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Home → Publications → Tree Planters' Notes → Tree Planters' Notes Volume 19, Number 3 (1968) → Bud Break of Douglas-Fir Seedlings not Delayed by Spring Treatment With TMTD or ALAR

Bud Break of Douglas-Fir Seedlings not Delayed by Spring Treatment With TMTD or ALAR

Chemically delaying vegetative bud break on nursery stock could be advantageous. A delay of a week or two might avoid late-spring frost damage to tender shoots or gain more favorable conditions for lifting seedlings. Delayed lifting in spring would also reduce the need for storage facilities. Delaying bud break until other vegetation had sprouted might reduce browsing by animals on shoots of newly planted seedlings. This was prompted by bud break appearing to be delayed in nursery beds of Douglas-fir seedlings treated with TMTD 2 rabbit repellent. However, direct comparisons with untreated seedlings of identical seed source were usually lacking. Since TMTD is combined with Rhoplex AC-33 3 adhesive, these chemicals were tested together and separately. Also included was a very limited trial of ALAR; a growthretardant chemical that delays fruit bloom of pears when applied the preceding fall (1).


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Author(s): Kenneth W. Krueger, Albert H. Tsuda

Publication: Tree Planters' Notes - Volume 19, Number 3 (1968)

Volume: 19

Number: 3