Oriented Movement of the Boll Weevil in Response to Trap Crop Plantings, Foliage Color and Sex Pheromone.

O b je c tiv e s o f t h i s re s e a rc h were to o b ta in e c o lo g ic a l d a ta ab o u t th e b o l l w e e v il, Anthonomus g ra n d is Boheman, r e l a t i v e to d i s p e r s a l o f o v erw in te red p o p u la tio n s in re sp o n se to s e le c te d s t im u l i and to u t i l i z e th e se d a ta in c o n tro l program s. A th re e -y e a r s tu d y o f th e b o l l w eev il d is p e r s in g from h ib e r ­ n a t io n s i t e s was made in n o r th e a s t L o u is ia n a . Data from th e se s tu d ie s in d ic a te d th a t b o l l w e ev ils tend to co n g reg a te in a re a s o f o ld e r , more m ature c o tto n upon em erging from w in te r q u a r te r s , e s p e c ia l ly i f such a re a s a re lo c a te d a d ja c e n t to h ib e rn a t io n s i t e s . O verw in tered b o l l w eev ils c o n c e n tra te d in e a r ly p la n te d b o rd e r rows o f c o tto n i f th e d i f f e r e n t i a l in p la n t in g d a te s was s u f f i c i e n t to g iv e a d i s t i n c t d if f e r e n c e in s iz e o f p l a n t s . I n s e c t i c id e s a p p lie d to a re a s where b o l l w eev ils were congregated caused a r e t a r d a t io n in b u ild u p o f p o p u la tio n s in a d ja c e n t a r e a s , th e reb y d e la y in g th e d a te a t which o v e r a l l i n s e c t i c id e tre a tm e n t had to be i n i t i a t e d . S tu d ie s conducted d u rin g 1965 and 1966 showed th a t the b o l l w eev il e x h ib ite d a d i s t i n c t n o n p re fe ren ce fo r c o t to n p o s se s s in g g e n e tic c h a ra c te r s fo r red f o l ia g e . Where f i e ld s o f c o tto n pos­ s e s s in g re d f o l ia g e were b o rd e red by narrow s tjr ip s o f c o tto n