Crown borer larvae are dirty white larvae with brown heads. They are big at this time of year, but hidden deep in the crown. Phytophthora root rot will show up when you scrape the outer surface of crown tissue away, diseased areas will show up as reddish-orange instead of creamy white. If the problem is white grubs, you will find large c-shaped larvae in and around the soil. If none of these are a problem, sample soil for nematode numbers.
Nematodes can take a raspberry planting down over time, especially on sandy soil.
The threshold is 1000 root lesion nematodes per kg of soil. Elliot are in full bloom in the early areas. The second application of nitrogen should be applied at petal fall on blueberries. Bravo should be applied at petal fall . Do not apply Bravo to green fruits because it has caused injury in the past.