The Wrangell sentinel., 1944-05-12
Alaska Agricultural Extension
 Service
 v. B. CARTER
hsslt in Feod Produetion

I dltiOns along Alaska's coast
 line throughout most of the l growing season dusts used to
 control garden pests and dis
 eases are out of the question.
 Consequently this treatise will
 deal with the use Of sprays and
 dips only.
 General Crop Insects
 1 The most troublesome of the l sucking insects are the Aphids or 1 Plant Lice. There are many kinds of colors. During the growing season IBhese are born alive, mature in a few days, and each may bear sev- eral young daily. Because they null ! tiply so rapidly and generally con- form with the color of the plant they may get a enormous start in Ia garden before being discovered causing severe damage. Constant l alertness, or better yet, regular spraying with a contaqt insectide, of any of the PyTethrum, Ratenone or Nicotine sprays, are effective aphicides. To be effective sprays should contact at least 95qo of the aphids. Follow directions by the manufacturer explicitly. These sprays are effective in the control of pittle bugs.
 Snails and cutworms though not bad pest cause considerable dam age at times. Keep yonr garden and surrounding premises clean. Do not allow decaying vegetation to accum- ulate. Keep loose boards and empty flats picked up. For control of snails and cutWoTms any of the i'm pregnated dried apple poisoned baits on the market are the most rel- able. The poisoned bran baits are good but are not so effective once they become saturated with water.
 The Cabbage Root maggot is chiefly injurious to plants of the mustard family, such as cabbage, cauliflower, Tadish, turnips, etc. InI early spring, the small fly resembI- ing the house fly but a trifle small CT will lay eggs n the ground at the base of the plants. The eggs may be discovered readily in the upper quarter inch of soil. These hatch in about a week or less, un- der favorable conditions, and the larva feed on the underground DOT riOns of the stem and on the roots. Affected plants wilt on sunny days, become stunted and die During the growing season, the maggots mature in about three weeks and pupate in the soil arond the infested plants, and about two weeks later a second brood of adults appear. Late broods are serious pests of fall radish, tur- nips and rutabagas. The pupa from the last brood remain in the soil over the winter.
 Control on cabbage and related plants can be secured by the use of carrosiYe sublimate, one ounce of the powder or crystals dissolved in ten gallons of water. The material which is deadly poison if taken Internally may be dissolved most conveniently in small quantity of hot water and diluted to the reauir- ed strength. The solution may be applied with a knapsaek sprayer. with the nozzle removed; with A small apparatus designed for the purpose. or with a bucket and dip per
 A half cupfui to the plants fs re- quired and it should be applied. if possible, when the soil is not too wet or dry, as the solution will then fiOw into the soil more read fly. Avoid Wetting the leaves. aI- though damage Is likely to result only to the more tender plants
 me first application may be made 3 to days after setting the plants in the field, or it may be withheld until frequent inspection reveals the presence of eggs. If in- speetion is made every 2 or days the application is more effective, if made about three days after eggs are first discovered, at which time more eggs will have been deposited.
 A second application should fol- low Tn to 10 days, and a third ap- pIlcation may be necessary.
 Because cabbage and related 'C SSnucucy .IO De eOIt, while in the seed bed, due to dark weather, corrosive sublimate control Tn the seed bed Is difficult. For this and other reasons calomel .suspen- sion for seed bed and field control or root maggots Is to be preferred.
 Recently calomel has been used extensively to combat the cabbage maggot. The recommendations that Follow are excerpts from circular No. 164-N. Y. State Agricultural experiment Station, Geneva, N. Y.:
 Control in the Seedbed Calomel suspension -C Calom e may be applied in the same way and at the same dosage as corrosive subiimate and is equally effective. Since 1t Is not soluble in water and