摘要
近年来河北省固安县梨黑星病发生日趋严重。全县每年由此病造成的经济损失达５００万元以上。重点发病区相屯村１９８９年和１９９０年造成直接经济损失分别达１２万元和２０万元。１９９１年在发病最重的地块和最易感病的京白梨品种上进行了该项试验研究。通过试验初步找到了该病的发病规律和防治措施。在芽萌动时喷布尿素等药剂有助于铲除越冬病源；盛花后一周为第一次药剂防治的关键时期；全年防治７～８次可有效地控制梨黑星病发生。试验区的病果率由１９９０年的１００％下降到１９９１年的１．８％，按传统方法防治的果园病果率仍无明显变化。
In recent years,the pear scab problem has become increasingly grave in theGu'an county,Hebei province.The County's annual financial loss caused by this diseaseamounts to more than 5 million yuan. The direct financial loss of Yangtun village,a key pro-ducing area, amounted to 120 thousand and 200 thousand yuan in the years 1989 and1990. We experimented and researched in the most incidental areas and on the most vulnera-ble breed,the Beijing white pear,in 1991.Through the experiments, we found preliminarypatterns,methods of preventing and curing the disease. During germination, carbamide andother pharmaceutical sprays help to uproot the overwintering pathogeny. One week afterblooming is the critical period of first time pharmaceutical prevention and curing;7～8 timeseach year can effective control the incidence of pear scab. The rate of affected fruits in theexperimental area droped from 100%in 1990 to 1.8%in 1991.The rate of affected fruits ingardens treated with conventional methods showed no obvious improvement.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
1994年第2期94-98,共5页
Journal of Beijing Forestry University
关键词
黑星病
发病规律
梨树
药剂防治
pear scab,incidental pattern,chemical prevention and treatment
