- 3 - 



Table 2. Development of the ovaries of female apple maggots caught 

 on yellow traps versus red spheres, 1974. 



Sampling area 



% of females with undeveloped ovaries 



Bel chertown 

 She! burne Falls 



Yel 1 ow Traps 

 10 

 16 



Red Spheres 

 5 

 8 



Seasonal Cyc 

 nd se 

 and S 

 er 18 

 new t 

 place 

 ere a 

 trap 

 at Or 

 furt 

 son 

 ) and 

 re th 

 At N 

 week 

 appro 

 Augu 

 shou 

 Orch 

 rogra 

 s wit 

 ion t 



first a 

 ertown 

 Septemb 

 of the 

 were re 

 there w 

 off the 

 ducted 

 trends , 

 c m p a r i 

 borough 

 tance a 

 areas . 

 second 

 curred 

 week of 

 ted and 

 grams . 

 spray p 

 chusett 

 populat 



le. The 

 cond wee 

 he! burne 

 , may ha 

 raps tha 

 d had be 



number 

 s , parti 

 chard Hi 

 hermore, 

 f season 



that of 

 e differ 

 orthboro 

 of July, 

 ximately 

 St. Thi 

 Id be of 

 a r d i s t s 

 ms on ap 

 hout tak 

 rends be 



appl e m 

 k of Aug 



Falls ( 

 ve been 

 t were s 

 en in th 

 of heavy 

 cul arly 

 11 was t 



only on 

 al cycle 



western 

 e n c e s in 

 ugh, the 



while i 



1 month 

 s marked 



some si 

 in w e s t e 

 pie magg 

 i n g into 

 tween th 



aggot 



ust a 



F i g u r 



the r 



et ou 



e ore 



rai n 



from 



00 sh 



e fly 



betw 



Mass 



the 



peak 



n wes 



late 



diff 



g n i f i 



rn Ma 



ot em 



acco 



e 2 a 



popu 

 t the 

 e 1). 

 esul t 

 t on 

 hard 

 s tha 

 the r 

 ort t 



was 

 een e 

 achus 

 popul 



occu 

 tern 

 r , be 

 erenc 

 cance 

 ssach 

 ergen 

 unt t 

 reas . 



1 atio 

 aban 

 The 

 of t 

 Septe 

 about 

 t was 

 ed sp 

 i nd 

 caugh 

 aster 

 etts . 

 a t i n 

 rred 

 Massa 

 tween 

 e was 



for 

 usett 

 ce da 

 he po 



n pea 

 doned 



seco 

 he gr 

 mber 



4 we 

 hed s 

 heres 

 i c a t e 

 t. F 

 n Mas 

 Of 



peak 

 betwe 

 chuse 



the 



much 

 appl e 

 s sho 

 ta fr 

 s s i b 1 



ked be 

 orcha 

 nd pea 

 eater 

 13. T 

 eks du 

 ome of 

 . The 

 any 1 

 i g u r e 

 sachus 

 p a r t i c 

 s betw 

 en the 

 tts, t 

 first 

 1 arge 

 maggo 

 uldn't 

 om eas 

 e diff 



tween th 

 rds in B 

 k, aroun 

 eff ecti V 

 he traps 

 ring w h i 



the mat 



survey 

 ong-term 

 2 shows 

 etts (No 

 u 1 a r imp 

 een thes 



first a 

 he peak 

 and seco 

 r than e 

 t spray 



base th 

 tern Mas 

 erences 



e 



el ch- 

 d 



eness 

 that 

 ch 



e r i a 1 

 con- 



the 

 rth- 

 or- 

 e 2 

 nd 

 oc- 

 nd 



xpec- 

 pro- 

 ei r 

 sa- 

 in 



Many more apple maggots were captured at Northborough than in our 

 study (Figure 2). This difference might be attributed to a larger 

 population of apple maggots as influenced by apple variety at the 

 Northborough orchard. Also, vial traps may be more efficient than 

 the yellow or red sphere traps. This shows the importance of using 

 standardized traps when attempting to make comparisons of trap data 

 between various orchards and regions. 



