Help, Green leafs and branches are falling off my plants

Hi

I've been growing for years and have never had this problem before. I walked in my room 2 weeks ago I'm in 2nd week flower and there was a pile of green leaves and branches around the base of some of my plants. I few days letter the plant was snapped at the base.

I don't understand why or what's going on, they all look great and healthy, it's like someone cut off all the leaves and branches .

I looked for bugs but can't see any at all, I think my PH was to low I'm not sure.

The room is totally wiped out now.

I now have my new clones in the are only 8 inches tall, I went in yesterday and they are broken at the base and laying dead on the side, they also look Heath and green.

I'm really need help as I don't know what's going on.

My PH: is good
I hand feed in coco
I use pycho nutrients.

I'm in trouble, any ideas people,
I'm in Sydney Australia

Regards

Dazman

any pics??

What Dai said, also does anyone else have access to the plants? B/c that (they are broken at the base and laying dead on the side, they also look Heath and green.) doesn't add up.

u could possibly have a cattipila in ur plant aounda nuts but u do hear of it just need a few pics..

ive got a little problem of my own ive got a plant in garden in a 20 gallon container nutrients are all correct ph is normal only problem is its flowering im july but the other 2have no flowers/hairs ect.. same strains any ideas