Assessment of avoidable losses due to seed borer, Trymalitis margarias Meyrick in different varieties of sapota under high density plantation

PARTH K PATEL, BISANE K.D.

Abstract


Studies were conducted to assess avoidable losses due to seed borer, Trymaliti margarias Meyrick in eight varieties/hybrids of sapota under high density plantation (5 x5 m). The fruit infestation was found significantly maximum in Kalipatti (3.91%) and DHS 2 (3.13%) under protected condition in overall six fruit pickings. Whereas under unprotected plot, the significantly higher fruit damage of 7.81% was reported in Kalipatti, after that in DHS 2 (5.88%) and Cricket ball (5.00%). The maximum reduction of fruit damage was found in Kalipatti with 49.93%, after that in Cricket ball (48.00%) and DHS 2 (46.76%). However, the fruit damage reduction was less in PKM 4 (29.67) and
PKM 3 (27.94%), which already had less fruit infestation under unprotected plot. In terms of avoidable losses on the basis of marketable fruits yield, the losses were anticipated more in Cricket ball (53.99%), Kalipatti (51.90%), DHS 2
(49.35%) and CO 3 (45.16%). However, the moderate to low avoidable losses were noted in DHS 1 (38.51%), PKM 3 (36.00%), PKM 1 (31.33%) and PKM 4 (28.70%).


Keywords


Avoidable losses, sapota, seed borer, Trymalitis margarias, high density plantation

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