1900 J 



ENTOMOLOGICAL SOCIETY. 



73 



Badly infested trees should be cut down and burned, while those but slightly 

 infested should be sprayed with whitewash, or with a mixture of whale-oil soap and 

 carbolic acid. 



The San Jose Scale (Aspidiotus perniciosus). This pernicious scale is still with 

 us in abundance, and in spite of the treatment of last spring it is just as numerous as 

 it was last fall. Many new infestations have also been discovered, so that the whole 

 problem of treatment will have to be taken up anew, Mr, Fisher, Chief Inspector, 

 considers crude petroleum more effective than whale-oil soap in killing the scale, but 

 Prof. Webster, of Ohio, maintains that crude petroleum is too dangerous a remedy to put 

 in the hands of the ordinary fruitgrower, and accordingly prefers whale-oil soap. The 

 scale is here to stay and the sooner the orchardist recognizes this fact, and the need of 

 effective treatment to keep it in check the better will it be for the fruit industry of the 

 Province. A great industry is at stake. Can we afford to lose this great industry ? 



Garden Insects. 



The Bean Fly. (Aniho- 

 myia radicum)-In June many 

 complaints reached the office 

 regarding the attacks of grubs 

 on beans in Lambtoa Oounty. 

 One correspondent wrote that 

 hundreds of acres of beans 

 were being destroyed. Many 

 of the beans did not germinate 

 at all, due to the f ac t that the 

 maggot ate the interior of the 

 seed, and many of the stems 

 never developed leaves through 

 the destruction of the central 

 portion of the stem. Figure 

 33 shows very well the nature 

 of the work of the maggot 

 both in the seed and the stem. 

 The maggots are about one- 

 fifth inch long and yellowish- 

 white in color. They taper to 

 a point in front and broaden 

 out behind. After feeding for 

 a while the maggots descend 

 into the ground, and change 

 into barrel-shaped pupae. A 

 week or ten days later the 

 flies emerge from the pupa 

 cases and proceed to mate and 

 deposit eggs. After June no 

 further complaint was made, 

 although many growers had 

 replanted their fields. No 

 remedies could be suggested 

 beyond replanting as early as 

 possible, and not as deep as 

 usual. It is just probable 

 that the deep planting of the 

 seed beans wa? the direct cause 

 of the injury by the maggots, for the usual food of these creatures is decaying matter. 

 The beans began to show signs of decay, and the maggots took kindly to their new food- 

 aupply. 



^"^^ 



Fig. 33. 



-The Bean Fly- 

 (c) maggot ; 



- (a) adult flies ; (b) pupa case in ground 

 (d) an egg. (After Lugger). 



