I this spring cold air activity, temperature fluctuations, heating and cooling process, and in early May, windy weather more significant rainfall and low temperature stage, greenhouse vegetable planting perennial seedlings grow slowly, later, decreased resistance. According to the province's vegetable monitoring points to 15 May 8th survey of pests of vegetables have begun the occurrence and damage of greenhouse pests. At present the main diseases of cucumber bacterial angular leaf spot, downy mildew, Fusarium wilt, target leaf spot, Sclerotinia sclerotiorum, the main diseases of tomato leaf mildew, virus disease, Botrytis cinerea, late blight and early blight and canker. Occurrence of cucumber angular leaf spot, leaf mold of tomato early low temperature type disease has been more common, angular leaf spot of cucumber was 37.7%, the average disease incidence shed 23.5%, the average rate of tomato leaf mold disease shed 31%, 5.5% incidence and other diseases in some areas has started to happen. Qigihar City suburb of cucumber downy mildew disease incidence rate of 67%, shed 100%, cucumber disease incidence rate of 34%, 50% shed. Daqing City suburb of Cucumber Target Leaf spot disease incidence rate 33%, shed 86.7%, cucumber wilt disease shed rate of 33%, 2.7% incidence of Botrytis cinerea, disease incidence rate of 67%, shed 11.3%, tomato late blight disease incidence rate of 67%, 5.3% shed. Mishan city of cucumber downy mildew disease incidence rate of 4%, shed 16%, tomato virus disease incidence rate of 4%, shed 23%, tomato early blight disease incidence rate of 2%, shed 4%, tomato canker disease incidence rate 2%, shed 18%, bean virus disease incidence rate of 2%, 4% shed. Mudanjiang City suburb of tomato virus disease incidence rate of 33%, 2.7% shed. Shuangyashan City suburb of tomato late blight disease incidence rate of 33%, 3.2% shed. The greenhouse vegetable pest occurrence of leafminer, whitefly, aphids, beetles, etc.. Leafminers on many crops, the suburb of Daqing City, greenhouse greenhouse cucumber bean strain rate 80%; Binxian greenhouse cucumber in Greenhouse in Mudanjiang City, the suburbs of cabbage worm strain rate were 4.7% and 4%; Ian greenhouse bean strains rate reached 100%. The incidence of Whitefly in Greenhouse of Cucumber in suburb of Qigihar was 33%, and the rate of insect was 20%. The occurrence rate of aphid in Cucumber Greenhouse in Mishan was 2%, and that of insect was 6%. Jump in the suburbs of Mudanjiang City greenhouse cabbage worm strain rate 3%.

The weather forecast, the past 10 days, my temperature rise and then fall, and once again the wind and a wide range of temperature, precipitation, there is conducive to epidemic diseases, is expected to cucumber downy mildew, angular leaf spot, Sclerotinia sclerotiorum, tomato leaf mildew, gray mold, early blight and late blight disease will enter a further aggravated. At the same time, continuous rainfall after the sunny weather, crop root activity is weak, plant wilting, nutrient deficiency and other physiological diseases will also occur in different degrees. In this regard, the country should strengthen the scientific management of greenhouse, timely monitoring and forecasting, guide farmers to adopt comprehensive measures, scientific and effective control of pests and.