The few days required to induce Zea diploperennis to flower
In late April of 1994 65 Zea diploperennis plants, P.I. No. 441931,
were planted in isolation in St. Paul, Minnesota. Sixty-three were induced
to flower by covering them with 30 gallon galvanized trash barrels from
7:00 pm until 7:30 am for a variable number of nights. Again in 1995 volunteer
plants from the shattered seeds were exposed to short days for various
numbers of days. The volunteer plants from this 250 square meter plot exceeded
|No. of plants||No. of long nights to produce silking||No. of days to flower||No. of silking locations|
|1||5||55 days-tassel only||none|
|1||7||41 days-tassel only||none|
Constant observations plus data would suggest tropical maize, at least Zea diploperennis, can be induced to flower by covering with barrels for only 11, 12, or 13 days.
In a separate experiment 23 plants were identified at time of first
silkings. Days to shattering of seed from the ear were recorded. Shattering
was assumed when the top one or two seeds would disarticulate with a soft
bending of the seed from the ear. Experience indicated it only takes one
or two days from a ripe color until disarticulation takes place.
|No. of plants||Days to disarticulation||No. of seeds collected|
The seed of Zea diploperennis in Minnesota reached physiological maturity in 27 days during the weather conditions of August 1995.
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