RESIDUE AND ANALYTICAL ASPECTS
Haloxyfop has been developed as a selective herbicide for the control of grass weeds in broad-leaf crops. It was evaluated for the first time by the 1995 JMPR.
The 1995 Meeting could not complete the evaluation of the studies of ruminant and poultry metabolism which were provided in the time available and the evaluation was postponed until the present Meeting. The estimation of a maximum residue level for peas (legume vegetables and their fodders) was also postponed to await clarification of the exact Codex commodities to which the data applied. The 1995 Meeting estimated a number of maximum residue levels but could not recommend them for use as MRLs because of the lack of critical supporting data on the uptake by plants of haloxyfop and its degradation products from soil.
The present Meeting received information on the commodity described as 'peas' and data on the uptake of residue from soil. Metabolism studies on lactating goats and laying hens were evaluated.
The Meeting estimated supervised trials median residue levels for bananas, citrus fruits, cotton seed, crude cotton seed oil, fodder beet, grapes, peanuts, peas (pods and succulent seeds), pome fruit, dry pulses, potatoes, rape seed, rape seed meal, crude and edible rape seed oil, unprocessed rice bran, husked and polished rice, soya bean meal, crude and refined soya bean oil, sugar beet, refined sugar, pressed sugar beet pulp, sunflower seed, chicken meat, edible chicken offal and eggs.
The Meeting withdrew the provisionally estimated maximum residue levels for fodder crops and cattle products because information on the moisture content of the fodder crops was lacking and the calculated intake from cattle feed was higher than the highest dosing level in the submitted feeding studies.
FURTHER WORK ON INFORMATION
Desirable
1. Information on the moisture content of fodder crops.
2. Ruminant feeding studies at a feeding level comparable to the maximum residue level found in fodder crops.
