The proper way to produce feminized seed is to vet a solid stable Female. Tested under several conditions and very tough to stress enough to hermie. Take that female and force it to hermie (ussually chemically).
Put that forced female in with mature blooming clones of the unforced female. After...
Hermie seeds from a hermie mother produce up too 70% hermie plants 30% female seed. Seeds from a stable but forced female to male are standard feminized seeds. Still a higher risk of hermaphrodism but through proper testing and breeding can be good. Never mess with seeds pulled from the plant...
I havent used it. Probably neem. I dont use anything with neem, alcohol, yeast, citric acid or any chemicals.
I use Mite Death and Foliar for prevention, erradication and recovery. Highly concentrated.
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Yes it is totally possible. Even under 24hrs of light like my plants. When mature and ready to put into flower they will show . Generally at the 6th node of true leaves.
Male
Female
Interesting. Like you said resembles nitrogen toxicity but the leaves are pale. Still appears to be root issue from what you described above. Check for root aphids. Bottom of tray or pull from pot and inspect root ball before watering next.
Leaves will naturally yellow from bottom up during bloom with little nitrogen. I dont cut out nitrogen completly during bloom until the third or 4th week. Your plant looks good but is a bit pale for the third week. If you have a 7 week strain there it wont hurt to feed a little nitrogen for a...