DEPARTMENT OF AGRICULTURE. 



this pest is from about the end of April to the end of May, about eleven months of 

 the year being spent in the ground. Prunes and cherries are also subject to severe 

 injui 



hniiortnnt. The control of this pest at present, in the infected area, is being 

 directed by the Government. Where the presence of the pear-thrips is suspected, 

 growers are particularly requested to send in material for identification. Enclose 

 blossom-clusters and leaves-with the suspected thrips on them in a tight tin or wooden 

 box, and mail to the office of the Plant Pathologist and Entomologist, Court-house, 

 Veruon, B.C. 



THE CHERRY AXD PEAR SLUG (Eriocampoidcs limaciitd). 



This insect is a common pest of pear, cherry, plum, and other fruit-trees. 

 Although not difficult to control, it is frequently permitted to cause considerable 

 injury. The larvae are of a yellowish-white colour when they emerge from the eggs. 



but rapidly acquire a coat of dark- 

 green slime (an exudate of the body), 

 which gives them the appearance of 

 slugs, in which state they are well 

 known to fruit-growers. The adult is 

 a four-winged insect which belongs to 

 a group known as sawflies. There are 

 two broods annually. Although the 

 larvae, or slugs, may be found during 

 the whole of the season, from the end 

 of May to the end of September or 

 early October, they are most abun- 

 dant during the latter part of May and 

 again during late August and Sep- 

 tember. 



Control. Forty-per-cent. nicotine sul- 

 phate, 1 part to 1,000 parts of water, 

 plus 5 Ib. of whale-oil soap to each 

 100 gallons of solution. If no aphides 

 are present on the trees the soap may 

 be omitted, in which case increase the 

 strength of nicotine solution to 1 



part to 800 parts of water. Arsenate of lead, 1 Ib. to 40 gallons of water, may 

 also be used, but this does not kill the larvae so quickly, and if weather con- 

 ditions are favourable may burn the foliage of the cherry to some extent. White 

 hellebore, 1 Ib. to 40 gallons of water, is also very effective and is cheaper than the 

 nicotine sulphate. To get good results from this spray the hellebore must be fresh 

 and unadulterated. An application of one of the above formulae should be given as 

 soon as the larvae appear numerous. In the home garden, where perhaps only one 

 or two trees are affected, dusting them with air-slaked lime, or fresh pyrethrum, 

 1 part mixed with 8 to 10 parts of cheap flour or air-slaked lime, is advised. 



THE PEACH-ROOT BOREB (Sanninoidea opalcscens, S. exitiosa). 



This is a troublesome pest and is making considerable headway in the peach dis- 

 tricts of the Okanagan Valley. Considerable loss is being caused through its injuries. 

 Peaches are most susceptible to attack, but prunes, cherries, apricots, apples, and 

 plums are also attacked. The adults emerge during the early part of July, soon after 

 which the females commence depositing their eggs. The egg stage lasts about two 

 weeks, and as soon as the young larvae hatch they bore into the bark just below the 

 surface of the ground, and feed on the sap-wood of the trees. Complete girdling of 

 the trees results and death often ensues. 



Fig. 17. Cherry and pear slug, (a) Adult 

 female; (6) larva with slime removed; (c) same 

 in normal state; (*/) leaves with larva?, show- 

 ing injury. <i, (5), (c) enlarged; (d) slightly 

 reduced. (After Marlatt.) ' 



