. Diseases of fruit and nut crops in the United States in 1921. Fruit Diseases and pests United States; Nuts Diseases and pests United States. APPL2; - Bitter rot 27 disease, but the collaborators in the remaining bitter rot states report an average nr a greater amount th&n last year. It should be remembered that it vvas in this bitter rot belt that the crop v/as very greatly damaged and even ruined in many cases by the spring freezes. Consequently, the yield of apples was very low and there was a general lack of interest in the crop. The freezing damage caused a general cessation of spray
. Diseases of fruit and nut crops in the United States in 1921. Fruit Diseases and pests United States; Nuts Diseases and pests United States. APPL2; - Bitter rot 27 disease, but the collaborators in the remaining bitter rot states report an average nr a greater amount th&n last year. It should be remembered that it vvas in this bitter rot belt that the crop v/as very greatly damaged and even ruined in many cases by the spring freezes. Consequently, the yield of apples was very low and there was a general lack of interest in the crop. The freezing damage caused a general cessation of spraying with the result that m some cases bitter rot had a ojiance to develop v/ithout hindrance on the small amount of fruit that set- Tkus we have two important factors aside from the weather affecting the im- portance of bitter rot in 1921;,(l) a very small crop to be affected, and (2) lack of spraying which permitted abundant infection on the unsprayed fruit. The accompanying map shov/s th. estimated percentage of loss from bitter rot in the United States during 1921- (Fig* 5).. Fig. ^j. Percentage loss from bitter rot,. I92I. S'^arcity of fruit in the southern apole belt resulted in the market- ing of much fruit affected with bitter rot and other disi^ases- Relation of weather to bitter rot in 1^21 Collaborators in South Carolina, Georgia, Mississippi, and Illinois report that bitter rot did its greatest damage at the time when the fruit was approaching maturity, which was in August and September, Therefore, the weather of these two months should be considered in staW-ying weather The month of July was considered unusually warm throughout the country and the temperature was above normal in practically all of th^. bitter rot states. The rainfall, however, was deficient in these states ^.ith the ex- ception of South Carolina and Georgia. Here rainfall was abundant, averag- ing about 7 inches in the two states. Further northward and westward the rainfall became lighte
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Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1920, bookyear1922
