.348 



Bulletin 264. 



well inoculated. In the test plots described later in this bulletin the 

 inoculation produced no noticeable results. 



(2) Diseases. — The clover Anthracnose is a fungous disease which 

 attacks the growing plants usually during the first dry hot weather in 

 summer, or during the ripening of the seed. The disease results in the 

 rapid wilting of the leaves and smaller branches. Fields where clover 

 is thus affected should not be seeded to clover again for several years. 

 Alsike clover does not seem to be affected so readily as red clover ^ 

 Failures due to this disease are reported from Tennessee, southern Ohio* 

 and adjoining states, but no such failures have yet been observed in 

 New York. 



(3) Insect enemies. — The root borer is present throughout the State, 

 but does not injure the plants until the summer of the second year. 

 The eggs are laid in May and June in the one-year-old and older plants. 

 They are not laid in new seedings. If other conditions are favorable, 

 the first cutting of clover is all right. The borer may prevent a second 

 cutting. Such failures after one good crop are common. But if the 

 clover fails to produce the first crop the root borer is not the cause. 



Fig. 59.— Larua or grub 

 stage of the root borer. p^^^ to.— Pupa stage of 



root borer. 



Fig. 58' — Mature root borer 

 Natural size at right. 



(Figs, 58-60, from Circ. 67, U. S. Dept. Agr.) 



The fully developed insect is a small, dark brown, hard-bodied beetle 

 (Fig. 58). The larva, or grub (Fig. 59), is about an eighth of an inch 

 long, dingy white, with honey-yellow head. The pupa (Fig. 60) is even 

 smaller than the larva, also dingy white. There is one generation annu- 

 ally. The insects winter in the adult stage and do not abandon the 

 roots until about May, when they come out and begin laying their 



» Jour. Mycol. 12 No. 85, pp. 192-3. Science N. S. 22 (1905) No. 564, p. 503- 

 'Ohio, Bulletin 196, p. xx. 



