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- W2365571128 abstract "The larvae of orange wheat blossom midge inflict damage on the kernels of wheat. However,owing to their habitats being concealed under glumes, our knowledges about their development andtheir behaviour are vague and meager. The present paper deals with their larval life on the kernelsof wheat in the suburbs of Shanghai. The results may be briefly enumerated as follows: 1. Three instars are definitely known in the larval stage of the orange wheat blossom midge,and they may be easily distinguished by their caudal processes. The first instar is metapneustic inrespiratory system, while the second and the third instars are peripneustic. The sternal spatula, thecharacteristic thoracic armament in the larvae of the family Cecidomyidae, appears in the last instar. 2. The first two instars are active in feeding and growing: the first lasts 4--5 days and thesecond, 5--8 days. The third instar rests upon the kernel within the exuvium of the second andtakes no nourishment from the kernel. 3. The occurrences of larva on a single kernel in the suburbs of Shanghai are most solitary indistribution, just as those already observed by Barnes in England and by Wallengren in Sweden.The frequencies of occurrence in 1954--1957 were analyzed with respect to the levels of population.The higher the level of population in the field, the greater the number of kernels will be injured. 4. The damages to wheat grains are so profoundly manifested that even a single larva woulddestroy the entire grain. Indeed, we have encountered a high percentage of devastated grains(66.2%) each with a single larva in 1954. It is evident that the degree of damage is not primarilydetermined by the number of larvae feeding thereupon. The time of invasion may be of primeimportance. Histological sections of the attacked kernels give valuable hints about the type of injurymanoeuvered by the larvae of this midge, and the position of attack is also vital when it comes nearthe ventral furrow of the grain." @default.
- W2365571128 created "2016-06-24" @default.
- W2365571128 creator A5043092907 @default.
- W2365571128 date "1959-01-01" @default.
- W2365571128 modified "2023-09-24" @default.
- W2365571128 title "STUDIES ON THE ORANGE WHEAT BLOSSOM MIDGE,SITODIPLOSIS MOSELLANA GEHIN. II. THE LARVAL LIFE IN THE EARS OF WHEAT" @default.
- W2365571128 hasPublicationYear "1959" @default.
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