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.
The meteorological seasons in the Southern Hemisphere are also opposite to those in the Northern Hemisphere: Fall (autumn) - starts March 1 and ends May 31; Winter - starts June 1 and ends August 31; Spring - starts September 1 and ends November 30; and, Summer - starts December 1 and ends February 28 (February 29 in a Leap Year).