. The insect and other allied pests of orchard, bush and hothouse fruits and their prevention and treatment . Insect pests; Fruit. Insects, etc., Injnrions to tJie Pear. 355 lj[|-E-lllSTn|;V AXIi HaIIITS. Th liu small mites winter uiuler the bud scales, and as soon as the leaves open they enter tJiem through the stomata. The)- winter preferaljly ruider the second and third layers of ].)ud scales" often m colonies of as many as fifty. In spring they are seen in nundiers first towards the liase of the growing bnd scale and here they seem to moult. At first they produce a small red pustule,
. The insect and other allied pests of orchard, bush and hothouse fruits and their prevention and treatment . Insect pests; Fruit. Insects, etc., Injnrions to tJie Pear. 355 lj[|-E-lllSTn|;V AXIi HaIIITS. Th liu small mites winter uiuler the bud scales, and as soon as the leaves open they enter tJiem through the stomata. The)- winter preferaljly ruider the second and third layers of ].)ud scales" often m colonies of as many as fifty. In spring they are seen in nundiers first towards the liase of the growing bnd scale and here they seem to moult. At first they produce a small red pustule, no bigger than a pin point, by the end of a week it may reach the size of a pin's head. Each gall contaiirs but a single female, and she deposits a few eggs, from fiye to six, as far as oliserved, and these at an inter\'al of several days. As the leaves unfold, the mites which breed in the galls crawl out and enter fresh stomata on the same or other lea\-es, and so tlie disease spreads. They keep on migi'ating throu^'li June, duly and August, and even into Sep- temlier. As the galls grow older tliey change in colour, eventually getting to blaclv spots of dead tissue. As the leaves mature off the mites nugrate to the forming buds and there they enter be- tween the outer scales. Tlie terminal buds seem to harbour the most. In May and June, if there has been very rapid increase, the mites may lie found upon the pubescence of the 3'oung wood and on tlie leaf petioles. In autumn they leave the foliage and may be fViund moving on the trees and entering the buds. The mite is very like the Big l!ud Mite of the currant. In America, the late Professor Liutner found that " under ordinary circumstances it spreads rapidly and proves rjuite injurious il' allowed to continue through the season and for successive years," Lounsbury (3) considers it a recent importation into the Cape, for only young and newly grafted trees have become infested. The effect of weather on this mite seems
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectpests, bookyear
