1. A time switch can accurately control the photoperiod.

2. The experiment shows that photoperiod was an important environmental factor affecting armyworm development, reproduction and flight.

3. The effect of short-day photoperiod is evident in the vernalization process on the ecotype of winter wheat varieties.

4. Photoperiod produces little influence on the diapause of housefly larvae.

5. The effects of photoperiod and temperature on fertility of Nongken 58S and its derivedPGMSRs (subsp. japonica) were studied in artificially controlled condition.

6. Objective To explore the effects of temperature and photoperiod on diapause of housefly larvae.

7. The effects of temperature, humidity and photoperiod on the development of citrus red spider mite( Panonychus citri McGregor)were studied by means of orthogonal method in laboratory.

8. Longer photoperiod appropriately could stimulate the growth of yellow perch, and reduced its feed parameter.

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9. The effects of a constantly changing photoperiod on the nymphal development of Tartarogryllus minusculus are investigated in this paper.

10. Photoperiod sensitivity was the major obstacle of using tropical and sub - tropical germplasm in temperate zone.

11. Fertility response to photoperiod and temperature in 76 dual purpose genic male sterile lines(Oryza sativa L. ) was studied under 9 controlled combinations of photoperiods with temperatures.

12. The environmental factors involved in flowering induction , such as photoperiod changes, vernalization , and drought, affect ABA levels .

13. Biological and environmental factors are the main factors that influence plant phenology, especially the latter, among which the dominating factors are air temperature, photoperiod and water.

14. Effects of environmental factors such as temperature, light intensity, photoperiod and PH value on rooting of the tissue- cultured plantlets in sweet pepper were studied.

15. The inherent characteristics of uncomplete bolting cultivars of subecotype 2 of Low Temperature Sensitivity Ecotype remained unchanged under all temperature and photoperiod treatment combinations.

16. Passiflora Caerulea is the plant requesting long sunshine with Photoperiod effect. Long sunshine can promote budding and flowering.

17. As a short-day and temperature-bias plant, Soybean variety is sensitive to photoperiod and temperature, which account for its narrow plant area.

18. Although the tropical and subtropical zone had different germ plasm with our country's and American's in maize, photoperiod sensitivity had restricted its use in temperate zone.

19. The pistillody of stamens of 291 S could be induced under certain photoperiod and temperature condition.

20. The results shown that maize relatives of genus Zea can be directly crossed with maize, and grained F1 seeds. Maize relatives and their interspecies hybrids have strong heterosis photoperiod response.

21. Quantitative analyses and dynamic simulation were undertaken on vernalization, photoperiod response, and their relationships to development progress in wheat.

22. It was found that the major factors determining the differentiation of the Asian corn borer in the second generation were photoperiod and temperature in the larval period in that area.

23. The decision variable for the growth period of the majoritity of 10 GMS rice line is temperature, except that for HS-3 and SE21S is photoperiod.

24. I would expect most people would actually be happier with a Martian photoperiod.

25. At present, the late-flowering mutants are fallen into four pathways: photoperiod pathway, vernalization pathway, autonomous pathway and GA pathway according to factors described above.

26. The results support the hypothesis that ambient temperature combined with photoperiod induce the thermogenic adjustments for small mammals.