. [Conferenze scientifiche]. campi da vivaio ofinsects di tendenza distruttiva che superamento surroundingfarms in misura tale che nessun settore può proteggere againstthem. Questo, quindi, mi permetta di dire a tlie agricoltori dei ver-mont ; che con successo una campagna contro il vostro insetto ene-mies può essere determinato soltanto dalla domanda dei vostri stessi ; e che decreti legislativi deve fornire lo stato del geologo. 11 Mezzi e dare il potere di azione. Ulteriori: deve alsoprotect questa azione concertata dalla thriftless ignoramusthat dont care per se stesso o dei paesi vicini. Il fatto è che chela

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. [Scientific lectures]. fields to be the nursery ofinsects of destructive tendency, which overrun surroundingfarms to such an extent that no industry can protect againstthem. This, then, allow me to say to tlie agriculturists of Ver-mont ; that a successful campaign against your insect ene-mies can only be brought about by the demand of your-selves ; and that legislative enactments must furnish the STATE GEOLOGIST. 11 means and give the power of action. Further: It must alsoprotect this concerted action from the thriftless ignoramusthat dont care for himself or neighbors. The fact is, thatthe ravages of hostile insects represent a condition of war, and it is only by organization, and appropriate weapons, thatthey can be conquered. The proper subjects for considera-tion are the materials to be used, the best time to make theattack in force, and the weapons to be employed. It isentirely useless for us to fold our arms and exclaim : It isthe will of God ! The Colokado Potato Beetle. Doryphora decemlineata, Say.. d ^^e a, a, eggs ; b, b, larva iii different stages of growth ; c, the pupa ; d, beetles; e, elytron magnified; f, leg raagnifled. This pest is now really in our midst, and though not asyet iti sufficient numbers to do much harm, its previous his-tory ought to give us warning. The great interest felt onaccount ot this intruder has been manifest by the countlessbugs of all descriptions that I have received by mail this 12 BIEHmAI. REPORT OF THE season, with the enquiry : Whetlier it is a potato bug.Nine times out of ten I could say it was not; but the num-ber of actual potato beetles has led me to the belief thatthere is hardly a town in the State that has not in it thedreaded pest; in small numbers, it is true, but yet if notimmediately attended to, two seasons more will bliglit ourcrop of potatoes as elsewhere. That all may recognize thispest, I will give something of its appearance, history andhabits. This bug, so called, is, strictly speaking, a beetle, and

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1870
• booksubjectscience
• bookyear1872