking alcohol wipes for my windowsill.
 

likespaphs

some call me brian
Joined
Jun 7, 2006
Messages
5,232
Reaction score
11
Location
Cape Cod
systemic pesticides are very good in that they are distributed throughout the plants, so any where that the bug bites, the bug is poisoned. contact pesticides require the pesticide or its residue touch the pest
 

likespaphs

some call me brian
Joined
Jun 7, 2006
Messages
5,232
Reaction score
11
Location
Cape Cod
you can also used a q-tip dipped in rubbing alcohol and rub off each scale. magnification helps...
 

bwester

Well-Known Member
Joined
Jun 7, 2006
Messages
1,238
Reaction score
0
I dont have the patience for the alcohol method. I'd much rather hose down my plants with a chemical pesticide. Have you used isotox before?
 

likespaphs

some call me brian
Joined
Jun 7, 2006
Messages
5,232
Reaction score
11
Location
Cape Cod
i've used orthene total release aerosols in a greenhouse while wearing the appropriate personal protective equipment, but have no other experience with it.
orthene stinks for about a week (maybe less) after it's use. if i remember correctly, a little bit of a rotten egg smell
 
2

Latest posts

Top