reevaluation of 1978 aerial Bacillus thuringiensis Berliner (Bt) applications for cankerworm control in Siberian elm shelterbelts
By: by John Hard.
Contributors: United States. Forest Service. Northern Region. State & Private Forestry.
Series: Forest insect & disease management; Report - Forest Service, Northern Region, Forest Insect and Disease Management -- no. 79-18.; Report (United States. Forest Service. Northern Region) -- no. 79-18.
Publisher: Forest Insect & Disease Management, USDA, Forest Service, Northern Region, State & Private Forestry
Published: 1979
Place of publication: Missoula, MT
Language: eng
Subjects: Canker-worms -- Control -- North Dakota -- Bismarck Area.; Siberian elm -- Diseases and pests -- Control -- North Dakota -- Bismarck Area.; Bacillus thuringiensis -- North Dakota -- Bismarck Area.
Description: "1. Defoliation by cankerworms in 1979 was significantly less in 1978 treated shelterbelts than in untreated shelterbelts. 2. Most shelterbelts treated in 1978 retained enough foliage by late June 1979 so that adjacent crops were protected from wind. 3. Aerially applied Bt at a rate of 1/2 lb./acre provided shelterbelt foliage protection for 2 seasons. 4. The 3 gallon/acre Bt formulation appears to provide more consistent foliage protection than the 1 gallon/acre formulation."--Conclusions.
Notes: Caption title.

Also issued online.