In the second half of the year, major crop diseases and pests in Hebei Province are expected to occur at a moderate level overall.

Release Date:

2019-07-10

At the consultation meeting on the trend of agricultural pest and disease outbreaks in Hebei Province for the second half of 2019, held at the end of June, it was learned that, based on preliminary observations of pest and disease incidence, baseline surveys, and a comprehensive analysis incorporating factors such as crop‑planting patterns, farming practices, cultivar resistance, ecological conditions, and weather forecasts—along with actual outbreak data from late June across various regions—experts project that major crop pests and diseases throughout the province will generally occur at moderate levels in the second half of 2019. According to expert assessments, during the first and middle parts of July, the likelihood of adult fall armyworms entering the northern corn‑producing areas, including the Huanghuaihai Plain and North China, will increase; particular attention should be paid to monitoring their presence in the province’s key summer corn‑growing regions.

Experts analyze that, during the first and middle parts of July, the likelihood of adult fall armyworms entering major northern corn‑producing regions such as the Huanghuaihai Plain and North China will increase. Particular attention should be paid to monitoring the pest’s occurrence across the province’s key summer corn‑growing areas, with timely implementation of pest surveillance and control measures to prevent severe damage caused by missing seedlings and broken rows.

At present, spring corn in northern Hebei Province is at the jointing to boot‑stage, while early‑sown spring corn in the central and southern regions has already headed. Summer corn is at the emergence to six‑leaf stage. Overall, pest and disease pressure on corn across the province is moderate, with localized outbreaks of greater severity; migratory pests such as the armyworm and the beet armyworm are causing high‑density, concentrated damage in certain areas. In the second half of the year, mid‑ to late‑season corn pests and diseases are expected to be generally moderate, with localized episodes of heavier infestation, primarily involving borers, leaf‑feeding insects, sap‑sucking pests, and foliar diseases. The armyworm may also pose a risk of concentrated damage in specific locales.

This year, the autumn locust outbreak in Hebei Province is expected to be relatively mild overall, with an affected area of approximately 1.4 million mu. The peak period for third-instar nymphs will occur around August 10 in the central and southern parts of the province and in mid-August in the northern regions, with outbreaks concentrated along the coast, around Baiyangdian Lake, near reservoirs, and in floodplain areas. In the agro-pastoral ecotone of the Bashang Plateau and its adjacent zones, the infestation is forecast to be mild. Autumn grasshopper outbreaks are expected to cover about 2 million mu.

Late blight of potato has been generally mild in the Bashang region of Hebei Province, with some fields experiencing moderate to severe outbreaks. In cotton, mid- and late-season pests and diseases are expected to occur at a moderate level overall, with boll rot and cotton mirids occurring at a moderate level and locally reaching moderate to severe levels. Whiteflies, whitefly species, summer aphids, and red spider mites are expected to occur at a moderate level. The third generation of cotton bollworm and cotton verticillium wilt are anticipated to occur at a mild level.

In the second half of the year, peanut diseases and pests in Hebei Province are expected to occur at a generally moderate level. Specifically, peanut leaf spot is forecast to be mild overall, with localized areas experiencing moderate severity; scab, stem rot, anthracnose, bacterial wilt, and rust are expected to occur at low levels. The third generation of cotton bollworm is anticipated to be moderate, while the beet armyworm may reach moderate to severe levels in some regions.

Overall, vegetable pests and diseases are at a moderate level of incidence, with localized areas experiencing more severe outbreaks. Specifically, cucumber downy mildew, cucumber powdery mildew, cucumber bacterial angular leaf spot, Chinese cabbage downy mildew, and eggplant verticillium wilt are occurring at a relatively severe level. Tomato early blight, tomato late blight, cucumber target spot, brown spot, Chinese cabbage soft rot, green pepper blight, and celery leaf spot are at a moderate level, with some localized areas showing more severe occurrences. Bean rust, as well as viral diseases affecting cucurbits, solanaceous crops, and cruciferous vegetables, are ranging from mild to moderate in severity, while root-knot nematode disease is locally more severe. The incidence of tomato yellow leaf curl virus is strongly influenced by the use of resistant varieties; non‑resistant tomato cultivars are likely to experience more severe outbreaks, and tomato bacterial pith necrosis is on the rise.

Source: Hebei News Network

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