You are looking at 1 - 2 of 2 items for
- Author or Editor: Olcott-Reid Brenda x
Siberian C seedling rootstock delayed the bloom of 3 cultivars of peach (Prunus persica (L.) Batsch) as compared to seedling rootstocks Harrow Blood, Lovell, and Halford. Starting about 1 month before bloom, trees on Siberian C developed more slowly than those on other rootstocks as measured by flower bud moisture content. Bloom was delayed 5 days by Siberian C in both 1977 and 1978, with no adverse side effects.
Evaporative cooling, trickle, and no irrigation were compared under a reduced pesticide program and no pesticides for effects on pests of ‘Delicious’ apple (Malus domestica Borkh.) at 1 location in 1979 and at 2 locations in 1980. Evaporative cooling slightly increased foliar scab in one orchard and fruit scab at both locations on trees receiving no fungicides, but fungicides applied to one side of the trees overcame this effect. Irrigation treatments did not affect white rot incidence. Evaporative cooling lowered bitter rot incidence on non-sprayed trees in the year in which they were inoculated, apparently by washing off spores, but increased bitter rot on trees receiving fungicides in the following year when inoculum levels were much higher. Aphid colonies and damage from external fruit feeders and codling moth all increased under evaporative cooling when populations were high enough to detect differences between treatments, but this occurred during only one season at one location for each pest. Following either delayed dormant oil or selective miticide applications in June, evaporative cooling consistently maintained European red mites and usually maintained two-spotted spider mites below damaging levels, while pest mite populations on trickle- and non-irrigated trees resurged to high levels.