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番茄早疫病在我省发生普遍,为害严重。影响着番茄的产量和品质。1985—1987年,对发病规律进行了调查和药剂防治试验,明确了早疫病发生规律。一般年份在5月中下旬—6月初开始发病,春季雨量大,相对湿度大,发病早。6月下旬—8月中旬,如果雨量大,相对湿度在60—85%时,气温在23℃—26℃(28℃),番茄早疫病就会流行。9月下旬湿度虽大,但因气温下降,早疫病不再发展。药剂试验表明:70%代森锰锌、多效速灭菌、50%多菌灵效果较好,防效可达79—85%,亩增产11—16.2%。第一次喷药应在大田发现中心病株时进行,以后每隔7—10天再喷一次,共喷3—4次。
Tomato early blight occurs in our province is widespread, serious damage. Affect the yield and quality of tomatoes. From 1985 to 1987, the incidence of law was investigated and drug control experiments, clear the law of early blight. The general year began in late May - early June onset, spring rainfall, relative humidity, early onset. From late June to mid-August, early blight of tomato will prevail if the rainfall is high and the relative humidity is 60-85% and the temperature is 23 ℃ -26 ℃ (28 ℃). Although humidity is high in late September, early blight no longer develops due to the temperature drop. Pharmacy tests showed that: 70% mancozeb, multi-effect sterilization, 50% carbendazim better, control effect of up to 79-85%, mu yield 11-16.2%. The first spray should be found in the field when the disease in Daejeon, and then spray once every 7-10 days, a total of 3-4 times spray.