I feel you on the hoppers...i am still doing walk through s to grab and smash them 2x a day. But i am noticing a trend. The leaves that have the white residue from the diatomaceous earth are not getting eaten.
Diatoms are just fossilized Silica. They are INSOLUBLE in water. They work better as a powder that can attach to bugs, but what if a thin layer spread by spraying is enough to hold them back? Isn't it true that they can't digest it w.o it tearing apart their insides? It might be that my grasshopper fight had an unseen ally that is helping slow them. I think they can't eat the DE and it is almost coating my plants. Just another guess though.
PLEASE, tell me if you think i am right...i am guessing here.
I have no idea but I'm willing to give it a try. I sprayed the plants last night with a strongest to date mix of the garlic and chili extract and this morning there were just as many of the damn grasshoppers all over the plants. I too do the twice a day de-hopper routine by strongly flicking them off, pinching the smaller ones, or sneaking up on the big ones and grabbing their legs then quickly throwing them down to the ground hard. That is enough to stun them so I can stomp them quick before they have a chance to recover and hop away. They are getting bigger and chomping off whole branches as well as scalping off the bark on whole lengths of branches. It's fucking crazy what they are doing.
I will incorporate the DE into my neem/garlic extract sprays and see if that doesn't do anything for them. I'm sure with the oils that the DE would have a better chance of sticking to the plants as well and hopefully staying on there longer? I'll have to try it out, hell I'll try anything out these fuckers are so bad. ;_;