protection of rubber wood from insect borers - Kerala Forest ...

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Table 5. Insect activity recorded in labortatory and field trials usingtreated planksNo123567810TreatmentChlorpyriphos 0.1% +10% BAELaboratoryNilInsect activityFieldChlorpyriphos 0.2% + Nil Nil10% BAEChlorpyriphos 0.5% + Nil Nil10% BAEFenvalerate 0.01% +10% BAEIINil~NilFenvalerate 0.05% Nil NilFenvalerate 0.1% + Nil Nil10% BAECypermethrin 0.01% + Nil Nil10% BAECypermethrin 0.05% + Nil Nil10% BAE9 Cypermethrin 0.1% +10% BAEIControl Slight Slight feeding by S. anale,feeding by Heterobostrychus aequalistest insects and Lyctus brunneusINilLaboratory trialsLaboratory trials using veneers were carried out with L.brunneus as thetest insect. The bundles of treated veneers were stacked in the glass troughcontaining a stock culture of the insect and monthly observations weremade on insect activity for a period of one year. The insect activityobserved in the various treatments is given in Table 6.Excepting treatments 14 (Chlorpyriphos 0.5% + Chlorothalonil 0.5%) and15 (Fenvalerate 0.1% + Chlorothalonil 0.5%), presence of insects wasnoticed in all other treatments. The insects were found between theveneers that have been bundled for each treatment. The insects wereactive, but no boring or establishment in the veneers was noticed. Fungalattack was present on veneers in most of the treatments except 14 and 1512
~~~where the fungicide, Chlorothalonil was used along with the insecticide.Since there were no pest build up in any of the treatments, all thetreatments can be considered as equally effective. However, only thetreatments 14 and 15 showed absolute freedom from both insects andfungi and hence these may be considered as quite satisfactory for routinepreservative treatment in industrial units.Table 6. Insect activity recorded in the laboratory trials using veneersSl.No.5678910111213141516TreatmentsFenvalerate 0.05%Trial1 2* *Fenvalerate 0.1% -Cypermethrin 0.01% * *Cypermethrin 0.05% * -Cypermethrin 0.1% *Boric acid 3%Boric acid 5% *Boric acid 10% * -Boric acid (3 % +Chlorothalonil (0.5 %)Chlorpyrip-hos(0.5%) +Chlorothalonil (0.5%)Fenvalerate (0.1%) +Chlorothaionil (0.5%)Control (Water)+ -* *13-Insect activityLive beetles in trials 1 an2. but no trace of feeding.Fungal growth in trial 3.- Noinsects.- Live beetles in trials I and-I2, but no feeding.~ ~~Live beetles in trial 1. butno feeding. Fungal growthin trials 2 and 3.- Live beetles in trial 2, butno feeding. Fungal growthin trials 2 and 3.- INo insects. Fungal growthin trial 1.- Live beetles in trial 2. butno feeding. Fungal growthin trial 3.- Live beetles in trial 1. butno feeding. Fungal growthin trials 2 and 3.-- ILive beetles in trial 1, butno feeding.No insect or fungal attackNo insect or fungal attackIII- No insect present* Insect present13
Page 2 and 3: CONTENTSPage FileAbstract 1 r.189.2
Page 5 and 6: etc. The beetles are brown in colou
Page 7: (Platypus solidus Wlk. and P. latif
Page 10 and 11: undle was exposed to laboratory bre
Page 12 and 13: of the sample and is expressed in t
Page 16 and 17: Field trialsObservations made each
Page 18 and 19: CONCLUSIONSnsect attack coupled wit
Page 20: McQuire, A. J. (19621. Stain and mo

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