11) 



apt to 1)0 coiirusfd with root knot. In clul)-r<)()t, how- 

 ever, the roots swell into lari^cr fingcr-liko masses or 

 "chihs". The (Usease is worst in acid or poorly drain- 

 ed soils. The hesl remedy is slaked lime, apj)lied sev- 

 eral weeks before planting at the rate of fifty to sevin- 

 ty-five bushels per acre every few years. Rotation of 

 crops is also im|)ortant. Avoid plants from soils in- 

 fested with the disease. 



Black Rot is a serious bacterial disease, in which th(^ 

 cabbage plant becomes dwarfed or one-sided in 

 grow th. A cross-section of the stem of diseased plants 

 will show a dark brown or black ring in tlu' stem just 

 beneath the bark. In severe cases this blackening can 

 usually be traced upward into the cabbage head. In 

 extreme cases, the plant may die. Plants of all ages 

 are attacked. There is no certain method of controll- 

 ing the disease, but a knowledge of the following facts 

 may enable the grower to prevent it or to hold it j)art- 

 ly in check. The disease may be carried by infected 

 seed, bv insects, bv live stock, or by running water. 

 It might be spread over a large area by throwing a 

 diseased plant on the manure heap instead of burning 

 it. 



Wilt ("Yellows'"), which is very common on cab- 

 bage in this state, does not affect any other croj). It 

 is lirst seen in the lower outer leaves. The whole leaf 

 may turn yellow at the margin or between the veins, 

 later turn brown as if scorched by fire, and finally 

 drop oH". Someti;nes only half of the leaf is affected 

 while the other half remains green. This is the more 

 usual characteristic of the disease. The lowest leaf 

 is the first to drop off, and is followed by those above in 

 ra])id succession until the bare stock remains. Crop 

 rotation should be practiced, to extend over a period of 

 5 to 8 years. 



"D(iinj)in(f-(>/f" attacks young seedlings. Under cer- 

 tain conditions damage is often rapid and extensive. 

 It is caused by two or more species of fungi, the spores 

 of which occur in many old garden soils. In the seed- 

 bed where plants are crowded, the soil kept too moist, 

 or the humidity kept too high, with poor circulalion 

 of air and insulVicient light it is most apt to appear. 

 The young seedlings are attacked at the surface of the 

 soil, the stems arc soon girdled and the plants fall over 



