White droplets are common on new planting the plants grow so fast they pickup iron slowly farther south more plants grow into larger bush. Iron heavy so gravity pull is greater. In large planting go to fertlizer house are dealer buy liquid iron in 5 gallon pail last that I bought was 27.50 for 5 gallons so I got 4 cans for 22 acres blackberries that came close to 4 quarts per acre. Method of application is to spray straight stream a long side plants on eachside in november are december of year. This take care of iron problems for many years 3 at least in sandy soil longer in other soils. You haveto live through this season with white druplets to late do anything should see the christmas tree effect in some leafs which is iron problems vains be green and leaf be yellow. Its funny to me a stink bug can not suck just iron from druplet. Iron pigment of color. By watching a stink bug feed on berry you see what goes on the juice be suckout druplet so skin will swivel and turn brown like sunburn not turn white filled with juice. If grab pail liquid iron take around barn it come clear how heavy it is and plant has time with uptake. A trap crop of turnups and mustard in early fall planted when soybeans turn yellow leafs they come to most green around which be greens spray with pounce chemical time limit to harvest is one day it kill all stink bug around your farm wait till all come in once frost falls there gone if don't kill them greens good to. I started cultivating blackberries in 1949 in south have not have white druplet problem in many years put iron on about every 5 years. If study blackberry culture you see iron is need as fertilizer added in program in someplaces but it is best on new planting to prevent. Note to small growers a good garden center have 8 .oz bottle of liquid iron use it all at teaspoon per gallon water for blackberries and other plants on soil. Larger berry variety will have more white druplets.

Stinkbugs (shieldbugs) can also cause the symptoms mentioned above, especially the "burst", or weeping drupelets. It can be confusing, because sunscald will turn black drupelets purple and red drupelets white. The scalded berries should all be damaged at the same angle. Stinkbug damaged drupelets will have a puncture mark and oozing juice along with the pale color. Mites can also cause uneven drupelet color.

More likely the stinkbugs (or shieldbugs). The stinkbugs here lay eggs in oriented clusters just like the ones in your image. These eggs will likely produce tiny, rounded bug nymphs.

I love these gnats. Idk. They’re my favorite For some reason. At https://proudpests.com we have only dealt with them 1 time though. They don’t seem too common in Las Vegas.