Sichuan Provincial Academy of Natural Resource science

Chengdu, China

Sichuan Provincial Academy of Natural Resource science

Chengdu, China

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Zhuang Q.,Sichuan University | Zhuang Q.,Sichuan Provincial Academy of Natural Resource science | Zhuang Q.,Kiwifruit Breeding and Utilization Key Laboratory of Sichuan Province | Hou T.,Sichuan University | Hill M.,New Zealand Institute for Plant and Food Research
New Zealand Journal of Crop and Horticultural Science | Year: 2016

White peach scale (Pseudaulacaspis pentagona) is a polyphagous pest of perennial horticulture in Asia and many other warm-temperate and tropical regions. In China, it is a serious pest of kiwifruit. The optimal time to control P. pentagona field populations is at the first instar stage of the first, spring generation. Three methods for predicting the hatching of eggs of the first generation from field populations were tested on kiwifruit in Sichuan, based upon the accumulation of heat units (day-degrees) above a developmental threshold, calculated as 10.75 °C. A method developed for P. pentagona control in tea in Japan gave excellent predictions of 50% hatching in 5 of the 6 years under study (2009–2014). The other two methods also gave acceptable predictions of dates of 50% egg hatching (within 5 days of field observed dates). These models may be used as a basis for forecasting spring insecticide application dates targeting the first instar stage (crawlers and settled ‘white caps’). © 2016 The Royal Society of New Zealand


Xie Y.,Sichuan Provincial Academy of Natural Resource science | Zhou L.Q.,Sichuan Provincial Academy of Natural Resource science | Wang L.H.,Sichuan Provincial Academy of Natural Resource science | Zhuang Q.G.,Sichuan Provincial Academy of Natural Resource science | And 4 more authors.
Acta Horticulturae | Year: 2015

In comparison of a traditional cultivar of red-fleshed kiwifruit- 'Hongyang' (A. chinensis var. rufopulpa Liang et Ferguson), the genetic characteristics of morphology, cellular and molecular level of a new strain of red-fleshed kiwifruit (A. chinensis var. rufopulpa) 'SF-F0809' were evaluated by means of biological observation, somatic chromosome number counting and ISSR marker analysis. The results indicate that the biological characteristics of the flowers, leaves, fruits, etc. of the 'SF-F0809' are significantly different from those of the 'Hongyang', and its comprehensive properties are better in general. Chromosome number of both 'SF-F0809' and 'Hongyang' is the same, 2n=2x=58, both are diploid; 67 bands are generated in seven pairs of ISSR primers, and 35 of them are polymorphic bands, accounting for 52.24%. Two to nine polymorphic bands are generated by each primer. All data reveal that there are genetic differences between 'Hongyang' and 'SF-F0809'.


Zhuang Q.G.,Sichuan Provincial Academy of Natural Resource science | Zhuang Q.G.,Sichuan University | Zhuang Q.G.,Laboratory of Sichuan Province | Wang L.H.,Sichuan Provincial Academy of Natural Resource science | And 7 more authors.
Acta Horticulturae | Year: 2015

'EnSpray 99' mineral oil has good efficacy against first instar Pseudaulacaspis pentagona and its residues prevented crawler settlement for approximate 12 days after oil application. Oil application was safe when applied to 'Hongyang' kiwifruit to control P. pentagona at the first generation 1st instar (4-18 days after fruit set). 1% oil application during the second generation crawler peak (67-74 days after fruit set) caused 3.6-17.6% speckling damage to the fruit skin, and no damage occurred following oil application 83 days after fruit set. 1% oil application on the first generation 1st instar and later the second generation 1st instar reduced the number of P. pentagona infested fruit and safe to 'Hongyang' kiwifruit.

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