Root Knot Nematodes. If your tomato plants are stunted, their roots have knots (galls) and the foliage is pale yellow, they are most likely infested with root knot nematodes. The galls caused by the nematodes keep the roots from sending nutrients up to the foliage, which causes the stunting and yellowing.
The time when fall starts is between summer and winter. As with the other seasons, its commencement differs and is based on the hemisphere you are in. Commencement Dates. In astronomical terms the season begins on September 22 up to November 22 in the Northern Hemisphere.
For the Northern Hemisphere, the fall equinox is the moment when summer ends and fall (autumn) begins, while for the Southern Hemisphere it is the moment when winter ends and spring begins. In the Northern Hemisphere the fall equinox occurs every year on September 22 or 23. Very occasionally it can also fall on September 21 or 24. The dates given on this page are based on Coordinated Universal Time (UTC), which for practical purposes is equivalent to Greenwich Mean Time (GMT).