A small portable sprayer was found to be the most practical for applying experimental herbicides for the control of lambkill (Kalmia angustifolia L.) in lowbush blueberry plots. The standard knapsack sprayer requires a large volume of rinse water to clean the sprayer between treatments and this frequently has to be transported a considerable distance to the spray site. In order to reduce the amount of rinse water to a minimum a knapsack sprayer was modified so that the spray solution for each treatment could be held in an individual disposable polyethylene bag.

The principle of the variable dosage or logarithmic sprayer was described first in 1955. Since that time at least two sprayers utilizing this principle have appeared. Certain limitations were, however, encountered in adapting these sprayers for small plot testing under field conditions.

Although a number of physiological effects of amitrole (3–amino–1,2,4–triazole) on plants have been reported there appears to be nothing in the literature on its effect on germination and seedling development in cotton.

In a preliminary experiment young oat plants which grew in culture solution containing 0.05 ppmw of 2–chloro–4,6–bis (ethylamino)–s–triazine (simazine) for 60 hours were injured but not killed. The objective of the experiment reported here was to study the relations among (a) the concentration of simazine in the culture solution, (b) the concentration of simazine in the oat plant, and (c) the reduction in weight of plants following treatment.