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By Jack R. Plimmer

content material: Chlorinated pesticides : retrospect and prospect / G.T. Brooks --
The development of resistance mechanisms constructed opposed to pesticides / A.W.A. Brown --
improvement of the yankee herbicide / E.F. Adler, W.L. Wright, and G.C. Klingman --
Mode of motion of herbicides / Donald E. Moreland --
The s-triazine herbicides / Enrico Knuesli --
The environmental chemistry of herbicides / Donald G. Crosby --
Fungicides : earlier, current, and destiny / James G. Horsfall --
Metallo-organic fungicides / G.J.M. Van Der Kerk --
The sulfenimide fungicides / Gustave ok. Kohn --
the advance of agricultural antibiotics / Tomomasa Misato --
views of hormonal keep watch over of insect improvement / J.B. Siddall --
Insect pheromones / Murray S. Blum --
Benzoylphenyl ureas : a brand new staff of larvicides interfering with chitin deposition / A. Verloop and C.D. Ferrell --
Fourth new release pesticides / W.S. Bowers --
put up harvest responses and plant progress regulators / Morris Lieberman --
development regulators in flowering and fruit improvement / L.C. Luckwill.

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Cal. Trinidad Ariz. House F l y Sheep B l o w f l y Body L o u s e Bed Bug German Roach Blue T i c k Cattle Tick Salt-marsh Mosquitoes I-W § Enc. M o s q u i t o e s M a l a r i a Mosquito 1949-58. Sardinia NSW Japan Italy Tex. S. A f r i c a Queensl d Fla. Cal. Nigeria 1 i n d u s t r y n o t a b l y s u f f e r e d from the f a i l u r e o f l i n d a n e and d i e l d r i n t o c o n t r o l t h e sheep b l o w f l y a n d t h e c a t t l e t i c k . The u s e o f a l d r i n a g a i n s t w i r e w o r m s , r o o t w o r m s and r o o t maggots i n t h e s o i l was s o o n r e w a r d e d b y c y c l o d i e n e - r e s i s t a n c e i n 3 w i r e w o r m s p e c i e s , 4 s p e c i e s o f Diabrotica rootworms i n c o r n f i e l d s , and 6 s p e c i e s o f Eylemya r o o t maggots o n o n i o n s , B r a s s i c a s a n d o t h e r v e g e t a b l e c r o p s ( T a b l e I V ) .

S . ' s , a n d 325 B . S . ' s . S u p p o r t i n g t h e s e s c i e n t i s t s w e r e 495 o t h e r people s e r v i n g p r i m a r i l y as t e c h n i c i a n s . The n u m b e r s have c o n t i n u e d t o i n c r e a s e u n t i l i n 1975, t h e r e were 451 P h . D . ' s , 247 M a s t e r s , 404 B a c h e l o r s , w i t h 877 i n t h e " o t h e r " c a t e g o r y , f o r a t o t a l o f n e a r l y 2,000 people working i n industry h e r b i c i d e research i n the United States.

But i n s o u t h e r n T e x a s , Mexico, N i c a r a g u a a n d P e r u t h e m u l t i p l e r e s i s t a n c e s o f t h e t o b a c c o budworm, and t o a l e s s e x t r e m e d e g r e e o f H. zea a n d Spodoptera sunia, h a v e made e v e n 20 i n s e c t i c i d e a p p l i c a t i o n s a s e a s o n q u i t e w o r t h l e s s , and i n d e e d t h e r e i s l e s s damage t o t h e c o t t o n i f no c h e m i c a l s a r e a p p l i e d a t a l l . The o n l y m a t e r i a l s t h a t c a n be r e l i e d u p o n t o k i l l t h e s e m u l t i r e s i s t a n t H.

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