131 



ploughed in the autumn and potatoes planted the following year. 

 By the next year strawberries may again be grown. Not more than 

 two consecutive crops of strawberries should be taken from a field. 

 Although the danger of using clover has been explained above, nothing 

 will quite take its place, unless it can be shown that it is equally 

 profitable to grow peas or vetches, or some other legume, and still 

 maintain the fertility of the soil. 



These oviposition records emphasise the necessity of destroying as 

 many adults as possible. Poultry will be found of great benefit in 

 this respect. They should be shut up during blossoming time, and 

 allowed to run again after the crop is off. To overcome the difficulty 

 of new plantations being reinfested by adjacent old ones, trials are 

 being made with wooden barriers fitted with a band of tanglefoot. 



Ross (W. A.) & CuRRAx (C. H.). The Strawberry Weevil.— 5^ 

 Ann. Kept. Ent. Soc. Ontario, 1919, Toronto, 1920, pp. 88-95, 

 4 figs. [Received 8th January 1921.] 



The strawberr}^ weevil [Anthonomus signatus. Say] sometimes 

 destroys as many as 75 per cent, of the bads in strawberry fields in 

 Ontario, all the staminate varieties being liable to attack. The 

 adults appear in Ma}', and oviposit, at first on strawberry and later 

 on raspberry and blackberry, from mid-May until late June. The 

 egg is laid within the bud, usually among the stamens, and after 

 ovipositing the weevil crawls down the stem and cuts it, so that 

 the bud either falls immediately or is left hanging by a thread. The 

 larva feeds at first on the pollen and the interior of the bud, and 

 eventually bores its way into the receptacle, forming within it a closed 

 cell, the entrance being plugged with excreta. The average larval 

 period is 13 days ; pupation occurs within the bud and lasts about 

 10 days. The adults emerge from the buds during late June and 

 July, and feed freely upon the strawberry leaves and various other 

 plants and weeds. They go into hibernation at midsummer, choosing 

 vegetation and rubbish in adjoining waste lands, under which they 

 shelter, or about the leaves of strawberry plants. Lead arsenate 

 and sulphur repellents that have been known to succeed [R.A.E., 

 A, iv, 189 ; vii, 256] were used with good results, only 5 per cent, 

 of the buds being destroyed when the above substances were used 

 as a dust in the proportion 20 : 100 or 10 : 90. 



Ross (W. A.) & Caesar (L.). Insects of the Season in Ontario. — 50th 

 Ann. Rept. Ent. Soc. Ontario, 1919, Toronto, 1920, pp. 95-104, 

 10 figs. [Received 8th January 1921.] 



Injurious insects of 1919, in addition to those already mentioned 

 [R. /!.£., A, ix, 124,129], include Cydia pomonella (codling moth), which, 

 however, did little damage in well-sprayed orchards ; Coleophora 

 fletcherella (cigar case-bearer) ; Eucosma ocellana (bud moth) ; Erio- 

 phyes pyri (pear-leaf blister mite) ; Campylomma verbasci (mullein 

 leaf bug), which was found attacking a large percentage of apples 

 and causing scarring and deformation ; Aspidiotiis perniciosus (San 

 Jose scale), which is gradually increasing again in neglected orchards ; 

 Ancylis nuhecidana (apple leaf sewer) ; Enarrnonia prunivora (lesser 

 apple worm) ; Eriocampoides limacina (pear slug), the first generation 



(1912) l2 



