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Trial of insecticides and a fumigant against forest seed pests

Trial of insecticides and a fumigant against forest seed pests

Wali-ur-Rehman

ABSTRACT

In a laboratory trial against Hypsipyla robusta, a fruit borer of Cedrela toona, DDVP 50% EC killed 100% larvae each in 0.05 and 0.03% doses and 83% larvae in 0.01% dose while Laser 25% EC gave 80, 43 and 33% kill of larvae, respectively in 0.05, 0.03 and 0.01% doses. Malathion showed poor results with 36.6 and 26.6% mortality of larvae in 0.05 and 0.03% doses, respectively. In another trial (a fumigant caused 100% mortality of adultas of stored seed pests, Caryedon serratus and Tribolium castaneum, in the doses of 50, 100, 150 and 200 mg per 0.043 m3 volume. No toxic effect of phostoxin was found on the seed germination of Pinus roxburghii, Dalbergia sissoo, Acacia modesta and A. tortilis in the above doses.

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Pakistan Journal of Forestry

December

Vol. 73, Iss. 2

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