APPLE INSECTS 



19 



pest to control by si)rayinj>; witli an arsenical poison. In 

 the South and ])()rtions of tlu^ West, however, where two 

 or more full generations develo]), sprayinj*; has in <>;eneral 

 «;iven less satisfactory results. In sprayin<>,- for this insect 

 a<lvantaj!,"e is taken of the fact that the J2;reat majority of 

 the youn<;' larvae enter the api)le at the blossom end. For 

 about two weeks after the |)etals fall the calyx lob<'s are si)rea(l 

 wide ai)ai"t and the youn<>; apple stands upri«;ht on the stem 



Fit;. 17. — Two later stages, the calyx lo])es closed ; it is now too late to si)ray 



ei'fectively. 



with the calyx end directed ui)ward (Fig. !())• If at this time 

 an arsenical spray is thoroughly aj^plied with sufficient force 

 to drive the poison into the calyx cu]), minute i)articles of the 

 poison will be deposited where the young larva will get it in 

 his first meal as it centers the fruit. In about two weeks the 

 calyx lol)es close as shown in Figure 17, and it is then too late 

 to spray effectively, for it is then impossii)le to place th(^ poison 

 where it will do the most good. The closed calyx lobes form 



