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Assessment of feeding of the brown planthopper in relation to pest control



Assessment of feeding of the brown planthopper in relation to pest control



Acta Entomologica Sinica 30(2): 169-174



The brown planthopper (BPH) Nilaparvata lugens Stal is a key post to rice crop in China. Assessment of its feeding has been carried out by means of measuring the areas of honeydew drops on filter paper after treatment with ninhydrin (Heinrichs et al. 1981). The results are as follows. 1. The increase of ingestion during the whole life span from egg hatching to adult death is shown in Fig. 3. 2. The relation between the developmental stage expressed in days after hatching and the accumulative quantity of food intake is N(t) = 0.0531 t2.298 where, N(t) = the accumulative quantity of food intake; t = days after hatching. 3. The ratios of food intake in the durations of different nymphal instars and adult can be expressed as 1.00, 1.66, 2.10, 3.16, and 10.26 for nymph and 73.17 for adult. 4. The averaged food intake of brachypterous females is 6.33-fold over that of macropterous males during the first eight days after hatching. 5. Based on the assessment of feeding of BPH during its whole life, the suitable time of carrying out chemical control seems to be the teneral adult stage.

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Accession: 001533063

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