Abstract
Leaf folder, Cnaphalocrocis inedinalis (Guen.) is inflicting severe losses in rice since its endemic outbreak in Punjab during 1984. Three dust, 6 emulsifiable con-centrates and 3 granular insecticides were evaluated for its control at adaptive re-search farm and 3 farmer's farms in district Sheikhupura. The dust and spray mate-rials measured 40 kg and 400 litres/ha, respectively. Two applications of all the in-secticides, 45 days after transplanting and 21 days afterwards were made.
Sevin 10 > proved to be the best followed by MC 10 D (higher dose) and Folidol (Parathion) SO EC with 103.0, 100.0 and 972% increase in yield over the check, respectively and corresponding leaf folder control figures. Basudin granules were ineffective but its emulsifiable concentrate formulation used as spray was moderately effective.
INTRODUCTION
Leaf folder, Cnaphalocrocis niedinalis (Guen.) is inflicting severe losses to paddy crop since its endemic outbreak during 1984. Feakin (1978), De Dana (1981) and Inayat-Ullah et at (1985) ranked leaf folder as one of the major rice pests and found that usa thion, Galecron, Nogos, Cygon (Rogar), Anthio, Malathion, Azodrin, Sum-Lorsban, Sevin, Mipcin, Padan and Furadan formulations were effective against the pest. Raju a al. (1988) found Azodrin 100 EC spray as the most effective insecti-cide against this pest. Lorsban and Dimecron proved second and third, respectively. For the similar reasons, the present studies were undertaken.
MATERIALS AND METHODS
Trials to evaluate 3 dust, 6 emutsiliable concentrates and 3 granular insecticides for
the control of rice leaf !bider/roller were conducted at the Adaptive Research Farm (AR.F) and 3 farmers (arms (FF) in district Sheikhupura (Table 1). The experiments were laid out in completely randomized block design with 3 replications. The plot size was 5 x 10 r111 at ARF and 5 x m at FF. Thirty to 35 day-old nursery of B-370 variety was transplanted in the third week of July at 22 x 22 cm spacing. Fertilization and other agronomic practices were similar and ac-cording to departmental recommendations in all the treatments.
The dust insecticides (D) were dusted on the crop in the early morning and gran-ules (G) were broadcasted in standing wa-ter. The spray, volumed 400 Liha was ap-plied with hand knapsack sprayer. Two in-secticidal applications, 45 days alter trans-planting (DAT) and 21 days thereafter, were made. (Table 1).
