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- W2347753603 abstract "In the present paper the effects of humidity on the rates of survival and develop-ment of the eggs and the first instar larvae of the armyworm are reported. The resultsobtained from this study are summarized as follows: When the eggs of the armyworm are exposed to humidities ranging from 20% to100% at 25℃ and from 40% to 100% at 32℃ there is no difference in the percen-tages of hatching, but the percentage is decreased markedly as egg exposed to 20% at32℃. At 25℃ and 32℃, it is very apparent that the rate of eggs development isinfluenced by relative humidity, and the 100% relative humidity is also found to be theoptimum for eggs development. The rates of survival and development of larvae in the first instar are obviouslyinfluenced by the relative humidity in the egg stage. At 32℃ the percentage of sur-vival of larvae increases with the rise of humidity in the egg stage. Similar result isobtained at 25℃ with the relative humidities below 60%. The rate of development oflarvae is accelerated with the increase in relative humidity both at 25℃ and 32℃. It is also shown that the rates of survival and development of the larvae in thefirst instar are influenced by the humidity in the larval stage. At 25℃ the rates ofsurvival and development vary directly with the changes of humidity from 20% to100%. At 32℃ the larvae cannot survive until the humidity rises to above 60%. Therefore, the influence of humidity at 32℃ on the survival rates of both eggs andthe first instar larvae is more obvious than that at 25℃." @default.
- W2347753603 created "2016-06-24" @default.
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- W2347753603 date "1964-01-01" @default.
- W2347753603 modified "2023-09-26" @default.
- W2347753603 title "THE RELATIONS BETWEEN HUMIDITIES IN THE ENVIRONMENT AND THE RATES OF SURVIVAL AND DEVELOPMENT OF THE ARMYWORM,LEUCANIA SEPARATA WALKER I.EGGS AND FIRST INSTAR LARVAE" @default.
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