Chuck
Moderator
- Joined
- Feb 2, 2014
- Messages
- 11,653
- Reaction score
- 5,738
- Location
- La Porte Texas
- Hardiness Zone
- 8b
- Country
DE acts as an abrasive and literally cuts its way thru a hard bodied insects exoskeleton, usually on the leg joints and they "bleed " to death, that's why I don't think it does much to soft bodied larvae. Beneficial nematodes have been greatly used here in Texas for at least 10 years with outstanding success. Most people when they here the word nematode can only relate to the root knot nematode. It is very possible that your nursury has never of them.I will go down and check it out next weekend, but they never mentioned that when I was down there looking for the DE.
To my understanding, the DE, which has to be put in dry earth, doesn't effect the japanese beetles in the larvae stage but as the turn into the adult beetles. I think I am going to have to dust the DE on the plants if the ground doesn't dry up soon.