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Influences of Related Physiological and Environmental Factors on Development and Cold Tolerance of the Meadow Moth, Loxostege Sticticalis

Author: LiChaoXu
Tutor: PanXianLi;LuoLiZhi
School: South China University of Tropical Agriculture
Course: Agricultural Entomology and Pest Control
Keywords: Meadow moth Feed Development Resistance to the cold Cold substance
CLC: S433.4
Type: Master's thesis
Year: 2005
Downloads: 150
Quote: 3
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Abstract


Grass the borer Loxostege sticticalis L. (Lepidoptera: Pyralidae) is an important pest in North China, Northeast and Northwest agricultural and livestock production. Three outbreaks since the founding of New China, causing huge losses to China's agricultural and livestock production. In order to clarify the the meadow moth larvae occurrence rules, in order to improve and enhance the level of forecasting to provide a scientific basis for three kinds of host plants and artificial diet affect of meadow moth larvae growth and development, the study reveals the formation of diapause larvae major environmental factors, the larvae of the ability and the related environmental physiological factors, and identified parasites moisture content and the substance of some of the energy differences result in larvae of the differences the main reason, to get some more meaningful results, mainly as follows: the study identified the gray dishes are the best host plants of the meadow moth larvae: application Chenopodium Chenopodium album L. (Chenopodiaceae), alfalfa Medicago sativa L. (Leguminosae) and spinach Spinacia oleracea L. (Chenopodiaceae results) seedlings of the meadow moth larvae reared larvae fed on these three plants are able to develop to adults, but in the developmental duration, there are significant differences in survival, pupal weight and emergence rate. To feeding larval developmental duration gray dishes shortest, the highest survival rate, pupal weight maximum, while feeding the spinach followed. The longest feeding alfalfa sprouts larval developmental period, pupal weight minimum, larval survival and emergence rate lowest. These results suggest that these three plants can complete immature development of the meadow moth, gray dish is the meadow moth is the most suitable host plants. The results of such research and the conclusions of the previous consistent. Tested relationship the meadow moth larvae with food, protein, water content, etc., found more promising in the two kinds of artificial feed formulation: the meadow moth larvae reared results show that the use of artificial feed formulation, feed protein differences in content influence the the meadow moth larvae and a major factor in the growth and development, and high protein content conducive the meadow moth larvae feeding and growth, the higher the protein content in the formulations set meadow moth growth and development is relatively fast, the pupal weight relatively large. Further, the main factors that cause larval survival rate is low preservative content of the moisture content of the feed, and feed can not guarantee the freshness of the feed in the entire feeding process, leading to the feed mildew, causing the death of the larvae, but The preservative content larval feeding high-impact. However, due to the preparation of artificial feed on the growth and development of the meadow moth larvae and gray dish there is still a certain gap compared the existing meadow moth formula also needs further improvement to improve. Artificial feed of meadow moth larvae were reared in an attempt to find a suitable seasonal alternative food and a suitable meadow moth feeding artificial diet, the meadow moth larvae feeding provides the basis and reference for future laboratory.

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CLC: > Agricultural Sciences > Plant Protection > Pest and Disease Control > Plant pest and its control > Lepidoptera pests
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