In 2020, due to the higher temperature and precipitation with previous years, and the more basic number of main pests and diseases before winter, pests and diseases are severely occurred in winter wheat regions of China. The total area affected by wheat yellow rust (Puccinia striiformis), sheath blight (Rhizotonia cerealis), fusarium head blight (Fusarium graminearum) and aphid (Sitobion avenae & Rhopalosiphum padi) is estimated to be 16.3 million hectares.

In 2019, soybean cyst nematode (Heterodera glycines Ichinohe), soybean rust (Phakopsora pachyrhizi Sydow), soybean aphid (Aphis glycines Matsumura) and soybean bollworm (Helicoverpa armigera) slightly occurred in four main soybean production countries, including America, Brazil, Argentina, and China.

In September 2019, rice blast (magnaporthe oryzae) and rice planthopper (nilaparvata lugens) slightly occurred in twelve main rice production countries, including China, India, Thailand, Bangladesh, Indonesia, Myanmar, Vietnam, Cambodia, Philippines, Pakistan, Nepal and Laos.

In 2019, due to the higher temperature and higher precipitation than previous years, pest and disease are moderately occurred in maize regions of China. The total area affected by maize armyworm (Mythimna separata), maize fall armyworm (Spodoptera frugiperda) and maize northern leaf blight (Setosphaeria turcica) has reached 6.2 million hectares, and armyworm and northern leaf blight decreased by 11.8% in 2019 compared with the previous year, affected area by fall armyworm reached 1.2 million ha in China firstly.

In 2019, due to the higher temperature and higher precipitation than previous years, pest and disease are moderately occurred in rice regions of China. The total area affected by rice planthopper (Nilaparvata lugens), rice leaf roller (Cnaphalocrocis medinalis) and rice sheath blight (Rhizoctonia solani Kühn) has reached15.3 million hectares, compared with the previous year decreased 35.2%.

Mid-late September in 2019, due to the higher temperature and higher precipitation than previous years, pest and disease are moderately occurred in maize regions of China. The total area affected by maize armyworm (Mythimna separata), maize fall armyworm (Spodoptera frugiperda) and maize northern leaf blight (Setosphaeria turcica) has reached 6.2 million hectares.

Mid-late September in 2019, due to the higher temperature and higher precipitation than previous years, pest and disease are moderately occurred in rice regions of China. The total area affected by rice planthopper (Nilaparvata lugens), leaf roller (Cnaphalocrocis medinalis) and sheath blight (Rhizoctonia solani Kühn) has reached 15.2 million hectares.

Early September in 2019, due to the higher temperature and higher precipitation than previous years, pest and disease are moderately occurred in maize regions of China. The total area affected by maize armyworm (Mythimna separata), maize fall armyworm (Spodoptera frugiperda) and maize northern leaf blight (Setosphaeria turcica) has reached 5.8 million hectares.

Early September in 2019, due to the higher temperature and higher precipitation than previous years, pest and disease are moderately occurred in rice regions of China. The total area affected by rice planthopper (Nilaparvata lugens), leaf roller (Cnaphalocrocis medinalis) and sheath blight

(Rhizoctonia solani Kühn) has reached 14.8 million hectares.

Mid August in 2019, due to the higher temperature and higher precipitation than previous years, pest and disease are moderately occurred in maize regions of China. The total area affected by maize armyworm (Mythimna separata), maize fall armyworm (Spodoptera frugiperda) and maize northern leaf blight (Setosphaeria turcica) has reached 5.5 million hectares.

Mid August in 2019, due to the higher temperature and higher precipitation than previous years, pest and disease are moderately occurred in rice regions of China. The total area affected by rice planthopper (Nilaparvata lugens), leaf roller (Cnaphalocrocis medinalis) and sheath blight (Rhizoctonia solani Kühn) has reached 13.4 million hectares.

During April to May 2019, pests occurred heavier than diseases in eleven main winter wheat production countries, including Russia, China, United States, Pakistan, Iran, France, Turkey, Germany, Canada, Uzbekistan and United Kingdom. The total affected area by wheat rust (Puccinia striiformis) and aphid (Sitobion avenae & Rhopalosiphum padi) has reached 27 million hectares.