. Westliche Landwirtschaft. Ameisen whichbecome durch die schleimpilze Organismus krank sind Kohl, Blumenkohl, Rosenkohl, Kohlrabi, Steckrüben, Rettich und bestimmten Senfe. Es scheint die informationas relativesusceptibility ofdifferent varietiesof thisdisease crucifers zu schmälern. Symptome. Keimling plantsshow eine decidedwilting oder nachlassender. Sie sind stuntedand haben eine un-gesund erscheinen. Die meisten Samen-lings angegriffen Sterben. Wenn ältere plantsare angegriffen, das erste Zeichen ist ein ofdisease decid-ed Welke währenddes Hitze der Nachricht, die während der Nacht, wenn die Transpiration isless Rap überwunden wird,

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. Western agriculture. ants whichbecome diseased by the slime mold organism are cabbages, cauliflowers, Brussels sprouts, turnips, rutabagas, radishes and certain mustards.There seems to belittle informationas to the relativesusceptibility ofdifferent varietiesof crucifers to thisdisease. Symptoms.Seedling plantsshow a decidedwilting or flagging.They are stuntedand have an un-healthy appear-ance. Most seed-lings attacked die.When older plantsare attacked, thefirst indication ofdisease is a decid-ed wilting duringthe heat of theday which is overcome during the night when transpiration isless rapid. This condition is brought about by the organ-ism which has invaded the root tissue and caused excessiveand abnormal growth in the phloem and cortex regions atthe expense of the xylem region, which is the water conduct-ing tissue of the plant. The clubbing of the roots is verycharacteristic. The roots are greatly enlarged at the basewhile toward the tip they appear normal. Curious malfor-mations are likely to occur, . Figure 104.— Clubroot od cabbage. Losses from thisdisease have often been disastrous. 272 WESTERN AGRICULTURE Control. The disease cannot be cured; so, the only courseof action must be prevention. The following rules areapplicable: 1. Avoid all those conditions which favor disease, suchas lack of clean cultivation, manuring before planting, andpoorly drained lands. 2. Where cabbage is fed to animals it should be cookedbeforehand to destroy the organism or otherwise the sporeswill pass through the alimentary tract uninjured. 3. Deep plowing should constantly be the rule. 4. Since the organism preys upon various crucifers, rotate crops. In the rotation, crops not of the cruciferouskind should be used. 5. Clean soil should always be in the seed bed. Toobtain this always sterilize with steam or with formalin. 6. When soils are acid, liming should be practiced. Use75 bushels of air-slacked stone lime per acre. BACTERIAL DISEASES The two most disastrous bac-terial di

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• bookcentury1900
• bookdecade1910
• booksubjectagriculture
• bookyear