Distribution patterns of the critical stages of the major pod borer, Adisura atkinsoni (Moore) of field bean were studied at Bangalore, India. Eggs of A. atkinsoni and the pods damaged by its caterpillar followed negative binomial distribution. Eggs were distributed mostly on tender pods and those on tender pods (< 0.5 cm wide) were highly correlated with total number of eggs laid on the inflorescence. Flat bored pods of 0.6-1.5 cm width were highly correlated with total number of bored pods per inflorescence. Compared with matured bored pods, flat pods also had more borers inside. 69.23% of the matured bored pods were without borers. Hence it is suggested that the eggs on tender pods and borer damage on flat pods, should both be observed before control measures are initiated.Key Words: Field bean, Lablab purpureus, Adisura atkinsoni (Moore), tender pods, flat pods, matured pods, distribution of eggs, distribution of bored pods Resume-Nous avons etudie a Bangalore des modeles de distribution des stades critiques de l'insecte perceur dit Adisura atkinsoni (Moore) qui ravage le plus les haricots de champs (Lablab purpureus). Les oeufs des insectes A. atkinsoni et les cosses detruites par les chenilles de ces insectes suivaient une distribution binomiale negative. Le rapport de la variance a la moyenne et les valeurs de K montraient egalement la tendance de ces insectes a se grouper. Les oeufs etaient distribues surtout sur les cosses tendres et le nombre d'oeufs deposes sur les cosses tendres (<0,5cm de largeur) etait sensiblement correle avec le nombre total des oeufs deposes sur l'inflorescence. Le nombre de cosses plates et percees de largeur de 0,6-1,5 cm etait sensiblement correle avec le nombre total de cosses percees pour chaque inflorescence. En comparaison avec les cosses mures et percees, les cosses plates avaient plus des insectes perceurs a l'interieur. 69,23% des cosses mures percees etaient sans insectes perceurs. Nous suggerons done que Ton devrait observer les oeufs sur les cosses tendres ainsi que les degats causes par les insectes sur les cosses plates avant de commencer toutes mesures de controle.
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